Abstract：
:Organic compounds extracted into metered dose inhalers (MDIs) from the rubber components of the metering valve are of increasing interest in the development of these formulations. Polycyclic aromatic hydrocarbons (PAHs) are a class of extractable organic compounds whose source is the carbon black commonly used as a reinforcing agent in rubber. The analytical method for PAHs described in this report employs "cold filtration" to remove the suspended drug substance and excipients, and gas chromatography/mass spectrometry (GC/MS) for separation and detection of individual PAHs. After filtration, stable isotope labelled analogues of target PAHs are spiked into the drug product to act as internal standards, correcting for recovery (termed "isotope dilution GC/MS"). Validation of the method was accomplished with respect to linearity, precision, limit of detection/quantitation, selectivity and ruggedness. Application to a variety of MDI drug product formulations revealed that certain PAHs are present at the ng/inhaler level.
journal_name
J Pharm Biomed Analjournal_title
Journal of pharmaceutical and biomedical analysisauthors
Norwood DL,Prime D,Downey BP,Creasey J,Sethi SK,Haywood Pdoi
10.1016/0731-7085(95)01273-nsubject
Has Abstractpub_date
1995-03-01 00:00:00pages
293-304issue
3eissn
0731-7085issn
1873-264Xpii
0731-7085(95)01273-Njournal_volume
13pub_type
杂志文章abstract：:Polygonum jucundum is a traditional Chinese medicine used for the treatment of diseases. The major bioactive compound in the ethanol extract of P. jucundum is 2α-hydroxyl-3β-angeloylcinnamolide (HAC), a drimane-type sesquiterpenoid, which possesses anti-inflammatory activities. The purpose of this study was to investi...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2013.04.033
更新日期：2013-09-01 00:00:00
abstract：:A rapid, simple assay procedure was developed for simultaneous analysis of aspirin (ASA) and salicylic acid (SA) in aspirin delayed-release tablet formulation by 'zero crossing' second-derivative UV spectrophotometry. The zero-order absorption spectra and second derivative spectra of ASA and SA were recorded in diluti...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(98)00225-8
更新日期：1998-12-01 00:00:00
abstract：:We have developed a simple, rapid, selective, and reproducible method for the quality control of traditional Chinese medicinal preparations. In this study, we used LC/MS/MS to simultaneously identify and quantify five marker compounds - matrine, oxymatrine, ferulic acid, mangiferin, and glycyrrhizin - in preparations ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2005.07.036
更新日期：2006-02-13 00:00:00
abstract：:Persistent abuse and overuse of antibiotics induces a widespread bloom of antibiotic resistance genes (ARGs) and the emergence of superbugs. A method designed to rapidly quantify ARGs in real-world scenarios is urgently needed. Here, we present an orthogonal test of heavy water and kanamycin exposure, namely, a "clove...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113108
更新日期：2020-03-20 00:00:00
abstract：:In the present study, an accurate, simple and fast bioanalytical method based on ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) technique for simultaneous quantification of plasma selexipag and its main metabolite ACT-333679 concentrations in rats was optimized and established. The purpo...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113496
更新日期：2020-10-25 00:00:00
abstract：:S012-1332 is the first DNA ligase I inhibitor that demonstrated in vivo anti-breast cancer activity. The present study aimed to assess the in vivo pharmacokinetics of S012-1332 in rats and interpret them with in vitro findings. A sensitive and selective liquid chromatography-tandem mass spectrometry bioanalytical meth...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2018.09.031
更新日期：2019-01-05 00:00:00
abstract：:A simple and sensitive high-performance liquid chromatographic method for the analysis of acetazolamide (AZ) in rat blood (plasma/serum, whole blood and serum ultrafiltrate), brain tissue and cerebrospinal fluid (CSF) was described. Quantitative extraction of AZ with ethyl acetate from both buffered plasma and brain t...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(98)00024-7
更新日期：1998-09-01 00:00:00
abstract：:The validation of an analytical method for the quantitative determination of erythromycin thiocyanate formulated in an antibiotic preparation for veterinary use was carried out. This method is based on the microbiological method described in the European Pharmacopoeia to analyze erythromycin thiocyanate as a raw mater...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(99)00143-0
