✦ LIBER ✦

Syntheses of Three New Benzoic Acid-Type Thiazolylazo Reagents and Their Application to Spectrophotometric Determination of Microamounts of Nickel

✍ Scribed by Xuezhong Fan; Chunhua Zhu

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 122 KB
Volume: 59
Category: Article
ISSN: 0026-265X
DOI: 10.1006/mchj.1997.1546

No coin nor oath required. For personal study only.

✦ Synopsis

Three new thiazolylazo chromogenic reagents of the benzoic acid type-2-[2-(6-methylbenzothiazolyl)azo]-5-(N-methyl-N-sulfomethyl)aminobenzoic acid (6-Me-BTAMSB), 2-[2-(6methylbenzothiazolyl)azo]-5-(N-ethyl-N-sulfomethyl)aminobenzoic acid (6-Me-BTAESB), and 2-[2-(6-methylbenzothiazolyl)azo]-5-(N-ethyl-N-carboxylmethyl)aminobenzoic acid (6-Me-BTAECB)were synthesized. Their spectrophotometric characteristics were studied in detail. In weak acid medium, they react with nickel(II) in the presence of sodium dodecyl sulfate to form blue-violet 2:1 complexes, the absorption maxima of which are at 642, 620, and 625 nm with apparent molar absorptivities of 8.81 1 10 4 , 8.22 1 10 4 , and 1.03 1 10 5 liters mol 01 cm 01 , respectively. Beer's law is obeyed over the ranges 0-7, 0-6, and 0-12 mg/25 ml nickel, respectively. The proposed method was applied to the determination of nickel in aluminum alloys and alloy steels with satisfactory results.

📜 SIMILAR VOLUMES

Characterization of Three New Phosphonic

Characterization of Three New Phosphonic (Arsonic) Acid Type Thiazolylazo Reagents and Application to Spectrophotometric Determination of Microamounts of Palladium

✍ F.L. Zhang; B.C. Wu; H.C. Liu; C. Wu 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 304 KB

Three new thiazolylazo chromogenic reagents of phosphonic and arsonic acid types, namely 2-(2-benzothiazolylazo)-5-sulfomethylamino-4-tolylphosphonic acid (BTASTP), 2-(2-benzothiazolylazo)-5-sulfomethylamino-4-chlorobenzenephosphonic acid (BTASCP), and 2-(2-benzothiazolylazo)-5-sulfomethylamino-4-to

Synthesis and Characterization of 2-(2-T

Synthesis and Characterization of 2-(2-Thiazolylazo)-5-[(N,N-dicarboxymethyl)amino]Benzoic Acid and Its Application to Spectrophotometry Determination of Microamounts of Palladium in Catalysts

✍ Lihong Wang; Fulong Tang 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 96 KB

A new water-soluble chromogenic reagent, namely 2-(2-thiazolylazo)-5-[(N,N-dicarboxymethyl) amino]benzoic acid (TADCAB), is described in this paper. Its synthesis and spectrophotometric behaviors have been studied thoroughly. Its color reactions with various metal ions were investigated. The acid di