A new colorimetric reagent for zinc

✍ Scribed by John H. Yoe; Richard M. Rush

• Publisher: Elsevier Science
• Year: 1952
• Tongue: English
• Weight: 155 KB
• Volume: 6
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)86986-x

✦ Synopsis

During an investigation of a number of organic compounds for their reactivity towards inorganic ions, the compound o-[a-(2-hydroxy-5-sulfophenylazo)-benzilidcnehydrazino] benzoic acid was noted to give a dark blue precipitate with zinc and also reactions with copper, cobalt, and nickel. The heavy precipitate and intense color formed with zinc and the small number of other reacting ions prompted the authors to undertake an investigation of this compound as a possible colorimetric reagent for zinc. For a rcfcrence to this type of compound see WIZINGEH AND BIROS. The most suitable solvent for the reagent is a slightly ammoniacal, aqueous solution and the most convenient concentration is 0.002 31. This reagent solution 1944) III. 4 A. E. HARVEY AND D. L. MANNING,J.