Bio

BIOGRAPHY

Eng. Daniel A. Mutuli has B.Sc and M.Phil degrees from the University of Nairobi and the University of Newcastle-Upon-T yne (England) respectively. He is registered engineer by theEngineers Registration Board of Kenya (ERB), and is a member of the Institution of Engineers of Kenya. (IEK), the Institution of Agricultural Engineers (IagrEng, Britain), and

Curriculum Vitae

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(Last updated: November 30, 2021)

Publications

2013

Mbuge, DO, Kanyara MM, Mutai BK, Murunga S, Mutuli DA, Agullo J.  2013.  The Effect of Drying Temperature on Nutrient levels in Oyster Mushroom.. AbstractWebsite

Mushrooms have been identified as an underutilized crop in Africa, with many nutritive and health benefits. It does not require much land and investment. However, it is highly perishable and there is need to process it to lengthen its shelf life by drying. However, there is need to ensure that the nutrients are not lost in the process. It is for this reason that this project investigated the effect of drying on nutrient levels in mushroom. Vitamin C levels were monitored in the course of drying at 80⁰C, 60⁰C, 50⁰C, 40⁰C and in direct sunlight. It was concluded that the temperature that gave the best drying rate with minimal nutrient loss was 60⁰C. In general, more than half the Vitamin C is lost during the range of drying temperatures investigated.
Nyamu, D. Maringa; Maranga, MSM; SM.  2013.  Selecting a Sampling Plan for Reinforcement Bars.

2012

Too, K V; Mutai, MMMEBK; J.  2012.  Viscoelastic Properties of Bulk Groundnuts. Abstract

The groundnut, Arachis hypogaea Linn, samples were collected from the majorly grown areas of western Kenya to investigate the viscoelastic properties pertinent to grain handling, storage and processing. In particular, the study conducted at the University of Nairobi, Department of Environmental and Biosystems laboratories in July 2010, aimed at investigating the stress-strain properties of bulk groundnuts in relation to Maxwell polymer viscoelastic model. The Mohr-Coulomb failure criterion was also applied to bulk groundnuts. Three samples were prepared for triaxial tests; each weighing 1062.4 g. The moisture content of the samples was 7.6%. The sample size for triaxial testing was 100 mm diameter and 199 mm height. Density of the samples during the tests was 678.6 kg/m3. Confining stresses of 200, 400 and 600 kPa were used and Axial Strain Rate (ASR) of 0.5 mm/min was used for the triaxial compression tests. For the senstar universal testing machine relaxation time was about 30 min for each of the samples. Relaxation data was recorded after every 30 sec for the duration of the test (30 min). These results showed that the Maxwell model for viscoelastic polymers can be applied to accurately describe the behaviour of bulk groundnuts.

2011

Mutai, E B K; Otieno, GMMPO; AN;.  2011.  Simulation of the Microclimate in Poultry Structures in Kenya.

2008

Frenea, J.; Bonneaua, MD; S.  2008.  Velocity Measurements Grease – Lubricating Film of a Sliding Contact. Abstract

Experimental results of the velocity distribution in a grease-lubricated cylindrical sliding contact are obtained. A comparison is made with the theoretical results of a parabolic velocity distribution similar to that of a Newtonian fluid, derived from a Bingham plastic flow model. This equation compares very well with the experimental results.

2001

Shitanda, D; Mutuli, DA; OE.  2001.  Physical Properties of Crude Oil from Cape Chestnut (Calendrum capense).

2000

Mutuli, DA, Onyoyo HA, Makhonge PW.  2000.  Situation Analysis of Occupational Safety and Health in Small-Scale Sugarcane Processing Establishments in Kenya.
Majale, MM, Morumbasi J, Mutuli DA.  2000.  Occupational Safety and Health in the Construction Industry in Kenya.

