Abstract：
:This study assessed a general method of quantitative nuclear magnetic resonance (qNMR) for the calibration of atropine sulfate (Active Pharmaceutical Ingredient, API) as reference standard. The spectra were acquired in D2O using maleic acid as the internal standard. Conformational behaviors of tropane ring were observed and studied by means of NMR and ROESY experiments at different temperature, which showed that the azine methyl group was at equilibrium for axial and equatorial conformations at room temperature. Signal delay and monitor signals of qNMR experimentation were optimized for quantification. The study reported here validated the method's linearity, range, limit of quantification, stability and precision. The results were consistent with the results obtained from mass balance approach.
journal_name
J Pharm Biomed Analjournal_title
Journal of pharmaceutical and biomedical analysisauthors
Shen S,Yao J,Shi Ydoi
10.1016/j.jpba.2013.10.036subject
Has Abstractpub_date
2014-02-01 00:00:00pages
118-21eissn
0731-7085issn
1873-264Xpii
S0731-7085(13)00495-0journal_volume
89pub_type
杂志文章abstract：:Pharmaceutical heroin for inhalation was developed for a clinical trial on co-prescription of heroin and methadone to chronic treatment-resistant heroin addicts. Diacetylmorphine base was selected as the active pharmaceutical ingredient for this product with caffeine anhydrate added as an excipient. Differential scann...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2005.06.011
更新日期：2005-10-04 00:00:00
abstract：:An HPLC method was developed and validated to determine trace amounts of dexamethasone related substances on dexamethasone-coated drug-eluting stents. Separation of dexamethasone from its major process impurities and degradation products was achieved on a Zorbax Eclipse XDB C8 column using gradient elution and UV dete...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.07.010
更新日期：2008-11-04 00:00:00
abstract：:Both a GC-MS and an LC method have been developed for the simultaneous quantitation of dolasetron and reduced dolasetron in human plasma. The GC-MS method has been utilized in preliminary human pharmacokinetic studies of dolasetron mesylate. Selected ion monitoring was used in these initial studies to obtain the sensi...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(93)80055-6
更新日期：1993-10-01 00:00:00
abstract：:Tramadol is a centrally acting analgesic drug used in veterinary and human clinical practice. Its metabolism has been largely characterized in human being but is still long to be comprehended in several animal species, especially in the dog. The aim of the present study was to develop and validate a new analytical pro...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2010.03.016
更新日期：2010-10-10 00:00:00
abstract：:A rapid and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method with multiple reaction monitoring (MRM) was developed for the determination of solanesol in Nicotiana tabacum. Sample preparation was performed by ultrasonic extraction with methanol for 20 min and then supernatant was extracted wit...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2007.01.021
更新日期：2007-05-09 00:00:00
abstract：:This paper deals with the chiral separation of optical isomers of beta-methyl-amino acids by CE and HPLC using the principle of ligand-exchange. Capillary zone electrophoresis was carried out using Cu(II) complexes of L-4-hydroxyproline (L-4-Hypro), N-(2-hydroxypropyl)-L-4-hydroxyproline (HP-L-4-Hypro) and N-(2-hydrox...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(01)00616-1
更新日期：2002-01-15 00:00:00
abstract：:In this work, metabolites of cyadox (CYX) produced by liver microsomes, primary hepatocytes and intestinal microflora systems of rat, chicken and swine were identified and elucidated using ultra-performance liquid chromatography/quadrupole time-of-flight tandem mass spectrometry (UPLC/Q-TOF-MS). Expected and unexpecte...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2012.04.004
更新日期：2012-08-01 00:00:00
abstract：:Analytical strategies for detecting drugs in biological samples rely on information on metabolism and elimination. 5F-PY-PICA belongs to the group of synthetic cannabinoids that are known to undergo excretion into the bile. The aims of this study were the in vitro identification of metabolites of 5F-PY-PICA and to det...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2017.11.027
更新日期：2018-02-05 00:00:00
abstract：:The aim of this study was to evaluate the relationship between serum levels of beta-trace protein (BTP), a low molecular weight (MW) protein, and glomerular filtration rate (GFR). GFR and serum levels of BTP, and for comparison creatinine (Creat), cystatin C (Cys) and beta 2-microglobulin (beta 2M), were measured in 6...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(03)00215-2
更新日期：2003-08-08 00:00:00
abstract：:A molecular imprinted polymer (MIP) was prepared to 7-hydroxycoumarin (7-OHC). A number of preparation parameters were examined by ultraviolet (UV) spectroscopy, including the amount of solvent used for reaction, equilibration time, selectivity and capacity of material. The polymer which showed the most selectivity fo...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(97)00043-5
更新日期：1997-10-01 00:00:00
abstract：:A sensitive and specific liquid chromatography coupled with tandem mass spectrometry (LC/MS/MS) method was developed and validated for the determination of PAC-1 in rat plasma. After extraction with ethyl acetate, the chromatographic separation was carried out on an ACQUITY UPLC™ BEH C(18) column, with acetonitrile an...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2010.07.042
