On February 18, 2020, Cuthbertson, Amy A.; Liberatore, Hannah K.; Kimura, Susana Y.; Allen, Joshua M.; Bensussan, Alena V.; Richardson, Susan D. published an article.Recommanded Product: 2-Chloroacetamide The title of the article was Trace Analysis of 61 Emerging Br-, Cl-, and I-DBPs: New Methods to Achieve Part-Per-Trillion Quantification in Drinking Water. And the article contained the following:
Disinfection byproducts (DBPs) are a ubiquitous source of chem. exposure in drinking H2O and were associated with serious health impacts in human epidemiol. studies. While toxicol. studies have pinpointed DBPs with the greatest toxic potency, anal. methods were lacking for quantifying complete classes of most toxic DBPs at sufficiently low quantification limits (ng/L). This new method reports the parts-per-trillion quantification for 61 toxicol. significant DBPs from 7 different chem. classes, including unregulated iodinated haloacetic acids (HAAs) and trihalomethanes (THMs), haloacetaldehydes, haloketones, haloacetonitriles, halonitromethanes, and haloacetamides, in addition to regulated HAAs and THMs. The final optimized method uses salt-assisted liquid-liquid extraction in a single extraction method for a wide range of DBPs, producing the lowest method detection limits to-date for many compounds, including highly toxic iodinated, brominated, and N-containing DBPs. Extracts were divided for the anal. of the HAAs (including iodinated HAAs) by diazomethane derivatization and anal. using a GC-triple quadrupole mass spectrometer with multiple reaction monitoring, resulting in higher signal-to-noise ratios, greater selectivity, and improved detection of these compounds The remaining DBPs were analyzed using a GC-single quadrupole mass spectrometer with selected ion monitoring, using a multimode inlet allowed for lower injection temperatures to allow the anal. of thermally labile DBPs. Finally, the use of a specialty-phase GC column (Restek Rtx-200) significantly improved peak shapes, which improved separations and lowered detection limits. Method detection limits for most DBPs were 15-100 ng/L, and relative standard deviations in tap H2O samples were mostly between 0.2 and 30%. DBP concentrations in real samples ranged from 40 to 17,760 ng/L for this study. The experimental process involved the reaction of 2-Chloroacetamide(cas: 79-07-2).Recommanded Product: 2-Chloroacetamide
The Article related to trace halo disinfection byproduct part per trillion drinking water, Water: Analysis and other aspects.Recommanded Product: 2-Chloroacetamide
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