Energy and chemicals

Samples containing buprenorphine and derivatives were extracted using Agilent sample prep and analyzed by gas chromatography using an Agilent J&W HP-5 column. Published by Elsevier B. V. An empirical study on the selection of analytes and corresponding cutoffs for immunoassay and GC–MS in a two-step test strategy—buprenorphine example Analyst, 9, 1848-1856 (2009) Meng-Yan Wu et al. Tags HP-5, clinical research Abstract Standard solutions of buprenorphine (B) and three metabolites; (ii) immunoassay (IA) reagents designed for the analysis of B and/or its metabolites; and (iii) clinical urine specimens collected from patients (under B-treatment), constitute the B-System for fundamental study of parameters critical to the two-step test strategy, an analytical approach designed for a high-volume testing environment. The cross-reacting characteristics of IA reagents were examined using standard solutions of B and its metabolites. Resulting data were used as the basis for selecting target analytes suitable for the preliminary and the confirmatory test steps. Test data derived from IA and GC–MS analysis of clinical urine specimens (with natural distribution of B and its metabolites) were quantitatively correlated. Correlation parameters were examined: (i) to verify whether the analyte-pair targeted by the IA and GC–MS test steps has been properly selected; and (ii) to decide on appropriate cutoffs for the two test steps. In conclusion, this study has demonstrated that the most effective analyte(s) that should be targeted in the GC–MS determination step vary with the IA selected in the preliminary test step. All analytes that generate significant responses to the IA reagent should be targeted in the GC–MS test step. © The Royal Society of Chemistry 2009.Standard solutions of buprenorphine (B) and three metabolites; (ii) immunoassay (IA) reagents designed for the analysis of B and/or its metabolites; and (iii) clinical urine specimens collected from patients (under B-treatment), constitute the B-System for fundamental study of parameters critical to the two-step test strategy, an analytical approach designed for a high-volume testing environment. The cross-reacting characteristics of IA reagents were examined using standard solutions of B and its metabolites. Resulting data were used as the basis for selecting target analytes suitable for the preliminary and the confirmatory test steps. Test data derived from IA and GC–MS analysis of clinical urine specimens (with natural distribution of B and its metabolites) were quantitatively correlated. Correlation parameters were examined: (i) to verify whether the analyte-pair targeted by the IA and GC–MS test steps has been properly selected; and (ii) to decide on appropriate cutoffs for the two test steps. In conclusion, this study has demonstrated that the most effective analyte(s) that should be targeted in the GC–MS determination step vary with the IA selected in the preliminary test step. All analytes that generate significant responses to the IA reagent should be targeted in the GC–MS test step. © The Royal Society of Chemistry 2009. Energy and chemicals Deacidification of Pistacia chinensis Oil as a promising non-edible feedstock for biodiesel production in China Energies, 5, 2759-2770 (2012) Shenjun Qin et al. Tags HP-5, 6890N GC, 5973 MSD, energy and chemicals, biofuels and alternative energy Abstract Pistacia chinensis seed oil is proposed as a promising non-edible feedstock for biodiesel production. Different extraction methods were tested and compared to obtain crude oil from the seed of Pistacia chinensis, along with various deacidification measures of refined oil. The biodiesel was produced through catalysis of sodium hydroxide (NaOH) and potassium hydroxide (KOH). The results showed that the acid value of Pistacia chinensis oil was successfully reduced to 0.23 mg KOH/g when it was extracted using ethanol. Consequently, the biodiesel product gave a high yield beyond 96.0%. The transesterification catalysed by KOH was also more complete. Fourier transform infrared (FTIR) spectroscopy was used to monitor the transesterification reaction. Analyses by gas chromatography-mass spectrometry (GC-MS) and gas chromatography with a flame ionisation detector (GC-FID) certified that the Pistacia chinensis biodiesel mainly consisted of C18 fatty acid methyl esters (81.07%) with a high percentage of methyl oleate. Furthermore, the measured fuel properties of the biodiesel met the required standards for fuel use. In conclusion, the Pistacia chinensis biodiesel is a qualified and feasible substitute for fossil diesel. © 2012 the Authors. Food testing and agriculture A rapid multi-residue method for the determination of pesticide residues in choi sum, yardlong beans and aubergines Food Chemistry, 131, 611-616 (2012) Lian-Kuet Chai et al. Tags Ultra 1, DB-1701, HP-5, 6890 GC, food testing and