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This review emphasizes the development of novel stationary phases and their implementation in microchannels in lab-on-a-chip systems with reference to recent instrumental advances. [August 23, 2010] |
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The presence of DNA in ancient bone specimens can be inferred from the extent of amino acid racemisation, say Italian scientists, who used HPLC with fluorescence detection to measure the D/L ratios of alanine and aspartic acid. [August 16, 2010] |
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The antioxidant levels in complex plant matrices have been determined by two HPLC methods employing post-column addition of reagents. The first involved a cupric ion reagent that is reduced by the antioxidants whereas the second is an improved and refined method based on the DPPH radical. [August 2, 2010] |
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An HPLC-DAD-APCI/MSD method was developed to detect phenolic compounds in the leaf extracts of 14 Ericaceae plants used by indigenous North Americans to treat degenerative diseases including type 2 diabetes. [July 26, 2010] |
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The illicit presence of four synthetic prescription drugs in dietary supplements intended to improve male sexual potency has been determined by Chinese scientists using a simple but effective HPLC/MS procedure valid down to 1 ppm. [July 19, 2010] |
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Mangrove and medlar leaves have been used as passive samplers to measure local concentrations of PAHs by HPLC with fluorescence detection. The miniaturised method effectively provides an infinite number of sampling points for assessing local and regional atmospheric contamination. [July 5, 2010] |
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This review focuses on the use of LC-MS/MS in clinical laboratories to assist with the diagnosis of diverse groups of endocrine and metabolic diseases. [June 28, 2010] |
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HILIC performed far better than ion pairing HPLC in conjunction with mass spectrometric detection for the analysis of two aminoglycoside antibiotics in milk, say Greek researchers, improving the sensitivity by at least 80-fold. [June 21, 2010] |
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The flavonoids in yellow lake pigments and some of the related plants from which they are derived have been identified by LC/MS, permitting the plant provenances of pigments in The Scream and the Reclining Tiger to be attributed. [June 7, 2010] |
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An HPLC-electrospray ionization-QTOF MS method that fulfills the degree of certainty required in a court of law has been developed for the analysis of both the organic and inorganic constituents of black powder substitutes. [May 24, 2010] |
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A single HPLC/MS method has been developed for measuring a set of 13 antibiotics from several classes in distillers grain, a by-product of the ethanol fuel industry bound for use as an animal feed. [May 17, 2010] |
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The historical record of PAH pollution in Europe over the past 300 years has been derived from ice cores drilled from the Alps, using a sequential melting system and HPLC measurement. [May 3, 2010] |
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Free access to 3 papers including "Annual banned-substance review: analytical approaches in human sports drug testing" [registered users only] Register here first, then you can access for free the full content of all 2009 and 2010 articles published within this exciting new journal, including these top read reviews... [April 23, 2010] |
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HPLC with electrochemical detection and minimal sample preparation have been used to determine three marker dyes in fuels, which are added for identification and to prevent fraud. [April 19, 2010] |
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A series of colourless flavonoids have been identified in the bee pollen from a common weed using LC/MS combined with photodiode array detection, which will be useful for the quality control of dietary supplements based on this product. [April 5, 2010] |
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A simple and specific analytical for the determination of sulforaphane in broccoli by-products includes optimization of the conversion of glucoraphanin to sulforaphane. [March 29, 2010] |
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A sequence optimization strategy combining an artificial neural network and a chromatographic response function for chromatographic separation in reversed-phase high-performance liquid chromatography has been proposed. [March 22, 2010] |
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Five stationary phases have been compared for the HPLC separation of nucleosides and mononucleotides without using ion pairing, to help determine the umami factors in a series of edible wild mushrooms. [March 15, 2010] |
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The amount of sheep's milk fraudulently present in cheeses made primarily from cows' or goats' milk can be estimated by liquid chromatography-tandem mass spectrometry of casein fragments, say Italian researchers. [March 1, 2010] |
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This review will provide a brief overview of acetylcholine biosynthesis, microdialysis technique and liquid chromatography-mass spectrometry, which is being used to quantitate extracellular levels of acetylcholine. [February 22, 2010] |
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