{"id":10007,"date":"2022-10-13T03:03:51","date_gmt":"2022-10-12T19:03:51","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=10007"},"modified":"2022-10-13T03:03:51","modified_gmt":"2022-10-12T19:03:51","slug":"zhakupbekova-arays-team-published-research-in-environmental-science-and-pollution-research-in-2022-cas-930-36-9","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=10007","title":{"rendered":"Zhakupbekova, Aray&#8217;s team published research in Environmental Science and Pollution Research in 2022 | CAS: 930-36-9"},"content":{"rendered":"<p><a href=\"https:\/\/www.ambeed.com\/products\/930-36-9.html\">Product Details of 930-36-9<\/a>On May 31, 2022, Zhakupbekova, Aray; Baimatova, Nassiba; Psillakis, Elefteria; Kenessov, Bulat published an article in Environmental Science and Pollution Research. The article was \u300aQuantification of trace transformation products of rocket fuel unsymmetrical dimethylhydrazine in sand using vacuum-assisted headspace solid-phase microextraction\u300b. The article mentions the following:<\/p>\n<p>Quantification of unsym. dimethylhydrazine transformation products in solid samples is an important stage in monitoring of environmental pollution caused by heavy rockets launches. The new method for simultaneous quantification of unsym. dimethylhydrazine transformation products in sand samples using vacuum-assisted headspace solid-phase microextraction without addition of water followed by gas chromatog.-mass spectrometry is proposed. Decreasing air evacuation time from 120 to 20 s at 23\u00b0C resulted in increased responses of analytes by 25-46% and allowed obtaining similar responses as after evacuation at -30\u00b0C. The best combination of responses of analytes and their relative standard deviations (RSDs) was achieved after air evacuation of a sample (m = 1.00 g) for 20 s at 23\u00b0C, incubation for 30 min at 40\u00b0C, and 30-min extraction at 40\u00b0C by Carboxen\/polydimethylsiloxane (Car\/PDMS) fiber. The method was validated in terms of linearity (R2=0.9912-0.9938), limits of detection (0.035 to 3.6 ng g-1), limits of quantification (0.12-12 ng g-1), recovery (84-97% with RSDs 1-11%), repeatability (RSDs 3-9%), and reproducibility (RSDs 7-11%). It has a number of major advantages over existing methods based on headspace solid-phase microextraction-lower detection limits, better accuracy and precision at similar or lower cost of sample preparation The developed method was successfully applied for studying losses of analytes from open vials with model sand spiked with unsym. dimethylhydrazine transformation products. It can be recommended for anal. of trace concentrations of unsym. dimethylhydrazine transformation products when studying their transformation, migration and distribution in contaminated sand. After reading the article, we found that the author used 1-Methylpyrazole(cas: 930-36-9<a href=\"https:\/\/www.ambeed.com\/products\/930-36-9.html\">Product Details of 930-36-9<\/a>)<\/p>\n<p>1-Methylpyrazole(cas: 930-36-9) belongs to pyrazoles. Pyrazoles and their related multiring analogs are common elements of a wide variety of bioactive compounds. These ring structures are rare in nature. A consequence of this is that they have previously been thought to be poor moieties to include in potential new drugs. <a href=\"https:\/\/www.ambeed.com\/products\/930-36-9.html\">Product Details of 930-36-9<\/a><\/p>\n<p>Referemce:<br \/><a href=\"https:\/\/en.wikipedia.org\/wiki\/Pyrazole\">Pyrazole &#8211; Wikipedia<\/a>,<br \/><a href=\"https:\/\/www.sciencedirect.com\/topics\/chemistry\/pyrazoles\">Pyrazoles &#8211; an overview | ScienceDirect Topics<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1-Methylpyrazole(cas: 930-36-9) belongs to pyrazoles. Pyrazoles and their related multiring analogs are common elements of a wide variety of bioactive compounds. These ring structures are rare in nature. A consequence of this is that they have previously been thought to be poor moieties to include in potential new drugs. <a href=\"https:\/\/www.ambeed.com\/products\/930-36-9.html\">Product Details of 930-36-9<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[245,131],"tags":[743],"class_list":["post-10007","post","type-post","status-publish","format-standard","hentry","category-930-36-9","category-pyrazoles-derivatives","tag-0-100"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Zhakupbekova, Aray&#039;s team published research in Environmental Science and Pollution Research in 2022 | CAS: 930-36-9 | pyrazoles-derivatives<\/title>\n<meta name=\"description\" content=\"Product Details of 930-36-9On May 31, 2022, Zhakupbekova, Aray; Baimatova, Nassiba; Psillakis, Elefteria; Kenessov, Bulat published an article in Environmental Science and Pollution Research. The article was \u300aQuantification of trace transformation products of rocket fuel unsymmetrical dimethylhydrazine in sand using vacuum-assisted headspace solid-phase microextraction\u300b. The article mentions the following:\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pyrazoles-derivatives.com\/?p=10007\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Zhakupbekova, Aray&#039;s team published research in Environmental Science and Pollution Research in 2022 | CAS: 930-36-9 | pyrazoles-derivatives\" \/>\n<meta property=\"og:description\" content=\"Product Details of 930-36-9On May 31, 2022, Zhakupbekova, Aray; Baimatova, Nassiba; Psillakis, Elefteria; Kenessov, Bulat published an article in Environmental Science and Pollution Research. The article was \u300aQuantification of trace transformation products of rocket fuel unsymmetrical dimethylhydrazine in sand using vacuum-assisted headspace solid-phase microextraction\u300b. 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