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Evaluation of a liquid liquid extraction technique for water pollutants


, : Evaluation of a liquid liquid extraction technique for water pollutants. Journal of Chromatography 212(2): 187-198

A simple liquid-liquid extraction technique was evaluated and judged to be useful for semiquantitative determination of 37 organic pollutants present in water at concentrations of 50 .mu.g/l or better. Gas chromatographic analysis of hexane extracts showed detection limits of .ltoreq. 5 .mu.g/l for 30 compounds, recoveries of .gtoreq. 80% for 20 compounds and, generally, peak area precision of better than .+-. 5% for triplicate sample analyses. Storage of aqueous standard solutions at 4.degree. C for 4 wk did not significantly affect recovery values.

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Korhonen, Laura; Hansson, Inga; Kukkonen, Jyrki, P.; Brannval, Karin; Kobayashi, Masaaki; Takamatsu, Ken; Lindholm, Dan, 2005: Hippocalcin protects against caspase-12-induced and age-dependent neuronal degeneration. Hippocalcin is a neuronal calcium binding protein, but its physiological function in brain is unknown. We show here that hippocampal neurons from hippocalcin-deficient mice are more vulnerable to degeneration, particularly using thapsigargin, elev...

Del-Piero, F; Wilkins, Pa; Blomme, E; Mcbride, Ml; King, Jm, 1997: Mesocolic entrapment of a granulosa cell tumour inducing small colon impaction in an aged Thoroughbred mare. European journal of veterinary pathology: official journal of the European Society of Veterinary Pathology 3(1): 43-44

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Birnbaum, Davis; Hall, Theodore; Lee, Richard, 1961: The zinc content of rat sperm cells from ejaculate, vas, epididymis and testis. Zinc concentrations were measured by X-ray fluorescence in sperm cells taken from the reproductive tract of sacrificed animals. Dried spermatozoa from vas and epididymis contained about 1000 parts per million Zn, a value as high as that for ejacul...

Page, L. M., 1976: The modified midventral scales of percina osteichthyes percidae. The modified midventral scales on Percina males probably function to induce tactile stimulation of the female during spawning. The midbelly row of modified scales presumably evolved as a result of increased selective advantage of larger and more s...

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Decker, H., 1989: Some recent data on the occurrence and importance of plant parasitic nematodes in the German Democratic Republic. Recent work on plant-parasitic nematodes of crops in the German Democratic Republic is reviewed. Among the most important are Globodera spp. on potatoes, Heterodera avenae on cereals and H. schachtii on sugarbeet.

Burke, S.; Spooner, M. J. R.; Hegarty, P. K., 1997: Sensory testing of beers: An inter-laboratory sensory trial. An inter-collaborative tasting exercise was undertaken in which panels at seven different brewing companies compared the flavor of four beers in duplicate. Statistical analysis demonstrated that the results from individual panels were repeatable b...