更新日期：1999-11-01 00:00:00
abstract：:The deuterohemin-peptide conjugate (DhHP-6) is a microperoxidase mimetic, which has demonstrated substantial benefits in vivo as a scavenger of reactive oxygen species. This paper reports the development of a sensitive and rapid liquid chromatography tandem mass spectrometry (LC-MS/MS) method for the determination of ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2014.06.026
更新日期：2014-09-01 00:00:00
abstract：:An unknown degradation product (DP-1) increased in olmesartan medoxomil (OLM) tablets stored at 40 degrees C/75% r.h., reaching 0.72% after 6 months. The molecular weight and fragment information obtained by LC-MS suggested that DP-1 was a dehydrated dimer of olmesartan (OL) and the presence of ester carbonyl group wa...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.02.021
更新日期：2008-07-15 00:00:00
abstract：:Lignans are the bioactive constituents in Schisandra chinensis fruits. For the first time major representatives could directly be determined in plant extracts by using Supercritical Fluid Chromatography. Based on nine commercially available standards the method was developed, finally permitting their baseline separati...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113254
更新日期：2020-06-05 00:00:00
abstract：:A sensitive liquid chromatography tandem mass spectrometry (LC-MS/MS) method for the determination of adenosine concentrations in mouse brain microdialysis samples was developed. High method sensitivity (LLOQ of 1.25 fmol) was achieved by on-line switching column. A C18 was employed as enrichment column and a cyano ba...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2012.05.014
更新日期：2012-11-01 00:00:00
abstract：:To investigate Raman spectral features of a coated biconvex tablet under variation of its orientation respective to laser illumination, spectra of the tablet were collected by illuminating laser on 12 different locations on the tablet with 3 different illumination angles of 45, 75 and 90°. The spectral variations were...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2016.08.038
更新日期：2016-11-30 00:00:00
abstract：:The present manuscript deals with a simple and sensitive flow-injection method for the chemiluminescent determination of thiazides. The method is based on the on-line photodegradation and chemiluminescent determination of the resulting photo-fragments. The on-line photodegradation is performed in basic medium by using...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2004.08.020
更新日期：2004-11-19 00:00:00
abstract：:In early safety assessment studies with the experimental anti-neoplastic drug XP315, a toxic reaction was observed in dogs immediately after intravenous (iv) infusion. The reaction was characterized by severe erythema around the ears, eyes, face and body; ocular hyperemia; head shaking; swelling around the eyes, face,...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(01)00550-7
更新日期：2002-01-01 00:00:00
abstract：:Salvianolic acid B (SAB), tanshinone IIA (TS), ginsenoside Rb₁ (Rb₁), ginsenoside Rg₁ (Rg₁) and notoginsenoside R₁ (R₁) are major active ingredients of Fufang Danshen preparation (FDP) for its protective effects on myocardial ischemia. This study investigated the pharmacokinetics of marker compounds after oral adminis...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2012.03.058
更新日期：2012-08-01 00:00:00
abstract：:The role of selenium as an antioxidant and anticancer agent is very well documented in the literature. Selenium compound showing the highest activity as a free radicals scavenger and as an anticancer agent should contain selenium at +4 oxidation level. The synthesis of selenitetriglycerides (named selol) was carried o...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(03)00205-x
更新日期：2003-08-08 00:00:00
abstract：:A study was carried out to investigate compatibility of atenolol, a beta(1) blocker, with a variety of pharmaceutical excipients. The binary mixtures (1:1) of atenolol with the excipients were stored for 1 month at 40 degrees C/75% RH. The samples were directly observed for the physical changes, and also analyzed by a...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2009.01.014
更新日期：2009-05-01 00:00:00
abstract：:D-amino acids are currently recognized as naturally occurring physiologically active substances and biomarkers in mammals. The progress of analytical technologies, mostly high resolution chromatographic or electrodriven separation methods, has significantly contributed to the advances in D-amino acid research in real ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/j.jpba.2012.01.041
