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A common germicide has been determined in multipurpose contact lens solutions by HPLC with evaporative light scattering detection at low ppm levels, say US researchers. [November 16, 2009] |
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The adulteration of bovine milk with soy milk can be detected by HPLC by looking for the presence of the soy sugar stachyose, which is absent from bovine milk, say Indian researchers. [November 2, 2009] |
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The in vitro elution of 2-hydroxyethyl methacrylate (HEMA) from two different adhesive systems, used in two dual polymerized resin cements for bonding of ceramic restoration, was determined by HPLC. [October 26, 2009] |
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The main components of vanilla pods have been measured by two research groups, both of which compared two HPLC methods with UV detection. The best sensitivity was achieved by ultra-high pressure LC with a reversed-phase column, which delivered detection limits at the picogram level. [October 19, 2009] |
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The antibiotics sulfamethoxazole and trimethoprim, which are administered in combination to cows, have been measured in bovine milk by HPLC with amperometric detection. A dual-column method enables untreated samples to be cleaned up online without damage to the column or the boron-doped diamond electrodes. [October 5, 2009] |
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A method for the analysis of free and total tryptophan in bee pollen and royal jelly employed HPLC with fluorescence detection following ultrasonic extraction and alkaline hydrolysis, respectively. [September 28, 2009] |
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The performance-enhancing drug testosterone undecanoate has been detected in human hair by LC/MS using atmospheric pressure chemical ionisation, at detection limits at least five-fold lower than published GC/MS methods. [September 21, 2009] |
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Red inks used for document seals can be differentiated by HPLC of the dye components and GC/MS of the volatiles, say Chinese researchers. The results will help to classify and date seals and uncover amended and forged documents. [September 7, 2009] |
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A reliable HPLC fingerprint method coupled with principal component analysis and similarity evaluation was developed to differentiate between the three medicines Pericarpium Citri Reticulatae, Pericarpium Citri Reticulatae Viride and Fructus Aurantii. [August 24, 2009] |
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Crude extracts of spices, fruits and other dietary plants reduced the amount of acrylamide produced in a model food system based on asparagine and glucose, representing carbohydrate-rich foods. [August 17, 2009] |
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The purine contents of alcoholic drinks on sale in Japan have been measured by HPLC to support a program for the lifestyle treatment of gout and hyperuricaemia, which are exacerbated by the conversion of purines to uric acid. [August 3, 2009] |
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SPE in combination with HPLC and fluorescence detection has been used for sensitive determination of six basic azaarenes in aviation kerosene (jet fuel). The presence of 7,8-benzoquinoline and dibenzo[a,j]acridine was confirmed in real samples. [July 27, 2009] |
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A novel sponge-like monolithic material with large pore sizes that is suitable for high-throughput analyses has been used in a column switching system for the preconcentration of bisphenol A in water. It can be used with high liquid flow rates and low back pressures. [July 20, 2009] |
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Melamine has been determined in the urine of Taiwanese children who may have consumed contaminated dairy products, using UPLC with a HILIC column coupled to a mass spectrometer. The technique also helped to establish background levels for melamine in unaffected children. [July 6, 2009] |
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After synthesis of JTV-519, S-107 and a putative metabolite, target compounds were characterized using NMR spectroscopy and electrospray high-resolution/high-accuracy mass spectrometry and the analytes were implemented in existing doping control screening procedures. [June 22, 2009] |
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An LC/MS procedure was used to measure levels of cocaine and its metabolites benzoylecgonine and ecgonine methyl ester in wastewater samples from 41 wastewater treatment plants in Belgium. [June 19, 2009] |
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Five MRI contrast agents based on gadolinium complexes have been determined individually in hospital wastewater, municipal sewage and treated wastewater. Their levels decreased throughout the water treatment cycle but they were still detectable in the final treated effluent. [June 15, 2009] |
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The biomarker sorbitol has been determined in the sciatic nerves and salivary glands of diabetic mice using anion exchange HPLC with pulsed amperometric detection. The method distinguished between diabetic and normal mice and is suitable for screening and monitoring diabetic neuropathy. [June 1, 2009] |
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An LC/MS procedure was used to measure levels of cocaine and its metabolites benzoylecgonine and ecgonine methyl ester in wastewater samples from 41 wastewater treatment plants in Belgium. [May 25, 2009] |
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Scientists in the UK have developed a new form of LC, named capillary action LC, which can be regarded as a hybrid of TLC and HPLC. The flow characteristics are similar to those of TLC and the separation efficiency is comparable to HPLC. [May 18, 2009] |
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