PHOSPHORUS INTERFERENCE AND EFFECT OF DIFFERENT INTERFERENCE SUPPRESSING AGENTS ON THE DETERMINATION OF CALCIUM IN FOOD BY ATOMIC ABSORPTION SPECTROMETRY
- VernacularTitle:原子吸收法测定食品中钙时磷的干扰及干扰抑制剂效果观察
- Author:
Jianxing ZHAO
;
Yuqun LIU
- Publication Type:Journal Article
- Keywords:
calcium food atomic absorption interference suppressing agent
- From:
Acta Nutrimenta Sinica
1956;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Interference of P with determination of Ca in food and the effect of interference suppressing agents of La, Sr and 8-hydroxyquinoline were studied. The results showed that 1) interference of P with Ca related to P/Ca ratio, the relative absorbance of Ca were getting increase along with, the decrease of P/Ca ratio if P/Ca ratio about 0.6; 2) La was more effective than the other interference suppressing agents. The relative absorbance of calcium reached to about 90% when 0.5% or 1% La was used in the P/Ca ratio of 30; 3) Sr had two actions. On one hand Sr had some suppressing action on P interference, and on the other hand Sr depressed the Ca absorption signal obviously; and 4) 8-hydroxyqui-noline had some but not very effective interference suppressing action. The content of Ca determined in food SRM were lower than certified value using 0.1% 8-hydroxyquinoline as interference suppressing agent.