更新日期：2012-10-01 00:00:00
abstract：:Aurantio-obtusin, an anthraquinone isolated from cassiae semen, possesses diverse pharmacological activities, including hypotensive, hypolipidemic and anti-inflammatory effects. However, our previous studies demonstrated that exposure to aurantio-obtusin induced hepatotoxicity, but the mechanisms of the toxic effects ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2021.113896
更新日期：2021-01-13 00:00:00
abstract：:A highly sensitive and selective liquid chromatography-tandem mass spectrometry method for the determination of tetrahydrocannabinol (THC), cannabidiol, and rimonabant in rat plasma was developed. Analytes and the internal standard were extracted from plasma using a combination of protein precipitation followed by liq...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2018.07.004
更新日期：2018-10-25 00:00:00
abstract：:A method is described for analysis of the tetracycline antibiotic minocycline using capillary zone electrophoresis. Potential impurities are 4-epiminocycline, 6-deoxy-6-demethyltetracycline, 7-didemethylminocycline, 7-monodemethylminocycline and 9-minocycline. Method development was undertaken with a mixture consistin...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(96)01732-3
更新日期：1996-06-01 00:00:00
abstract：:A tadalafil analogue was detected for the first time during the screening of a health supplement for undeclared sexual enhancement drugs. The compound had been isolated and purified by preparative high-pressure liquid chromatography (HPLC). Its chemical structure was elucidated using high-resolution mass spectrometry ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2015.08.005
更新日期：2016-01-25 00:00:00
abstract：:A highly sensitive DNA detection method using a combination of ethidium bromide (EtBr) and SYBR Green II (SG II) for microchip electrophoresis was developed. By use of the combination of these intercalating DNA-staining dyes for microchip electrophoresis with Hitachi SV1100 system, the fluorescence intensities corresp...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2010.12.014
更新日期：2011-04-28 00:00:00
abstract：:Quantitative whole-body autoradiography (QWBA) and liquid scintillation counting (LSC) have been conducted to determine the metabolic profiles and tissue distribution of [(14)C] labeled artesunate (AS) injection in rats. The QWBA technique showed more accurate results in the quantification of radioactivity in 40 organ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.07.015
更新日期：2008-11-04 00:00:00
abstract：:Statistical modelling and experimental design (SMED) are essential tools for the development and understanding of complicated products and processes. SMED allows efficient experimentation in which all or a large subset of factors are together varied over a set of experiments, in contrast to the traditional approach of...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(91)80185-c
更新日期：1991-01-01 00:00:00
abstract：:A new method was developed for the simultaneous determination of nine major constituents in Dracocephalum rupestre, including 5,7-dihydroxychromone (1), eriodictyol-7-O-beta-d-glucoside (2), luteolin-7-O-beta-d-glucoside (3), naringenin-7-O-beta-d-glucoside (4), apigenin-7-O-beta-d-glucoside (5), eriodictyol (6), lute...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.09.013
更新日期：2008-12-15 00:00:00
abstract：:Ligustilide (LIG) is the main active ingredient of Angelica sinensis (Oliv.) Diels and has a neuroprotective effect against ischemic stroke. However, owing to its multi-conjugated unstable structure, the compound has poor drug-forming properties. Therefore, we synthesized highly stable colorless needle crystals (known...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113140
更新日期：2020-04-15 00:00:00
abstract：:A new tadalafil analogue was identified along with homotadalafil during routine screening of an adulterated dietary supplement using HPLC-DAD. The UV spectrum of this analogue was almost identical with that of tadalafil. This compound was isolated from the supplement by using semi-preparative HPLC and its structure wa...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2015.07.023
更新日期：2015-11-10 00:00:00
abstract：:Experimental evidences now indicate that memory formation relies on the capacity of neuronal networks to manage long-term changes in synaptic communication. This property is driven by N-methyl-D-aspartate receptors (NMDAR), which requires the binding of glutamate but also the presence of the co-agonist D-serine at the...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/j.jpba.2015.02.013
更新日期：2015-12-10 00:00:00
