BTANPACA的合成及与铁(Ⅲ)显色反应  

Synthesis of 2-(Benzothiazolylazo)-7-(4-nitro-phenylazo)-chromotropic Acid and Its Color Reaction with Iron(Ⅲ)

作　　者：张学军[1] 赵志刚 孙伶[1] 高春香[3] 

机构地区：[1]沈阳化工学院应用化学学院,辽宁沈阳110142 [2]锦化化工集团有限责任公司,辽宁葫芦岛125001 [3]沈阳化工研究院,辽宁沈阳110021

出　　处：《沈阳化工学院学报》2004年第1期70-72,共3页Journal of Shenyang Institute of Chemical Technolgy

摘　　要：　合成一种新的杂环不对称双偶氮变色酸试剂2 苯并噻唑偶氮 7 (4 硝基苯偶氮) 1,8 二羟基萘 3,6 二磺酸(简称BTANPACA).研究试剂的结构和吸收光谱,结果表明:在pH为5.8～6.4的缓冲介质中,Fe(Ⅲ)与BTANPACA及CTMAB形成1∶2∶1的三元配合物,其最大吸收波长为670nm,表观摩尔吸光系数ε=1.08×105L·mol-1·cm-1,在0～0.24mg/L范围内符合比耳定律,建立了测定石灰石和高炉渣中铁的新方法,取得满意的结果.A new reagent 2-(benzothiazolylazo)-7-(4-nitro-phenylazo)-chromotropic acid was synthesized. Its structure and acidity constants were studied spectrophotometrically. In a buffer solution KHC-8H-4O-4-NaOH, Fe(Ⅲ) reacts with the reagent and CTMAB to form a 1∶2∶1 ternary complex. The apparent molar absorptivity is 1.08×10+5 L·mol+{-1}·cm+{-1}.The proposed method with high sensitivity and selectivity has been applied to the analysis of iron in the limestone and slag with satisfactory results.

关 键 词：合成 2-苯并噻唑偶氮-7-(4-硝基苯偶氮)-1 8-二羟基萘-3 6-二磺酸 铁(Ⅲ) 分光光度法 

分 类 号：O657.32[理学—分析化学]