最灵敏且专属性好的分析方法是:在酸性溶液中,醛酮类物质与涂渍于硅胶上的2,4-二硝基苯肼(DNPH)反应,生成DNPH衍生产物苯腙,用专用洗脱液洗涤后HPLC进行分离。 金畔生物推出一些列基于上述原理的DNPH吸附柱和HPLC分离柱及相应的洗脱液。 采样时将DNPH硅胶吸附管与一真空泵连接,使大气通过一含碘化钾的萃取柱,用以...
DNPH柱前衍生RP-HPLC测定含氟乳液聚合物中微量甲醛
This study\ndescribes an inter-comparison of the VOC data, and the derived uncertainty\nestimates, measured with three independent techniques (PTR-MS,\nproton-transfer-reaction mass spectrometry; GC-FID-MS,\ngas chromatography with flame-ionization and mass spectrometric detection;\...
Summary This appl ication note describes a very fast method for identifying six DNPH derivatizedarbonyls in a mixture using the KNAUER PLATINblue UHPLC system.The stationary phase BlueOrchid C18 A was used to separate the carbonyl mixture. Short columns with smal l particles are the most suitable...
Carbonyls Carbonyl compounds Deep-frying fat HPLC DNPH derivativesIn current analytical practice, simple methods are required for assessing the quality of a deep-frying fat after some time of use. Therefore, a new procedure was developed for the fast and selective determination of higher carbonyl ...
Restek RT-33088 SV Stock Standard m-tolualdehyde-2,4-DNPH 1mL 100ug/mL Acetonit的详细介绍 Restek公司是一个来自从美国宾州州大学色谱研究开发部门发展出来的技术型公司。有25年的历史。除了在全世界共有销售代9096 处以外,Restek在法国、德国、爱尔兰、苏格兰/日本设有分公司。在多个色谱柱专业研究和生产公司...
Performance of a 2,4-DNPH coated annular denuder/HPLC system for formaldehyde monitoring in air. Chromatographia 49 (3-4), 161-165.Possanzini, M. and Di Palo, V., Performance of a 2,4-DNPH coated annular denuder/HPLC system for formaldehyde monitoring in air, Chromatographia, 49, 161, ...
This study describes an inter-comparison of the VOC data, and the derived uncertainty estimates, measured with three independent techniques (PTR-MS, proton-transfer-reaction mass spectrometry; GC-FID-MS, gas chromatography with flame-ionization and mass spectrometric detection; and DNPH-HPLC, 2,4-...
DNPH cartridge / HPLC analysis - a still relevant method for OVOC monitoring: a contribution to the assessment of uncertainty in current atmospheric VOC measurementsSalameh, ThérèseSauvage, StéphaneGaudion, VincentLéonardis, ThierryFronval, Isabelle...
L. Determination of formaldehyde by HPLC as the DNPH derivative following high-volume air sampling onto bisulfite-coated cellulose filters. Atmos. EnViron. 1992, 26A, 819-825.DE ANDRADE J B,TANNER R L. Determination of formaldehyde by HPLC as the DNPH derivative following high-volume air ...