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首页> 外文期刊>Journal of the Brazilian Chemical Society >Spectrophotometric determination of catecholamines based on their oxidation reaction followed by coupling with 4-aminobenzoic acid
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Spectrophotometric determination of catecholamines based on their oxidation reaction followed by coupling with 4-aminobenzoic acid

机译:邻苯二酚氧化反应-4-氨基苯甲酸偶合分光光度法测定儿茶酚胺

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摘要

A sensitive and simple spectrophotometric method for the determination of dopamine, methyldopa, levodopa and catechole in either pure form, pharmaceutical formulations and in water is described. The method is based on their oxidation reaction with periodate followed by oxidative coupling with 4-aminobenzoic acid at pH 4 leading to the formation of colored products. The calibration graph was linear in the range of 0.20-18.00 mg L-1, 0.10-20.00 mg L-1, 0.10-20.00 mg L-1 and 0.10-13.00 mg L-1 for dopamine, methyldopa, levodopa and catechole, respectively. Analytical data for determination of the pure compound is presented together with the application of the proposed method to the analysis of some pharmaceutical formulations and water samples. The results compared favorably with reported methods.
机译:描述了一种灵敏且简单的分光光度法,用于测定纯制剂,药物制剂和水中的多巴胺,甲基多巴,左旋多巴和猫胆。该方法基于它们与高碘酸盐的氧化反应,然后与pH为4的4-氨基苯甲酸进行氧化偶联,从而导致形成有色产物。对于多巴胺,甲基多巴,左旋多巴和破洞,校准曲线分别在0.20-18.00 mg L-1、0.10-20.00 mg L-1、0.10-20.00 mg L-1和0.10-13.00 mg L-1范围内呈线性。给出了用于测定纯化合物的分析数据,以及所提出的方法在某些药物制剂和水样分析中的应用。结果与已报道的方法相比具有优势。

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