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Solid-Phase Extraction and HPLC Assay of Nicotine and Cotinine in Plasma and Brain

Sequential solid-phase extraction on silica columns followed by extraction using octadecyl (C18) columns resulted in mean percent recovery (n = 5) of 51 ? 5, 64 ? 10, and 52 ? 10% for NIC, COT, and phenylimidazole (PI), respectively, in spiked 1-mL serum samples. Recovery (mean ?

出版机构:Informa Healthcare

刊物名称:Toxicology Mechanisms and Methods

出版时间:2002

ISSN:1537-6516

数据源:报刊文摘

Identification of Human Urine Stains by HPLC Analysis of 17-Ketosteroid Conjugates

Samples of urine stains were extracted with borate buffer solution (pH 9.3) and the extracts were applied onto a Sep-Pak tC18 cartridge. The analytes were eluted from the cartridge with methanol.

出版机构:Blackwell Publishing Ltd

刊物名称:Journal of Forensic Sciences

出版时间:2002

ISSN:0022-1198

数据源:报刊文摘

Changes in Composition of Ballpoint Pen Inks on Aging in Darkness

A method for comparison of the relative age of ink entries written by the same ballpoint pen on documents stored in darkness is presented. Inks were extracted from the document and analyzed by HPLC (high performance liquid chromatography).

出版机构:Blackwell Publishing Ltd

刊物名称:Journal of Forensic Sciences

出版时间:2002

ISSN:0022-1198

数据源:报刊文摘

STUDY OF MECHANISM OF ENANTIOSEPARATION. III. THE INFLUENCE OF CARBOHYDRATE MOIETIES OF TEICOPLANIN-BONDED CHIRAL STATIONARY PHASE ON THE SEPARATION OF SOME DERIVATES OF PHENYLCARBAMIC ACID

Enantiomeric separation of alkoxysubstituted esters of phenylcarbamic acid (local anesthetic drugs) is carried out using high performance liquid chromatography (HPLC) with two chiral stationary phases. The teicoplanin chiral stationary phase?

出版机构:Taylor & Francis

刊物名称:Journal of Liquid Chromatography & Related Technologies

出版时间:2002

ISSN:1082-6076

数据源:报刊文摘

SYNTHESIS, PURIFICATION, AND STABILITY OF β-DIKETONATE EUROPIUM CHELATE REAGENT, DETERMINED BY RP-HPLC

Various estimation conditions concerned with a europium chelate labeling agent, 4-(1,1,1,2,2-pentafluoro-3,5-dioxo-pentyl)-[1,11'-biphenyl]-sulfonyl chloride (PDB-SCl), was studied, by using reversed-phase HPLC-time-resolved fluorescence detector system.

出版机构:Taylor & Francis

刊物名称:Journal of Liquid Chromatography & Related Technologies

出版时间:2002

ISSN:1082-6076

数据源:报刊文摘

SELECTIVE ASSAYS FOR QUANTITATION OF TENOXICAM IN PRESENCE OF ITS PHOTODEGRADATION PRODUCTS

The stability indicating capability of the respective assays is proven with sample solutions forcedly degraded by artificial irradiation from a xenon source. The chromatograms and the electropherogram of the resulting solution, show tenoxicam well resolved from the degradation products.

出版机构:Taylor & Francis

刊物名称:Journal of Liquid Chromatography & Related Technologies

出版时间:2002

ISSN:1082-6076

数据源:报刊文摘

Instrumentation Note: A SIMPLE, INEXPENSIVE, AND PRECISE SPECTROPHOTOMETRIC METHOD FOR EVALUATING THE CONCENTRATION OF ASCORBIC ACID IN CSF SAMPLES: DATA FROM DIFFERENT NEUROLOGICAL PATHOLOGIES

method is presented for evaluating the concentration of ascorbic acid in ?l samples of cerebrospinal fluid (CSF) with just ultraviolet (UV) scanning in the 220-300 nm range.

出版机构:Informa Healthcare

刊物名称:International Journal of Neuroscience

出版时间:2002

ISSN:0020-7454

数据源:报刊文摘

The Antioxidant Activity of Regularly Consumed Fruit and Vegetables Reflects their Phenolic and Vitamin C Composition

Recent studies are emphasising the importance and putative modes of action of specific flavonoids as bioactive components of the diet in in vivo and in vitro models.

出版机构:Informa Healthcare

刊物名称:Free Radical Research

出版时间:2002

ISSN:1071-5762

数据源:报刊文摘

Comparison of Results from Different Laboratories in Measuring 8-oxo-2'-deoxyguanosine in Synthetic Oligonucleotides

The European Standards Committee on Oxidative DNA Damage (ESCODD) was set up in 1997 to resolve methodological problems and to reach agreement on the basal level of 8-oxo-2'-deoxyguanosine (8-oxodG) in biological samples.

出版机构:Informa Healthcare

刊物名称:Free Radical Research

出版时间:2002

ISSN:1071-5762

数据源:报刊文摘

Determination of ivermectin and moxidecin residues in bovine milk and examination of the effects of these residues on acid fermentation of milk

Ivermectin (IVM) and moxidectin (MXD) are broad-spectrum antiparasitic drugs not approved for use in dairy animals, although their use in dairy sheep, goats and cattle nevertheless occurs in many parts of the world.

出版机构:Taylor & Francis

刊物名称:Food Additives & Contaminants

出版时间:2002

ISSN:0265-203X

数据源:报刊文摘