This paper reports the non-targeted analysis of unknown volatile components in scented stationery based on headspace gas chromatography-Orbitrap high-resolution mass spectrometry. The volatiles released from the samples (22 scented erasers and 17 scented pens) under specific headspace conditions were ...
- 《Journal of Chromatography B》 被引量: 53发表: 2006年 Data handling in HPLC-diode array UV-spectrometry The mathematical resolution of overlapped chromatographic peaks obtained in HPLC with a diode array UV detector has received considerable attention recentl... BGM Vandeginste,G Kateman,JK ...
(MB diet) for 3 weeks. Fresh samples of their faeces were collected and then treated according to the protocol below. The extracted fractions were first analysed by UV–Vis spectrometry with subsequent detailed study by fluorimetry, liquid chromatography–UV–mass spectrometry (LC–UV–MS), ...
peaks. Here we provide the means to conduct these searches using code developed in Python and match scores computed using the cosine dot product (https://github.com/USEPA/CFM-ID_generation_of_CompTox_Chemicals_Dashboard_Structures_Paper). The matched chemicals, along with their fragments and the...
Journal of Chromatography A, 1067 (2005) 127–134 Matching unknown empirical formulas to chemical structure using LC/MS TOF accurate mass and database searching: example of unknown pesticides on tomato skins E. Michael Thurman ∗ , Imma Ferrer, Amadeo Rodriguez Fern´ andez-Alba ...
在之前的一篇博客中,我讨论了对可能出现在液相色谱分离中的外来峰的担忧。虽然可能有很多与测试物质无关的峰的来源,但你如何决定哪些是合法的,哪些是质量差的表现?哪些是无害的,哪些是危险的?哪些是预期的,哪些是来自污染或制造过程中的变化?本博客将考虑可能存在于您的产品中,但在您的分析中没有显示的杂质。
In Ion exchange chromatography, what determines whether or not or how strongly an analyte adsorbs to the stationary phase? Explain why some substances move up the stationary phase in a chromatographic experiment faster than others. Descri...
The distances between the peaks of an isotopic pattern can, for instance, be derived in a good approximation from mean compositions of the substances of a chemical class. During curve fitting by a mathematical optimization process, in the simplest case only the position coordinate and the width ...
Suggest methods other than melting point and chromatography. How to determine if a pair of substances are likely to form a homogeneous solution? Explain in details why the melting point sample should be funky powdered and packed tightly ...
Brain samples from wild otters found dead in Schleswig-Holstein, Germany, were screened for selected ASMs via high-performance liquid chromatography (HPLC). Unknown peaks were additionally measured via mass spectrometry (MS). Deceased individuals under human care, known to have been euthanized using ...