| 罗丹明6G比色法同时测定污染蔬菜中的铅和镉 |
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| 引用本文： | 龚小勇,黎其万,王继良,和丽忠.罗丹明6G比色法同时测定污染蔬菜中的铅和镉[J].现代食品科技,2012,28(3):354-356. |
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| 作者姓名： | 龚小勇 黎其万 王继良 和丽忠 |
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| 作者单位： | 1. 昆明医学院药学院,云南昆明,650031
2. 云南省农业科学院质量标准与检测技术研究所,云南昆明,650223 |
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| 基金项目： | 云南省科技创新强省计划项目 |
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| 摘 要： | 硝酸(1+11)浸提干燥蔬菜样品,利用罗丹明6G直接水相比色同时测量样品中的Pb、Cd.实验确定了Pb在0.1～1.0 μg/mL、Cd在0.01～0.1 μg/mL浓度范围内符合线性相关关系,显色体系最佳pH=5.0.硝酸浸提法检测了六种蔬菜样品,与湿消解法相比Pb、Cd平均提取率分别为97.47％、96.82％;平均RSD＜5;平均加标回收率为102.6％、101.2％,结果令人满意.
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| 关 键 词： | 罗丹明6G 比色法 铅、镉 蔬菜 |
| 收稿时间： | 2011/11/24 0:00:00 |
Rapid Determination of Lead and Cadmium in Pollute Vegetable by Rhodamine 6G Colorimetry |
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| GONG Xiao-yong,LI Qi-wan,WANG Ji-liang and HE Li-zhong.Rapid Determination of Lead and Cadmium in Pollute Vegetable by Rhodamine 6G Colorimetry[J].Modern Food Science & Technology,2012,28(3):354-356. |
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| Authors: | GONG Xiao-yong LI Qi-wan WANG Ji-liang and HE Li-zhong |
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| Affiliation: | 1.Faculty of Pharmaceutical Sciences,Kunming Medical College,Kunming 650031,China)(2.Quality Standard and Testing Technology Institute,Yunnan Academy of Agricultural Sciences,Kunming 650223,China) |
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| Abstract: | Dry vegetable was extracted by nitric acid(1+11) and the content of lead and cadmium in sample could be simultaneously got by rhodamine 6G aqueous phase colorimetric test.The results confirmed that lead and cadmium had good linear relation in concentration range of 0.1~1.0 μg/mL and 0.01~0.1 μg/mL,respectively.The best pH value for the colorimetric system is 5.0.Compared with wet extraction,the average extraction efficiency of nitric acid for lead and cadmium were 97.47% and 96.82%,and average RSD was less than 5.Average recoveries of standard addition in six samples were 102.6% and 101.2%. |
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| Keywords: | rhodamine 6G colorimetry lead and cadmium vegetable |
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