نتایج جستجو برای: determination of chemicals
تعداد نتایج: 21173121 فیلتر نتایج به سال:
Highly polar chemicals are mobile in an aqueous environment. Analytical methods for these compounds water lacking. A combined target/nontarget screening method based on hydrophilic interaction LC coupled to high-resolution MS was developed. Thirty-two highly (including melem and melam) can thus be quantitatively measured surface drinking water, the data screened unknown compounds. This is first...
MOTIVATION Chemical carcinogenicity is of primary interest, because it drives much of the current regulatory actions regarding new and existing chemicals, and its experimental determination involves time-consuming and expensive animal testing. Both academia and private companies are actively trying to develop SAR and QSAR models. This paper reviews the new Predictive Toxicology Challenge (PTC) ...
A new chemiluminescence method is proposed for the determination of sulfide in seawater based on the chemiluminescence reaction between sulfide and an acidic permanganate solution. 3-Cyclohexylaminopropanesulfonic acid was used as a chemiluminescence enhancer. By use of this method, 1-150 µM of sulfide could be determined in artificial seawater. The limit of detection was 0.17 µM sulfide. We in...
Background: Gas refining is a process in which workers are exposed to different chemicals. This study aimed to assess the health risks caused by exposure to these substances in order to determine hazardous jobs and to present controlling methods. Materials and Methods: This cross-sectional study was performed on the workers at gas refinery in 2015. The sample included all the staff in operat...
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