Quantitative determination of the methyl ester of 2-chloro-3-(4-chlorophenyl)propionic acid in technical products and formulations by gas chromatography

✍ Scribed by Pavel Výboh; Milan Michálek; Bohumír Mrva; Cyril Ungvarský

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 537 KB
• Volume: 69
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(00)92898-x

✦ Synopsis

A method is described for the quantitative determination of the methyl ester of +chloro-3-(+chlorophenyl)propionic acid (common name chlorphenpropTmethyl), the active ingredient of herbicide formulations known under the trade-name Bidisin. The method is proposed for the determination of both technical and formulated products. On a poly neopentyl glycol succinate-phosphoric acid column it is possible to determine also the following by-products : free 2-chloro-3-(+chlorophenyl)propionic acid, its nitrile and its amide, and other impurities derived from raw materials and other reactions as well, either simultaneously or after modification of the operating conditions. The conditions for the qualitative analysis of the methyl ester of z-chloro-3-(+chlorophenyl)propionic acid samples and for the qualitative and quantitative analyses of the nitrile of 2-chloro-3-(+chlorophenyl)propionic acid (a by-product from the preparation of the methyl ester) are described.