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《Journal of Heilongjiang Bayi Agricultural University》 2017-04
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Detection of the Total Amount of Methenamine in Rice Products

Sun Jitao;Ruan Changqing;Niu Rui;Liu Wenjing;Zhang Xuelu;Li Fang;Zhang Aiwu;Zhang Dongjie;College of Food Science,Heilongjiang Bayi Agricultural University;  
The detection of the total content of methenamine in rice products was established by using HPLC wavelength program method. Sample solutions were extracted under ultrasonic condition with acetonitrile,and centrifuged,the supernatant was concentrated by rotary evaporator. The aqueous solution of acetonitrile-ammonium acetate was added to the mobile phase and carried on C18 column,then the programmed wavelength ultraviolet detection was performed to determine the total content of methenamine.The results showed that the concentration range was 0.00-200.00 μg·m L~(-1)and 0.00-20.00 μg·m L~(-1) for methenamine and formaldehyde-2,4-dinitrobenzene hydrazone,respectively. The detection limit of methenamine was 0.016 mg·kg~(-1),the quantitation limit was 0.053 mg·kg~(-1).The detection limit of formaldehyde-2,4-dinitrobenzene hydrazone was 0.026 mg·kg~(-1),the quantitation limit was 0.087 mg·kg~(-1). The recoveries range of sample added standards was 84.84%-92.18% with RSD of 1.70%-3.48%.
【Key Words】: HPLC wavelength program method methenamine Formaldehyde-2 4-dinitrobenzene hydrazone rice products
【Fund】: 黑龙江省研究生创新科研项目(YJS(X2015-Y51);; 黑龙江省高校“农产品加工与质量安全”创新团队项目(2014TD006)
【CateGory Index】: TS210.7
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