Desorption atmospheric pressure photoionization (DAPPI) is an ambient ionization technique for mass spectrometry that uses hot solvent vapor for desorption in conjunction with photoionization. Ambient Ionization techniques allow for direct analysis of samples without pretreatment. [1] .

2015年7月26日 · Desorption atmospheric pressure photoionization (DAPPI) is an ambient mass spectrometry (MS) technique that is suitable for the direct analysis of polar and nonpolar compounds from a variety of surfaces. Conventional DAPPI uses reflection geometry, but here transmission mode (TM)-DAPPI is introduced for fast and easy analysis of liquid samples.

解吸大气压光电离（dappi）允许在露天环境中进行表面分析，因此是直接耦合薄层色谱（tlc）和质谱（ms）的合适方法。 在这里，DAPPI-MS能够从TLC和高效薄层色谱（HPTLC）板离子化和检测脂质，即胆固醇，三酰基甘油，1,2-二醇二酯，蜡酯，胆固醇酯和烃类在MS和MS 2 ...

Desorption atmospheric photoionization (DAPPI) is an ambient mass spectrometry (MS) technique that can be used to analyze both polar and nonpolar compounds. Here, the coupling of DAPPI with traveling wave ion mobility-mass spectrometry (TWIM-MS) and application to analysis of food, multivitamin, and pharmaceutical products is described.

2007年10月15日 · An ambient ionization technique for mass spectrometry, desorption atmospheric pressure photoionization (DAPPI), is presented, and its application to the rapid analysis of compounds of various polarities on surfaces is demonstrated. The DAPPI technique relies on a heated nebulizer microchip deliverin …

2007年9月6日 · The DAPPI technique relies on a heated nebulizer microchip delivering a heated jet of vaporized solvent, e.g., toluene, and a photoionization lamp emitting 10-eV photons. The solvent jet is directed toward sample spots on a surface, causing the …

2019年11月16日 · Desorption atmospheric photoionization (DAPPI) is an ambient mass spectrometry (MS) technique that can be used to analyze both polar and nonpolar compounds. Here, the coupling of DAPPI with traveling wave ion …

2016年12月2日 · Desorption atmospheric pressure photoionization (DAPPI) allows surface analysis in the open atmosphere and is thus an appropriate method for the direct coupling of thin-layer chromatography (TLC) and mass spectrometry (MS).

2010年12月3日 · Desorption atmospheric pressure photoionization (DAPPI) is an ambient ionization technique for mass spectrometry (MS) that can be used to ionize polar as well as neutral and completely non-polar analytes. In this study polydimethylsiloxane (PDMS) was used as a solid phase extraction sorbent for DAPPI-MS analysis.

2011年8月5日 · In DAPPI, a heated jet of mixed nebulizer gas and spray solvent vapor desorbs solid analytes from the surface, after which the ionization of the analytes takes place through photoionization and gas-phase ion–molecule reactions similar to dopant-assisted APPI [27].