Rapid detection technology of copper ion in preserved egg pickling liquid

doi:10.14088/j.cnki.issn0439-8114.2021.22.034

Abstract

Abstract: A rapid method for determination of copper in preserved egg pickling liquid by bis-cyclohexanone oxalyldihydrazone （BCO） coupled with UV-Vis spectrophotometric detection was established. The reaction conditions of copper ion with BCO were optimized. Under the optimized conditions, copper ion presented a good linear relationship in the concentration range of 0~2.56 mg/L with R² 0.999 5. The recoveries of copper ion spiked at 0.12, 0.24, 0.48, 0.72 g/L were between 97.9% and 103.4%, and inter-day and intra-day relarive standard deviation were lower than 3.17%, demonstrating good accuracy and precision of the proposed method. Finally, the proposed method was applied to monitoring the copper sulfate in the actual preserved egg pickling liquid. The established method provides a powerful tool for the real-time monitoring of copper ion during the preservation of preserved eggs.

Key words: bis-cyclohexanone oxalyldihydrazone, spectrophotometric method, preserved egg pickling liquid, high content copper

CLC Number:

O657

ZHANG Hui-xian, CUI Wen-wen, WANG Ming-rui, YAO Jing-jing, DU Jin-ping, SUN Jing, ZHANG Hao. Rapid detection technology of copper ion in preserved egg pickling liquid[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(22): 160-163.

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