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首页> 外文期刊>Journal of the Brazilian Chemical Society >Methylene Violet 3 RAX Dye as a New Reagent for the Determination of Nitrite in Cured Meats and Vegetables
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Methylene Violet 3 RAX Dye as a New Reagent for the Determination of Nitrite in Cured Meats and Vegetables

机译：亚甲基紫罗兰3 rax染料作为腌制肉类和蔬菜中亚硝酸盐的新试剂

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>In this contribution we propose, for the first time, the use of Methylene Violet 3 RAX dye for the detection and determination of nitrite in cured meats and vegetables. Quantification is based on the decrease in absorbance of the dye, which is proportional to the nitrite concentration. The proposed method presents linear response (r 0.99) in the range from 1.8 to 9 ?μmol L-1 of nitrite, with a limit of detection of 0.14 ?μmol L-1. Satisfactory accuracy with the official Association of Official Agricultural Chemists (AOAC) method was achieved, and the method was successfully applied to a wide range of cured meats and vegetables. The proposed method offers similar or superior performance to other optical methods used for the determination of nitrite in different matrices, with advantage in terms of reduction of chemical waste for each analysis, by minimizing amounts of reagents and products.
机译：>在这一贡献中我们提出的是，首次使用亚甲基紫3六rax染料进行腌制肉类和蔬菜中的亚硝酸盐。定量基于染料吸光度的降低，其与亚硝酸盐浓度成比例。所提出的方法在亚硝酸盐的1.8至9Ω·μmolL-1的范围内呈现线性响应（R> 0.99），其检测限为0.14ΩμmolL-1。达到了官方农业化学家（AOAC）方法官方协会的令人满意的准确性，该方法成功地应用于各种愈合的肉类和蔬菜。所提出的方法提供了与用于测定不同矩阵中亚硝酸盐的其他光学方法的类似或优异的性能，通过最小化试剂和产品的量，在减少各分析的化学废物的减少方面。

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