分光光度法测定丁腈的含量及其应用

A. Sahu, Shraddha Pandey, Vindhya Patel, R. Khatoon, M. Nirmal, Kalpana Wani, D. Sahu, J. Goswami, C. Bhatt, Geetanjali Deshlahare, H. Sharma, Manish Kumar Raia, Joyce Rai
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引用次数: 0

摘要

用分光光度法测定杀菌剂菌丁腈的方法是将菌丁腈溴化生成二溴型菌丁腈,二溴型菌丁腈与碘化钾-碘酸钾混合物在白结晶紫(LCV)存在下反应生成紫色络合物。该配合物在590 nm处显示出最大吸光度。在最终溶液体积为10ml的0.5-4.0µg浓度范围内,遵循Beer定律。通过对含有10µg丁腈的溶液在10ml的最终溶液中进行7天的重复分析来评估再现性。着色体系的摩尔吸光度为1.29×105 L mol- ccm -1,桑德尔灵敏度为1.03×10-3µg cm-2。吸光度值的标准偏差为±0.00652,相对标准差为1.14%。所提出的方法不受其他毒物的干扰。优化了分析参数,并将该方法应用于水、土壤和食品样品中菌丁腈的测定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Spectrophotometric Determination of Myclobutanil and it’s Applications
A new spectrophotometric method has been developed for determination of fungicide myclobutanil is based on the bromination of myclobutanil to form dibromo myclobutanil which react with Potassium iodide-Potassium iodate mixture in the presence of leucocrystal voilet (LCV) to form a violet colored complex. The complex shows maximum absorbance at 590 nm. Beer’s law obeyed over the concentration range of 0.5-4.0 µg in final solution volume of 10 mL. The reproducibility assessed by carrying out seven days replicate analysis of a solution containing 10 µg of myclobutanil in a final solution of 10 mL. The molar absorptivity of the coloured system is 1.29×105 L mol-1cm-1 and Sandell’s sensitivity is 1.03×10-3 µg cm-2. The standard deviation and relative standard deviation for the absorbance value were found to be ±0.00652 and 1.14% respectively. The proposed method is free from the interference of other toxicants. The analytical parameters were optimized and the method was applied to the determination of myclobutanil in water, soil and food samples.
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