The quantitative determination of total calcium in normal Thai and nephrotic syndrome patients by direct method.

The determination of serum calcium by direct method is suitable for laboratories because it needs only simple instrument, available in most laboratories. The individual serum calcium was determined by direct method in 60 normal Thais (males = 24, females = 37). The value for male was 8.68 – 11.08 mg/dl in female. There was statistically difference between sexes. In one hundred nephritic syndrome patients (male = 46, female = 54) were ranged from 6.59 – 10.71 mg/dl and 6.52 – 11.08 mg/dl in female. Both were statistically different in the same sex, from the normal value. The nephritic syndrome patient had the lower serum calcium than the normal.