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- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Analytical_Chemistry/2%3A_Analytical_Chemistry_2.0_(Harvey)/08%3A_Collecting_and_Preparing_Samples/8.07%3A_Liquid%E2%80%93Liquid_ExtractionsA liquid–liquid extraction is an important separation technique for environmental, clinical, and industrial laboratories. A standard environmental analytical method illustrates the importance of liqui...A liquid–liquid extraction is an important separation technique for environmental, clinical, and industrial laboratories. A standard environmental analytical method illustrates the importance of liquid–liquid extractions. Municipal water departments routinely monitor public water supplies for trihalomethanes because they are known or suspected carcinogens. Before their analysis by gas chromatography, trihalomethanes are separated from their aqueous matrix by
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/16%3A_Appendix/16.16%3A_Countercurrent_SeparationsIn 1949, Lyman Craig improved the separation of analytes with similar distribution ratios through countercurrent liquid-liquid extraction, offering a foundational understanding of chromatographic sepa...In 1949, Lyman Craig improved the separation of analytes with similar distribution ratios through countercurrent liquid-liquid extraction, offering a foundational understanding of chromatographic separations. Unlike sequential extractions, countercurrent extraction involves serial extraction of both sample and extracting phases. While outdated due to chromotography's efficiency, it remains instructive theoretically.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/07%3A_Obtaining_and_Preparing_Samples_for_Analysis/7.09%3A_ProblemsThe document addresses various analytical chemistry problems and exercises related to sampling, dissolution techniques, variance analysis, and liquid-liquid extraction efficiencies. It covers topics s...The document addresses various analytical chemistry problems and exercises related to sampling, dissolution techniques, variance analysis, and liquid-liquid extraction efficiencies. It covers topics such as monitoring environmental samples, error calculation, and comparing digestion methods. The document is instructional, prompting the reader to analyze given data, calculate specific values, and develop sampling strategies.
