当代化工
噹代化工
당대화공
CONTEMPORARY CHEMICAL INDUSTRY
2013年
8期
1173-1174,1184
,共3页
石墨炉原子吸收光谱法%茶叶%消解方法%铅
石墨爐原子吸收光譜法%茶葉%消解方法%鉛
석묵로원자흡수광보법%다협%소해방법%연
Graphite furnace atomic absorption spectrometry%Tea%Digestion method%Lead
用石墨炉原子吸收光谱法测定5种不同方法消解的茶叶中铅的含量，发现不同的消解方法对茶叶中微量元素铅的测定结果影响很大，从中也探索出测量茶叶中铅最低损耗的最佳消解条件，就是采用硝酸-高氯酸微波消解方式。方法灵敏度高，加标回收率为97.94%~101.86%，适合于茶叶中铅的日常检测。
用石墨爐原子吸收光譜法測定5種不同方法消解的茶葉中鉛的含量，髮現不同的消解方法對茶葉中微量元素鉛的測定結果影響很大，從中也探索齣測量茶葉中鉛最低損耗的最佳消解條件，就是採用硝痠-高氯痠微波消解方式。方法靈敏度高，加標迴收率為97.94%~101.86%，適閤于茶葉中鉛的日常檢測。
용석묵로원자흡수광보법측정5충불동방법소해적다협중연적함량，발현불동적소해방법대다협중미량원소연적측정결과영향흔대，종중야탐색출측량다협중연최저손모적최가소해조건，취시채용초산-고록산미파소해방식。방법령민도고，가표회수솔위97.94%~101.86%，괄합우다협중연적일상검측。
Five different methods of digestion were used to determine the content of lead in tea with graphite furnace atomic absorption spectrometry. It’s found that various digestion procedures significantly influenced the testing results. Accordingly, an optimized digestion method, microwave-assisted nitric acid-perchloric acid digestion process was determined. The experiment results show that the method has high sensitivity;the recovery is 97.94%~101.86%;the method is suitable for daily determination of trace Pb in tea.
