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| Improvement of Restoring Treatment during Determination of Nitrate in Vegetable |
| MA Yong-hua,CHEN Guo-you,DU Ying-qiu,SU Ping,LI Zhe-bin |
| Quality Inspection Center for Agricultural Products,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,Heilongjiang,China |
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Abstract Accurate and stable determination results of nitrate in vegetable can be obtained by optimizing restoring treatment during determination,and choosing cadmium column restoring method to replace cadmium grain in pre-treatment process of samples.The results indicated that the rate of nitrate restoring could reach 95.20 %-99.80 % and the accuracy of testing method was less than 1 %.At the same time,the cadmium column could be used repeatedly.This method could not only reduce the cost of testing,but also diminish environment pollution.
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Received: 20 April 2009
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