Spectrophotometric determination of cobalt in steel with 2-(2-thiazolylazo)-4-methyl-5-(sulfomethylamino) benzoic acid (TAMSMB)
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説明
A method for the determination of cobalt in steel with 2-(2-thi-azolylazo)-4-methyl-5-(sulfomethylamino) benzoic acid (TAMSMB) is proposed. Iron and manganese were previously removed by the extraction from 7M HCl into methyl isobutyl ketone and with an anion exchange column (Diaion SA # 100), respectively. The results of the analyses of steel samples were in good agreement with those by atomic absorption spectrophotometry. This method was compared with the methods using the highly sensitive reagents for cobalt; 4-(5-chloro-2-pyridylazo)-1,3-diaminobenzene(5-Cl-PADAB), 5-(3,5-dibromo-2-pyridylazo)-2,4-diaminotoluene (3,5-diBr-PADAT), 2-(5-bromo-2-pyridylazo)-5-(diethylamino) phenol(5-Br-PADAP), 2-(2-py-ridylazo)-4-methyl-5-(ethylamino) phenol (EAPAC), 2-(3,5-dibromo-2-pyridylazo)-5-(dimethylamino) benzoic acid (3,5-di-Br-PAMB), 3-(2-thiazolylazo)-2,6-diaminotoluene (2,6-TADAT), and 2-nitroso-5-dimethylaminophenol (Nitroso-DMAP).
収録刊行物
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- Mikrochimica Acta
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Mikrochimica Acta 80 139-149, 1983-01-01
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