1997

Mutuli, DA, Muiruri SN.  1997.  An assessment of the effect of cultivator design on soil structure during seedbed preparation on a nitosol. Website

1994

A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1994.  Mutuli, D.A. (1994) The Role of Agricultural Engineering in Food Manufacturing . In Proceedings for the Kenya Institute of Food Science and Technology Conference, Nairobi, Kenya, November 7th. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.
A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1994.  Mutuli, D.A. (1994) Some Engineering opportunities for the Sustainable Development of African Agriculture. Proceedings of the FAOE/IEK All African Engineers Conference, December,. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.
A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1994.  Mutuli, D.A. (1994) Agricultural Mechanization in Kenya: A Review of Policies and Strategies to date . In Proceedings International Conference August, Nairobi, Kenya. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.
A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1994.  Shitanda, D., Mutuli, D.A. and Odongo, F. (1994) Indigenous Vegetable Oils in Kenya as a Diesel Fuel . In Proceedings of the Kenya Society of Agricultural Engineers. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

1993

A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1993.  Marenya, M.O., Kaumbutho, P.G., Mutuli, D.A. and Kamau J.N. (1993) Simulation of the Materials Handling Systems in a Sugarcane Mill Yard - A case study . Paper accepted for publication in the AMA Journal.. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

1992

A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1992.  Mutuli, D.A. (1992) Advances in Agricultural Machinery Technology Towards Sustainable Development. Proceedings of the KSAE Annual Seminar, 5-7th August. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

1990

A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1990.  Mutuli, D.A. (1990) An Investigation into the effect of Cultivator Design on seedbed preparation . Proceedings of the Annual Postgraduate Research Conference, University of Newcastle Upon Tyne, England. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

1988

Mutuli, S.M; Bonneau, FD; J.  1988.  Velocity Fields in Grease Lubricated Contacts Under Sliding Conditions.
A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1988.  Mutuli, D.A. (1988)Infiltrating solar collectors for crop drying . Proceedings of the Annual Postgraduate Research Conference, University of Newcastle Upon Tyne, England. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.
A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1988.  Mutuli, D.A. (1988) The performance of an air-infiltrating solar collector M. Phil thesis. University of Newcastle Upon Tyne, England.. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

1985

A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1985.  Mutuli, D.A. (1985) Small holder Coffee Processing in Kenya . Proceedings of the Annual Coffee Seminar, Meru, Kenya. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.
A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1985.  Mutuli, D.A. (1985) Mechanical drying of Arabien Coffee . Proceedings of the Annual Coffee Seminar, Eldoret, Kenya. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.
A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1985.  Mutuli, D.A. et al. (1985) The joint GOK/IDA/CDC/Smallholder Coffee Improvement Project supervision and review mission report. Report of findings submitted to the project steering committee.. World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

1982

Mutuli, S.M.; Bessell, TTJ; ES.  1982.  The Potential of Sisal as a reinforcing Fibre in Cement base materials.
A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1982.  Mutuli, D.A. (1982) The general position paper for the coffee factories section of the Ministry of Agriculture. Government Working Paper (unpublished). World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

1981

A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1981.  Mutuli, D.A. (1981) Draft proposals for the practical training programme for graduate engineers serving the coffee industry in the Ministry of Agriculture . Government Working Paper (unpublished)Mutuli, D.A. (1982). World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

1980

A, MRMUTULIDANIEL, A MRMUTULIDANIEL.  1980.  Mutuli, D.A. (1980). Design of a solar supplemented continuous flow dryer for coffee . Third year design project dissertation. University of Nairobi (unpublished). World Employment Programme Research Working Papers, No. 45. Geneva: International Labour Office.. : Cambridge: Cambridge University Press. Abstract

A description is given of a novel liquid phase immunoassay for the measurement of testosterone in peripheral venous plasma from men and women. The procedure involves: (i) competitive binding of the analyte and tritiated antigen to specific antibodies; (ii) enzymatic conjugation of the free ligand with glucuronic acid; and (iii) separation of the antibody-bound and free ligand by partition of the reactants into an organic and aqueous phase. The technique has been called ligand differentiation immunoassay (LIDIA). The mean sensitivity was 5 pg/tube (equivalent to 0.35 nmol/l female plasma; 0.87 nmol/l male plasma). The mean reagent blank (+/- SD) was 0.24 (0.12) nmol/l female plasma; 0.61 (0.30) nmol/l male plasma. A precision profile gave values less than 50%; the within batch variation was less than 8.3% and the between batch variation over three months was 12.3%. An accuracy profile between the second and penultimate points on the calibration curve gave values between 77 and 103%. The correlation coefficient 'r' between LIDIA and a heterogeneous radioimmunoassay was 0.92 when applied to plasma from men and 0.95 to samples from women.

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