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首页> 外文期刊>Asian Journal of Chemistry: An International Quarterly Research Journal of Chemistry >Derivative spectrophotometric determination of trace manganese after separation and preconcentration with the ion pair of 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol and ammonium tetraphenylborate
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Derivative spectrophotometric determination of trace manganese after separation and preconcentration with the ion pair of 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol and ammonium tetraphenylborate

机译：2-（5-溴-2-吡啶偶氮）-5-二乙氨基苯酚和四苯基硼酸铵离子对分离富集-导数光度法测定痕量锰

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摘要

Manganese is quantitatively retained on 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP)-ammonium tetraphenylborate with microcrystalline naphthalene or by a column method in the pH range 7.5-10.5 from a large volume of aqueous solutions of various samples. After filtration, the solid mass consisting of the manganese complex and naphthalene was dissolved with 5 mL of dimethylformamide and the metal was determined by third derivative spectrophotometry. Manganese complex can alternative vely be quantitatively adsorbed on ammonium tetraphenylborate-naphthalene adsorbent packed in a column and determined similarly. About 0.1 #mu#g of manganese can be concentrated in a column from 500 mL of aqueous sample, where its concentration is as low as 0.2 ng/mL. The interference of a large number of anions and cations has been studied and the optimized conditions developed were utilized for the trace determination of manganese in various samples.
机译：用微晶萘或通过柱法从大体积的锰中将锰定量保留在2-（5-溴-2-吡啶偶氮）-5-二乙基氨基苯酚（5-Br-PADAP）-四苯基硼酸铵上。各种样品的水溶液。过滤后，将由锰配合物和萘组成的固体物质用5mL二甲基甲酰胺溶解，并通过三阶导数分光光度法测定金属。锰配合物也可以定量地吸附在填充在色谱柱中的四苯基硼酸铵-萘吸附剂上，并进行类似的测定。可以在500 mL含水样品中的柱中浓缩约0.1＃mu＃g锰，其浓度低至0.2 ng / mL。对大量阴离子和阳离子的干扰进行了研究，并将开发的优化条件用于痕量测定各种样品中的锰。

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