海带预富集-离心液进样GFAAS测定饮料中的痕量镉

食品科学 ›› 2007, Vol. 28 ›› Issue (12): 409-411.

海带预富集-离心液进样GFAAS测定饮料中的痕量镉

曾雪峰, 陈学泽, 王素燕

中南林业科技大学理学院；中南林业科技大学理学院湖南株洲412006；湖南株洲412006；

出版日期:2007-12-15 发布日期:2011-11-22

Determination of Trace Cadmium in Beverage by Fugation Introduction Graphite-furnace Atomic Absorption Spectrometry after Enrichment of Used Kelp

ZENG Xue-Feng, CHEN Xue-Ze, WANG Su-Yan

College of Science, Central-South University of Foredtry and Technology, Zhuzhou 412006, China

Online:2007-12-15 Published:2011-11-22

摘要/Abstract

摘要： 建立了一种测定饮料中痕量镉的新方法,即采用经1mol/LHCl清洗后的海带粉末在pH值6的条件下捕集饮料中的痕量镉,经膜滤纸抽滤分离和0.3mol/L的HCl洗涤,离心分离后即可得到富集Cd2+的离心液,再采用GFAAS检测。分析结果表明:在100ml饮料样品中,Cd2+特征质量为2.67×10-14g/1%,当n=5时标准偏差SD为0.0064和0.0022,相对标准偏差RSD为0.059和0.020,回收率为97%和103%,检测结果较为理想。

关键词: 海带, 预富集, 石墨炉原子吸收光谱法, 镉

Abstract: A simple and sensitive method has been developed for the determination of cadmium in beverage by kelp centrifugation introduction graphite-furnace atomic absorption spectrometry after enrichment. The cadmium was fixed on finely divided as the complex with kelp was collected on a membrane filter by filtration under suction. then wash down the kelp used 0.3 mol/L hydrochloric acid from membrane filter paper and the centrifugation was directly subjected to the determination by graphite-furnace atomic absorption spectrometry. It is shown that the kelp are rinsed with 1 mol/L hydrochloric acid solution, Cd adsorption on the kelp is improved. When n = 5, standard deviation (SD) of these samples were from 0.0064 to 0.0022 and recoveries added were 97 % and 103 %,the results were comparatively satisfied.

Key words: kelp, enrichment, graphite-furnace atomic absorption spectrometry, cadmium

曾雪峰, 陈学泽, 王素燕. 海带预富集-离心液进样GFAAS测定饮料中的痕量镉[J]. 食品科学, 2007, 28(12): 409-411.

ZENG Xue-Feng, CHEN Xue-Ze, WANG Su-Yan. Determination of Trace Cadmium in Beverage by Fugation Introduction Graphite-furnace Atomic Absorption Spectrometry after Enrichment of Used Kelp[J]. FOOD SCIENCE, 2007, 28(12): 409-411.

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