Comparision of GICA and RIA in Determination of HCG in Urine

HCG in urine of 148 women are detected by GICA and RIA. The results that show the determinated range of HCG by GICA is from 120 IU/L to 427 570 IU/L,and the sensitivity is 120 IU/ L;when the concentration of HCG in urine is over 427 570 IU/L, the zone phenomena (antigen excess) will be appeared. The sensitivity by RIA is 25 IU/L and there is not zone phenomena at all. Compared with RIA,the GICA is simple and quick in determination of HCG in urine, but its low sensitivity and zone phenomena should be noted in application.