THE DETERMINATION OF CALCIUM IN SOME FOODS BY AAS METHOD
- VernacularTitle:某些食物中钙的原子吸收法测定
- Author:
Benren ZHU
- Publication Type:Journal Article
- Keywords:
food calcium AAS method
- From:
Acta Nutrimenta Sinica
1956;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
In this article, a rapid, simple, and dependable method is introduced to determine the content of calcium from 0.5ppm to 200ppm in some foods by AAS. It has not only accuracy but has wide range for the determination of concentration.As for low concentration of calcium, the position of the burner must be parallel to the axis of beam while delerming. For high concentration, changing of the condition of operation is unnecessary except for the burner turn 90? from the axis horizontally. So it is quite easy for operation.The SiO32-, PO43-, and A13+ may interfere in the determination of calcium seriously, but this can be eliminated effectively by adding a certain amount of Sr2+ (as a releasing agent) to the sample to be tested.In the determination of low concentration of calcium, the recovery and coefficient of variation are 95-105% and
