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Position: Home > Articles > Determination of formaldehyde in water-soaked foodstuffs by catalytic spectrophotometry with chromazurol S-KBrO_3 system Guangdong Agricultural Sciences 2013,40 (20) 116-118

铬天青S-溴酸钾体系催化光度法测定水发食品中甲醛

作  者:
刘细祥;兰翠玲;覃艳艳;何柳媚
单  位:
百色学院化学与生命科学系
关键词:
催化光度法;铬天青S;甲醛;溴酸钾
摘  要:
在H2SO4介质中,甲醛对溴酸钾氧化铬天青S的褪色反应有催化作用,据此建立了催化光度法测定甲醛的新方法。该方法的线性范围为0.12~1.01 mg/L,检出限为0.012 mg/L。该方法用于腐竹、木耳和八渡笋等水发食品中甲醛的测定,测定结果的相对标准偏差RSD均小于5%(n=7),回收率为96.2%~103.8%,可满足食品中甲醛的测定要求。
译  名:
Determination of formaldehyde in water-soaked foodstuffs by catalytic spectrophotometry with chromazurol S-KBrO_3 system
作  者:
LIU Xi-xiang;LAN Cui-ling;QIN Yan-yan;HE Liu-mei;Department of Chemistry and Life Science,Baise College;
关键词:
catalytic spectrophotometry;;chromazurol S;;formaldehyde;;potassium bromate
摘  要:
A new catalytic spectrophotometry on determination of formaldehyde has been developed, which was based on the catalytic effect of formaldehyde on the discoloring oxidation reaction between potassium bromate and chromazurol S in H2SO4medium. The linear range of determination was 0.12 ~1.01 mg/L and the detection limit was 0.012 mg/L. This method has been applied to determine formaldehyde in water-soaked foodstuffs such as dried beancurd stick, black fungus, bamboo shoot and RSD was less than 5%(n =7),recovery was between 96.2%~103.8%. This method can satisfy the requirements of determinating formaldehyde in food.

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