Hypopnea
发表于 2025-3-30 11:35:38
Determination of Organometallic Compounds in the Aquatic Environmentgenic origin. Methyl-compounds of tin and gallium have been detected in natural waters in the ppt-range and are likely of natural origin. The analysis of these compounds at trace levels involves sample enrichment and chromatographic separation techniques followed by specific detection. The environme
讽刺滑稽戏剧
发表于 2025-3-30 15:12:39
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Trigger-Point
发表于 2025-3-30 18:07:23
FAB Mass Spectrometric Study of the Non Volatile Organic Fraction in Raw and Drinking Water Extractsere performed using HPLC fractionation, FAB mass spectrometry and combined FAB-CID-MIKE. Also LC/MS has been evaluated. Among identified non volatile organics present in water, some of them not reported previously, there are a wide range of nonionic and anionic surfactants and polyglycols. The ident
filicide
发表于 2025-3-31 00:15:09
Pollution Conditions of the Aquifer beneath a Plant Producing Alkyd Resinsving from natural oils, polyhydric alcohols, styrene, toluene diisocyanate, dicyclopentadiene, glycol esters and ethers, and various solvents. Furthermore, esterification reactions form volatile products (aldehydes, ketones, heterocyclic oxygenated compounds) which pass into the plant’s gaseous and
翻动
发表于 2025-3-31 01:21:55
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slow-wave-sleep
发表于 2025-3-31 08:37:09
Improvement in Estimation of Polyaromatic Hydrocarbons in Seawater, Marine Sediments and Organisms bne, n-hexane or methanol. The extract is afterwards concentrated and cleaned by means of an alumina column. Eluation of the retained fluorescent material is performed by using n-pentane and benzene mixture or methylene chloride. After the fluorescence measurement of the cleaned extracts has been mad
他日关税重重
发表于 2025-3-31 09:39:48
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组装
发表于 2025-3-31 17:22:29
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整洁
发表于 2025-3-31 18:43:37
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CHOIR
发表于 2025-3-31 22:08:24
Evaluation of Sample Preparation Procedures for the Determination of Organic Micropollutants in Rivewere spiked and the wet, chemically dried or freeze-dried materials were extracted using methods such as Soxhlet extraction,ultrasonic agitation, shaking and stirring with solvent and steam distillation. The extractions were performed with both methylene chloride and cyclohexane on different sedimen