爱社交
发表于 2025-3-28 15:09:22
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fiction
发表于 2025-3-28 20:59:12
Concentration and Identification of the Main Organic Micro-Pollutants Classes in Watersted by TLC arrangements, versus known standards. The biggest spots are scratched off for confirmation (bidimensional TLC)..The semi-quantitative evaluation allows an assesment of the potential toxicological risk (Quality index)..By this way, we can compare different waters and treatment efficienties.
Palatial
发表于 2025-3-29 02:07:43
Influence of Humus with Time on Organic Pollutants and Comparison of Two Analytical Methods for Anal as well as between compounds of the same class. None of the two analytical methods investigated were found feasible for the determination of the total amount of organic pollutants present in humus water.
领袖气质
发表于 2025-3-29 05:57:29
The Use of ECD and FID Fingerprint Techniques for the Evaluation of River Water Purification Contamisolvents of various polarity for the elution of organic matter from the XAD-2 resin, it is possible to obtain some additional information about the nature of eluted organic matter in water samples. For obtaining more volatile compounds from higher polar phases, organic matter is derivatized by acylation or silylation process.
制定法律
发表于 2025-3-29 10:24:30
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Stress-Fracture
发表于 2025-3-29 11:45:29
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V切开
发表于 2025-3-29 19:06:23
Recent Concepts in Sampling Methodologyare treated with such aspects as sensitivity, selectivity and convenience. Various small-volume sampling methods are exemplified for predetermined compounds. Results from comparative studies of different standard methods are shortly reviewed. Continuous automatic sampling by solvent extraction and b
HATCH
发表于 2025-3-29 21:38:56
A New Method for the Quantitative Analysis of Organochlorine Pesticides and Polychlorinated Biphenyl ppb level. A micro gas-phase extractor advantageously replaces other preconcentration and purification techniques. The extract is analysed by capillary gas chromatography without further enrichment. The recovery at the ppb level was nearly 100% for organochlorine pesticides and more than 80% for PC
考古学
发表于 2025-3-30 03:12:50
Concentration and Identification of the Main Organic Micro-Pollutants Classes in Waterstile compounds)..After choosing a list of organic compounds and chemical classes which acute or chronic toxicity is well known, an analytical scheme is presented to analyse 13 classes..After a first clean up, the total extract is separated in three fractions (acid, base and neutral). Each one is tes
积云
发表于 2025-3-30 04:41:37
Influence of Humus with Time on Organic Pollutants and Comparison of Two Analytical Methods for Analted. The feasibility of a liquid/liquid extraction method and a resin (XAD-2) adsorption method for analysing these pollutants in humus water has also been investigated. The influence of the aquatic humus on the organic pollutants was found to vary considerably between different classes of compounds