火焰原子吸收法测定牙釉质中锌和铁的含量

STUDIES ON DETERMINAION OF SELENIUM IN DRINK BY GFAAS

本文用火焰原子吸收法测定牙釉质中锌和铁的含量。测定健康者２６人，锌和铁平均值分别为３２５．８±８４．８μｇ／ｇ和３４．７±９．１μｇ／ｇ；龋病患者５４人，锌和铁平均值分别为２６９．９±６３．５μｇ／ｇ和３８．７±１０．０μｇ／ｇ。测定结果表明，龋病患者牙釉质中的锌明显低于正常者，而铁略高于正常者。

Pd(NO 3) 2 Triton X 100 was used as matrix modifier for determination of selenium in drink.In this way ashing temperature can be increased up to 1200℃ and absorbance can increase by 2 92 times.Interferences of Fe,P and other elements were reduced effectively by means of Zeemen effect background correction.Detection limit is 8 0ng/mL and linear range is from 10 to 120ng/mL and r=0 9931.