| 催化分光光度法测定重油中的微量钴 |
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| 引用本文： | 刘立行,范佩霞.催化分光光度法测定重油中的微量钴[J].石油化工,1996(4). |
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| 作者姓名： | 刘立行 范佩霞 |
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| 作者单位： | 抚顺石油学院应用化学系，抚顺进出口商品检验局 |
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| 摘 要： | 在氨水介质中，Ｃｏ（Ⅱ）能催化二苯偶氮碳酰肼被溶解氧氧化而褪色。本文进一步考察了此方法的测定条件及二氨替吡啉甲烷萃取Ｃｏ（Ⅱ）的回收率，并应用该法成功地测定了原油及润滑油中的钴。钴的回收率９３．０％─９９．３％，摩尔吸收系数１．１×１０６Ｌ·ｍｏｌ（－１）·ｃｍ（－１），线性范围０．０５─０．４μｇ／２６ｍｌ，检测限０．０８μｇ／２６ｍｌ，相对标准偏差２．２％─４．４％。方法准确、灵敏、易行。
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| 关 键 词： | 催化分光光度法，微量钴，重油 |
Determination of Trace Cobalt in Heavy Oil by Catalytic Spectrophotometry |
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| Liu Lihang.Determination of Trace Cobalt in Heavy Oil by Catalytic Spectrophotometry[J].Petrochemical Technology,1996(4). |
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| Authors: | Liu Lihang |
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| Abstract: | The method is based on the principle that Co(Ⅱ) in NH3·H2O medium can catalyze the decoloration reaction of diphenylcarbazone through oxidation by air1]. We have applied this method successfully to determine trace cobalt in crude oil and lube oil. The recovery of Co(Ⅱ)is 93. 0%-99. 3 %. The molar absorptivity and linear range are respectively 1. 1 ×106 L·mol-1·cm-1 and 0.05-0. 4μg/26ml. The detection limit is 0. 08μg/26ml. This method has the advantages of accuracy,sensitivity and simplicity. |
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| Keywords: | atalytic spectrophotometry micro cobalt heavy oil |
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