Table 1. Details of the biochemical analytes studied for stability in blood sample following exposures to different temperature and time conditions, their methodology for analysis and the platforms / instruments used.

Analyte studied, sample type used	Methodology used for analysis	Platforms used in analysis
Haemoglobin, whole blood	Photometric measurement, Cyanmethemoglobin method	3 Part Coulter, Siemens, USA
C-reactive protein, serum	Immunoturbidimetric	Beckman Coulter, AU 480,USA
Total protein, serum	Spectrophotometric, Biuret	Beckman Coulter, AU 680, USA
Albumin, serum	Spectrophotometric, BCP - Dye Binding	Beckman Coulter, AU 680, USA
Ferritin, serum	Chemiluminescence /Two-SiteSandwich Immunoassay	Advia Centaur XP, Siemens, USA
Soluble transferrin receptor, serum	Immunoturbidimetric	Beckman Coulter, AU 480, USA
Vitamin A (Retinol), serum	HPLC-reverse phase chromatography	Thermo Finnigan (spectra system)
Zinc, serum	Atomic absorption spectrometry+F18:F28,	Shimadzu (AA 7000)
Folate, haemolysate	Chemiluminescence / Two-SiteSandwich Immunoassay	Advia Centaur XP, Siemens, USA
Vitamin B12, serum	Chemiluminescence / Two-SiteSandwich Immunoassay	Advia Centaur XP, Siemens, USA
Vitamin 25 (OH) D, serum	Chemiluminescence / Two-SiteSandwich Immunoassay	Advia Centaur XP, Siemens, USA
Glucose, plasma	Spectrophotometric, Hexokinase (UV)	Beckman Coulter, AU 680, USA
Glycylated haemoglobin (HbA1C), whole blood	Ion Exchange HPLC	Variant, Biorad, USA
Total Cholesterol, serum	Spectrophotometric, Cholesterol Oxidase Esterase Peroxidase	Beckman Coulter, AU 680, USA
High Density Lipoprotein Cholesterol (HDL), serum	Spectrophotometric, Direct Measure-Peg/ CHOD	Beckman Coulter, AU 680, USA
Low Density Lipoprotein Cholesterol (LDL), serum	Spectrophotometric, Direct Measure/ CHOD	Beckman Coulter, AU 680, USA
Triglycerides (TG), serum	Spectrophotometric, Enzymatic Endpoint	Beckman Coulter, AU 680, USA
Creatinine, serum	Spectrophotometric, Alkaline Picrate Kinetic (Jaffe’s method)	Beckman Coulter, AU 680, USA