Determination of Copper and Iron in Walnut Oil by MPT - AES

Journal of Liaoning Petrochemical University ›› 2007, Vol. 27 ›› Issue (1): 21-23.

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Determination of Copper and Iron in Walnut Oil by MPT - AES

School of Petrochemical Technology , Liaoning University o f Petroleum & Chemical Technology ,Fushun Liaoning 113001 , P. R. China

Received:2006-10-25 Published:2007-03-20 Online:2017-07-05

MPT - AES 法测定核桃油中铜和铁

邵　海, 宫晓杰, 李丽华, 张金生

辽宁石油化工大学石油化工学院, 辽宁抚顺113001

作者简介:邵海(1980 - ), 男, 浙江镇海县, 硕士。

Abstract

Abstract:

　 The analytical methods for copper and iron element in walnut oil were studied by microwave plasma torch atomic emission spectrometry (MPT - AES) using microwave plasma torch (MPT) as excitation light source , argon as supporting gas , and peneumatic nebulization sampling system. Some experimental parameters (including microwave power , carrier gas flow rate , supporting gas flow rate , oxygen shied gas flow rate , effect of acid, coexistence ions) were investigated and optimized. The linear range s o f copper and iron is 0. 05 ～ 100, 0. 1～ 100μg /m L, respectively . The detection limits is 5. 3, 22. 1ng /m L, respectively . The recoveries are both in the range of 96. 4 %～ 102. 2% and the RSD of the method is less than 3. 2%.

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Key words: 　Microwave extraction , , Microwave coupled plasma , , Atomic emission spectrometry , , Walnut oil , , Copper , , Iron

摘要：

　用微波等离子炬(MPT)作激发光源, 氩气为载气, 用气动雾化进样, 研究了微波等离子体炬原子发射光谱法(MPT - AES)测定核桃油中铜和铁元素。考察并优化了微波功率、工作气流量、载气流量、氧屏蔽气流量、酸效应、共存离子等实验参数。测定铜和铁的检出线分别为5. 3 , 22. 1 ng / mL 。RSD均小于3. 2 %, 线性范围分别为0. 05～ 100 , 0. 1 ～ 100μg /m L, 加标回收率均在96. 4 %～ 102. 2 %。

关键词: 微波萃取, 　微波等离子体炬, 　原子发射光谱法, , 核桃油, 　铜, 　铁

CLC Number:

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SHAO Hai,GONG Xiao - jie,LI Li - hua,ZHANG Jin - sheng. Determination of Copper and Iron in Walnut Oil by MPT - AES[J]. Journal of Liaoning Petrochemical University, 2007, 27(1): 21-23.

邵　海, 宫晓杰, 李丽华, 张金生. MPT - AES 法测定核桃油中铜和铁[J]. 辽宁石油化工大学学报, 2007, 27(1): 21-23.

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Determination of Copper and Iron in Walnut Oil by MPT - AES

MPT - AES 法测定核桃油中铜和铁

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