钯基体改进剂-石墨炉原子吸收光谱法测定茶叶中的铅和镉

目的建立石墨炉原子吸收光谱法测定茶叶中的痕量铅和镉。方法采用湿法消解对茶叶样品进行消解,加入氯化钯、硝酸镁、磷酸二氢铵作为基体改进剂扣除样品中背景干扰的影响,并优化仪器条件进行石墨炉原子光谱法测定。结果测定茶叶样品中铅的最佳基体改进剂为氯化钯-硝酸镁,测定镉的最佳基体改进剂为磷酸二氢铵＋硝酸镁。铅优化后的条件为：灰化温度为900℃、原子化温度2000℃,镉优化后的条件为：灰化温度为700℃,原子化温度1100℃。结论本方法简便、快速、准确,可适用于茶叶样品中铅、镉的分析。...

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Bibliographic Details
Published in食品安全质量检测学报 Vol. 8; no. 5; pp. 1771 - 1777
Main Author 凌程江 贾彦博 陈美春 洪春来
Format Journal Article
LanguageChinese
Published 杭州海润泰合检测技术有限公司,杭州,310004%杭州市食品药品检验研究院,杭州,310022%浙江省农业科学院环境资源与土壤肥料研究所,杭州,310021 2017
Subjects
基体改进剂
石墨炉原子吸收光谱法
茶叶
铅
镉
茶叶
tea
石墨炉原子吸收光谱法
graphite furnace atomic absorption spectrometry
铅
镉
cadmium
基体改进剂
lead
matrix modifier
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ISSN2095-0381

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Summary:目的建立石墨炉原子吸收光谱法测定茶叶中的痕量铅和镉。方法采用湿法消解对茶叶样品进行消解,加入氯化钯、硝酸镁、磷酸二氢铵作为基体改进剂扣除样品中背景干扰的影响,并优化仪器条件进行石墨炉原子光谱法测定。结果测定茶叶样品中铅的最佳基体改进剂为氯化钯-硝酸镁,测定镉的最佳基体改进剂为磷酸二氢铵＋硝酸镁。铅优化后的条件为：灰化温度为900℃、原子化温度2000℃,镉优化后的条件为：灰化温度为700℃,原子化温度1100℃。结论本方法简便、快速、准确,可适用于茶叶样品中铅、镉的分析。
Bibliography:LING Cheng-Jiang1, JIA Yan-Bo2, CHEN Mei-Chun2 , HONG Chun-Lai3 （1. Hangzhou Harrens- TH Testing ＆ Technology Co., Hangzhou 310004, China; 2. Hangzhou Institute for Food and Drug Control, Hangzhou 310022, China; 3. Institute of Environment, Resource Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China）
11-5956/TS
tea;lead;cadmium;matrix modifier;graphite furnace atomic absorption spectrometry
Objective To establish a method for determination of lead and cadmium in tea by graphite furnace atomic absorption spectrometry.Methods Tea samples were wet digested by adding palladium chloride,magnesium nitrate,and ammonium dihydrogen phosphate as matrix modifier to deduct the influence of background interference in the sample.Instrument conditions of graphite furnace atomic spectrometry were optimized for determination.Results The optimal matrix modifiers for determination of lead in tea samples were palladium chloride and magnesium nitrate,and for determination of cadmium in tea samples
ISSN:2095-0381