Add time:08/20/2019         Source:sciencedirect.com

The determination of phenoxy ester herbicides was carried out by high-performance liquid (HPLC) and gas chromatography (GC) and their identification by GC—MS spectrometry. Standards of herbicide esters were obtained from the appropriate acid and a suitable alcohol, mainly 2-butoxyethyl, isooctyl or isobutyl alcohol, using acetyl chloride as a catalyst. The mixture was heated at 100°C for 1 h, after cooling 2 ml of acetate buffer (pH 4.6) were added and then the mixture was diluted to volume with methanol. Good ester conversion (>95%) was achieved. The phenoxy esters were analysed by reversed-phase HPLC on a Spherisorb ODS-2 (5-μm) column with acetonitrile—water (85:15) as mobile phase at a flow-rate of 1 ml/min and UV detection at 280 nm. GC was performed on a BP-5 capillary column with helium as carrier gas (10 ml/min) and flame ionization detection. Esters were identified by GC—ion trap detection on a BP-1 capillary column. Several mixtures of phenoxy ester herbicides in formulations were analysed using the proposed methods and good agreement between the HPLC and GC results was obtained.

We also recommend Trading Suppliers and Manufacturers of MCPA-BUTOXYETHYL ESTER (cas 19480-43-4). Pls Click Website Link as below: cas 19480-43-4 suppliers