| 8-喹啉偶氮显色剂QADCB的合成及其分析性能的研究 |
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| 引用本文： | 朱彬,刘恒椽. 8-喹啉偶氮显色剂QADCB的合成及其分析性能的研究[J]. 理化检验(化学分册), 2005, 41(6): 409-411,414 |
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| 作者姓名： | 朱彬 刘恒椽 |
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| 作者单位： | 1. 遵义师范学院化学系,遵义,563002
2. 华东师范大学化学系,上海,200062 |
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| 基金项目： | 遵义师范学院科研基金资助项目(2005012) |
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| 摘 要： | 报道了8-喹啉偶氮显色剂2-(8-喹啉偶氮)-5-二羧甲氨基苯甲酸(QADCB)的合成、提纯与鉴定,研究了其与Co(Ⅱ)、Ni(Ⅱ)、Fe(Ⅲ)的显色反应,对QADCB与Co(Ⅱ)的显色反应作了研究。在pH5.9的缓冲体系中,试剂与Co(Ⅱ)形成棕红色配合物,其最大吸收波长位于650nm,表观摩尔吸光系数为4.2×104L.mol-1.cm-1,钴量在0~20μg/25mL范围内符合比耳定律。方法简便、快速,选择性较好,已用于纯铜、维生素B12中微量钴的测定,结果满意。
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| 关 键 词： | 光度法 2-（8-喹啉偶氮）-5-二羧甲氨基苯甲酸（QADCB） 显色反应 钴 |
| 文章编号： | 1001-4020(2005)06-0409-03 |
STUDY ON THE SYNTHESIS AND ANALYTICAL PROPERTIES OF THE NEW REAGENT 2-(8-QUINOLYLAZO)-5-DICARBOXYMETHYLAMINO BENZOIC ACID (QADCB) |
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| ZHU Bin,Liu Heng-chuan. STUDY ON THE SYNTHESIS AND ANALYTICAL PROPERTIES OF THE NEW REAGENT 2-(8-QUINOLYLAZO)-5-DICARBOXYMETHYLAMINO BENZOIC ACID (QADCB)[J]. Physical Testing and Chemical Analysis Part B:Chemical Analgsis, 2005, 41(6): 409-411,414 |
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| Authors: | ZHU Bin Liu Heng-chuan |
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| Abstract: | This paper reports the synthesis, purification and identification of the new reagent 2-(8-quinolylazo)-5-dicarboxymethylamino benzoic acid(QADCB). The color reactions of the reagent with cobalt() nickel() iron() have been studied, in which reaction of QADCB with cobalt() has been studied systematically. In a medium of pH 5.9 QADCB reacts with cobalt() to form a brown complex, exhibiting maximum absorbance at 650nm, the molar absorptivity is 4.210~4Lmol~(-1)cm~(-1). Beers Law is obeyed for 020 g of cobalt in 25 mL of solution. The proposed method has relative high sensitivity and has been successfully applied to the spectrophotometric determination of microamounts of cobalt in the practical sample such as VB_(12) pure copper with satisfactory results. |
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| Keywords: | Photometry 2-(8-Quinolylazo)-5-dicarboxymethylamino benzoic acid(QADCB) Color reaction Cobalt |
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