离子色谱法测定茶叶中的硝酸盐和亚硝酸盐

doi:10.13305/j.cnki.jts.2012.02.002

Abstract

Abstract: A method for simultaneous determination of nitrite and nitrate in tea was established. Tea samples were pre-treated by ultrasonic extraction, PVPP and solid-phase extraction cartridge clean up, and the resulting supernatants were injected into a high-capacity anion exchange column with suppressed conductivity detection. The results showed that the recovery nitrate was 88.6%~107.5% and nitrite was 89.3%~101.2%. The relative standard deviations (RSD) were 1.67% and 1.13% respectively. It was concluded that the advantages of the method are simple operation, fast and high accuracy.

Key words: ion chromatography, tea, nitrate, nitrite

CLC Number:

TS272
O657.7

CAI Hui-mei, HOU Ru-yan, GAO Zhu, PENG Chuan-yi, WAN Xiao-chun. Determination of Nitrate and Nitrite in Tea by Ion Chromatography[J]. Journal of Tea Science, 2012, 32(2): 95-99.

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Determination of Nitrate and Nitrite in Tea by Ion Chromatography

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