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Signal suppression/enhancement in high-performance liquid chromatography tandem mass spectrometry

The review discusses the pitfalls of the matrix effect in mass spectrometry detection hyphenated to liquid chromatography separation. Matrix effect heavily influences both qualitative and quantitative analyses, giving rise to suppression or enhancement of the signal.

出版机构:Elsevier Science

刊物名称:Journal of Chromatography A

出版时间:2010

ISSN:0021-9673

数据源:报刊文摘

Identification of new phase II metabolites of xanthohumol in rat in vivo biotransformation of hop extracts using high-performance liquid chromatography electrospray ionization tandem mass spectrometry

Polyphenolic compounds occurring in hop extracts and their phases I and II metabolites formed during in vivo rat biotransformation have been analyzed using HPLC/MS/MS with electrospray ionization (ESI). Two main groups of polyphenolics are present in the hops, i.e.

出版机构:Elsevier Science

刊物名称:Journal of Chromatography A

出版时间:2010

ISSN:0021-9673

数据源:报刊文摘

An improved liquid chromatography–tandem mass spectrometry method for the quantification of 4-aminobiphenyl DNA adducts in urinary bladder cells and tissues

Exposure to 4-aminobiphenyl (4-ABP), an environmental and tobacco smoke carcinogen that targets the bladder urothelium, leads to DNA adduct formation and cancer development .

出版机构:Elsevier Science

刊物名称:Journal of Chromatography A

出版时间:2010

ISSN:0021-9673

数据源:报刊文摘

Phenolic compound characterisation and antiproliferative activity of “Annurca” apple, a southern Italian cultivar

In Annurca apples, a southern Italian variety, polyphenols were studied. The phenolic composition of Annurca apple peel was determined by HPLC coupled with electrospray negative ionisation multistage ion trap mass spectrometry (HPLC/ESI?ITMS n ).

出版机构:Elsevier Science

刊物名称:Food Chemistry

出版时间:2010

ISSN:0308-8146

数据源:报刊文摘

Comparison on phenolic compounds in Vitis vinifera cv. Cabernet Sauvignon wines from five wine-growing regions in China

Phenolic compounds in the non-aged ?Cabernet Sauvignon? wines from five wine-growing regions in China were investigated using HPLC-MS. The wines from the regions that have similar ?terroir?

出版机构:Elsevier Science

刊物名称:Food Chemistry

出版时间:2011

ISSN:0308-8146

数据源:报刊文摘

Identification of endogenous and exogenous glucocorticoids by HPLC-MS in human urine

elective and sensitive screening method for identifying 20 endogenous and exogenous corticosteroids in human urine is presented. Analysis was performed by HPLC with a mass-selective ?ion trap? detector and spray ionization.

出版机构:Springer US

刊物名称:Pharmaceutical Chemistry Journal

出版时间:2010

ISSN:0091-150X

数据源:报刊文摘

Characterization of bioactive compounds from raw and ripe Mangifera indica L. peel extracts

Mango is one of the important tropical fruits in the world. As it is a seasonal fruit, it is processed for various products. During its processing, peel is one of the major byproducts, which is being wasted.

出版机构:Elsevier Science

刊物名称:Food and Chemical Toxicology

出版时间:2010

ISSN:0278-6915

数据源:报刊文摘

Comprehensive separation and identification of chemical constituents from Apocynum venetum leaves by high-performance counter-current chromatography and high performance liquid chromatography coupled with mass spectrometry

For HPCCC separation, four sets of solvent systems, n-hexane?ethyl acetate?acetonitrile?water (1.5:3.5:2:4.5, v:v:v:v), ethyl acetate?methanol?water (5:2:5, v:v:v) and n-butanol?methanol?water (5:1:5, v:v:v) were used for the one-step separation by four stages.

出版机构:Elsevier Science

刊物名称:Journal of Chromatography B, Analytical Technologies in the Biomedical and

出版时间:2010

ISSN:1570-0232

数据源:报刊文摘

Chromatographic techniques for the determination of alkyl-phenols, tocopherols and other minor polar compounds in raw and roasted cold pressed cashew nut oils

Anacardium occidentale belongs to the family Anacardiaceae and is principally grown in tropical America (Mexico, Peru, Brazil, etc.) and India. Cashew nuts contain low amounts of hydroxy alkyl phenols that come from an oily liquid present in their shell and that is known as cashew-nut shell liquid.

出版机构:Elsevier Science

刊物名称:Journal of Chromatography A

出版时间:2010

ISSN:0021-9673

数据源:报刊文摘

Structure elucidation of the thermal degradation products of the nucleotide cofactors NADH and NADPH by nano-ESI-FTICR-MS and HPLC-MS

Redox cofactors like NADH and NADPH are essential for the catalytic activity of several oxidoreductases. Here, we describe a comparative study of the thermal degradation products of both cofactors in the dry and liquid states.

出版机构:Springer Verlag

刊物名称:Analytical and Bioanalytical Chemistry

出版时间:2010

ISSN:1618-2642

数据源:报刊文摘