Therefore, sample dilution is necessary,
and consequently the choice of suitable diluents (nature and concentration)
and dilution factors. In thisway, 0.1% (v/v) Triton X-100,water and
0.2% (v/v) nitric acid were studied as diluents, while dilution factors
ranging from 3 to 10 for blood and 1.5 to 5 for urine were investigated
(Fig. 1).