agriculture, pesticides Abstract In an investigation of pesticide residues in choi sum, yardlong beans and aubergines, an Agilent 6890 GC equipped with a Flame Photometric detector and Agilent J&W HP-5 and DB-1701 columns were used for the determination of organophosphate pesticides. The same instrument but with ECD and an Agilent J&W Ultra 1 column was used for the analysis of organochlorine and pyrethroid pesticides. Published by Elsevier B. V.In an investigation of pesticide residues in choi sum, yardlong beans and aubergines, an Agilent 6890 GC equipped with a Flame Photometric detector and Agilent J&W HP-5 and DB-1701 columns were used for the determination of organophosphate pesticides. The same instrument but with ECD and an Agilent J&W Ultra 1 column was used for the analysis of organochlorine and pyrethroid pesticides. Published by Elsevier B. V. Rapid analysis of cyclamate in foods and beverages by gas chromatography-electron capture detector (GC-ECD) Food Chemistry, 134, 2424-2429 (2012) Shengbing Yu et al. Tags HP-5, DB-5ms, DB-WAX, 6890N GC, 7683B Autosampler, food testing and agriculture, food processing and packaging Abstract Several Agilent J&W GC columns, fitted to an Agilent 6890N/5973 MSD, were used in a successful investigation of artificial sweeteners in food. Published by Elsevier B. V. Quantitative Determination for the Major Volatile Organic Compounds of Tuber melanosporum Fermentation System by Distillation–solid-Phase Extraction–Gas Chromatography Food Analytical Methods, 5, 651-658 (2012) Ya-Jie Tang et al. Tags HP-35, HP-5, DB-225, food testing and agriculture Abstract The major volatile organic compounds of truffle were analyzed using an Agilent J&W GC columns. Published by Springer. Monitoring Study of Pesticide Residues in Cereals and Foodstuff from Poland Polish Journal of Environmental Studies, 21, 1703-1712 (2012) B. Łozowicka et al. Tags HP-35, HP-5, 7890A GC, food testing and agriculture, pesticides Abstract After extraction from cereals, pesticides were analyzed on an Agilent J&W HP-5 GC column in an Agilent 6890 GC. Confirmation was obtained using an Agilent J&W DB-35 column.After extraction from cereals, pesticides were analyzed on an Agilent J&W HP-5 GC column in an Agilent 6890 GC. Confirmation was obtained using an Agilent J&W DB-35 column. Analytical Techniques of Non Dioxin-Like Polychlorinated Biphenyls Journal of the National Food Reference Laboratory, 1, 45-52 (2010) Gül Çelik Çakiroğullari, Devrim Kiliç Tags CP-Sil 5/C18 CB for PCB, CP-Sil 8 CB for PCB, DB-5, DB-5ms, HP-5, HP-5ms, food testing and agriculture, persistent organic pollutants Abstract The authors describe a range of analytical techniques for the detection of PCBs, using Agilent J&W GC columns. Published by the Turkish National Food Reference Laboratory. A study on the lipid components of rice in relation to palatability and storage Journal of the Korean Society for Applied Biological Chemistry, 55, 515-521 (2012) Mi-Ra Yoon et al. Tags DB-225, HP-5, 6890 GC, 5973 MSD, food testing and agriculture, food processing and packaging Abstract The concentrations of squalene and phytosterols in stored rice were determined by GC/MS with an Agilent 6890/5973 MSD, equipped with Agilent J&W GC columns. Published by Springer.The concentrations of squalene and phytosterols in stored rice were determined by GC/MS with an Agilent 6890/5973 MSD, equipped with Agilent J&W GC columns. Published by Springer. Development of a simple extraction and oxidation procedure for the residue analysis of imidacloprid and its metabolites in lettuce using gas chromatography Food Chemistry, 148, 402-409 (2014) Ah-Young Ko et al. Tags HP-5, HP-5ms UI, 7890A GC, 7683B Autosampler, 7000A Triple Quadrupole GC/MS, food testing and agriculture, pesticides Abstract The authors determined the total residues of imidacloprid and its metabolites (containing the 6chloropicolyl moiety) in lettuce using GC-μECD and GC/MSD with Agilent J&W GC columns and in Agilent GC/MS instruments. Published by Elsevier B. V.The authors determined the total residues of imidacloprid and its metabolites (containing the 6chloropicolyl moiety) in lettuce using GC-μECD and GC/MSD with Agilent J&W GC columns and in Agilent GC/MS instruments. Published by Elsevier B. V. Forensics and toxicology Analytical methods for abused drugs in hair and their applications Analytical and Bioanalytical Chemistry, 397, 1039-1067 (2010) Mitsuhiro Wada et al. Tags DB-5, DB-5ms, HP-5, HP-5ms, CP-Sil 5 CB, ZORBAX SB-Phenyl, ZORBAX Eclipse XDB-C18, Bond Elut Certify, forensics and toxicology, criminalistics Abstract A comprehensive review of drug extraction methods described the use of many Agilent products, including Bond Elut Certify for sample extraction, Agilent J&W DB-5, DB-5ms, HP-5, HP-5ms, and CP-Sil 5 CB GC columns, and Agilent ZORBAX StableBond SB-Phenyl and ZORBAX Eclipse XDBC18 LC columns. Published by Springer.