更新日期：2011-01-05 00:00:00
abstract：:The Sceletium plant has been reported to contain psychoactive alkaloids, specifically mesembrine, mesembrenone, mesembrenol and other related alkaloids. Sceletium is marketed through health shops and on the internet as dried plant powder and as pharmaceutical dosage forms. The objectives of this research was to develo...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.01.002
更新日期：2008-09-29 00:00:00
abstract：:Quantitative analysis of metabolic mixtures by (1)H 1D NMR offers a limited potential for precise quantification of biomarkers, due to strong overlap between the peaks. Two-dimensional spectroscopy is a powerful tool to unambiguously and simultaneously measure a larger number of metabolite contributions. However, it i...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2010.07.046
更新日期：2011-01-05 00:00:00
abstract：:A non-aqueous capillary electrophoresis method for the determination of oxytetracycline in an ointment have been validated. The oxytetracycline (OTC) is separated from related impurities and degradation products as metal chelates with magnesium ions. Thus, the method show high selectivity. The sample preparation is pe...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(96)01998-x
更新日期：1997-05-01 00:00:00
abstract：:Remifentanil (GI87084) is a phenylaminopiperidine derivative of the fentanyl type with a potent analgesic activity and ultra-short half-life. The N-substituted labile methyl propanoate ester group is highly susceptible to cleavage by endogenous esterases and by chemical hydrolysis. The hydrolysis is stopped by additio...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(94)90035-3
更新日期：1994-02-01 00:00:00
abstract：:Alzheimer's disease (AD) is a neurodegenerative disease that seriously affects daily life. Schisandra chinensis (Turcz.) Baill. Fructus (SCF) and Alpinia oxyphylla Miq. Fructus (AOF) have been regarded as classical herbs for dementia since ancient times. Alpinia oxyphylla Miq.-Schisandra chinensis (Turcz.) Baill. herb...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2019.112874
更新日期：2020-01-05 00:00:00
abstract：:In recent years, dietary supplements and herbal medicines are increasing in popularity all over the world. However, it is problematic that some manufacturers illegally included synthetic drugs in their products. Due to the extremely complex matrices of those products, most existing methods for screening illegal adulte...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2005.07.035
更新日期：2006-02-13 00:00:00
abstract：:Enrichment and/or purification of intact glycopeptides and derivatized glycans are essential for mass spectrometry-based glycoproteomics and glycomics because of analytical challenges observed in the analysis. Here, a titania-based material was synthesized using a facile sol-gel method for the efficient analysis of gl...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2019.05.061
更新日期：2019-09-10 00:00:00
abstract：:UPLC-UV and HPLC-TOF-MS methods have been developed for the analysis of major sesquiterpenes and pyrrolizidine alkaloids from rhizomes of Petasites hybridus (L.) G.M. et Sch. (Family, Asteracea) and dietary supplements claiming to contain P. hybridus. The best results were obtained with Acquity UPLC™ HSS T3 (100 mm × ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2012.05.021
更新日期：2012-11-01 00:00:00
abstract：:Procedures to assess tobacco smoke exposure are reviewed and biomarkers used for determining the smoking status of an individual are compared. Methods used to extract these biomarkers from saliva, urine, and blood and the advantages and disadvantages of the assays are discussed. Finally, the procedures used to measure...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2004.01.009
更新日期：2004-04-01 00:00:00
abstract：:Alkyl quinolone molecules 2-heptyl-4-quinolone (HHQ) and 2-heptyl-3-hydroxy-4(1H)-quinolone (PQS) are important quorum sensing signals, which play a mediatory role in the pathogenesis of acute and chronic Pseudomonas aeruginosa infection. A targeted approach inhibiting the bacterial 'multiple virulence factor regulon'...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2017.02.034
更新日期：2017-05-30 00:00:00
abstract：:Recently direct plasma injection LC/MS/MS technique has been increasingly used in pharmaceutical research and development due to the demand for higher throughput of sample analyses. In this work, two on-line extraction methods including high flow LC/MS/MS and high flow column switching LC/MS/MS were investigated. The ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(01)00541-6
更新日期：2002-03-01 00:00:00
abstract：:Icariin, the major flavonoid constituent of the traditional Chinese medicine Epimedii Folium, is extensively researched owing to its comprehensive beneficial effects. This study aimed at identifying the in vivo metabolites and the metabolic profiling in rats after oral administration at a dose of icariin (100 mg/kg) w...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2019.02.021
更新日期：2019-05-10 00:00:00
abstract：:Strategies for the use of 1H and 19F nuclear magnetic resonance (NMR) spectroscopy as an aid to the study of the metabolic fate of fluorinated drugs are discussed with reference to the application of these methods to flurbiprofen metabolism in man. 1H and 19F NMR analysis of untreated urine enabled the detection of tw...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(90)80067-y
更新日期：1990-01-01 00:00:00
abstract：:Residual solvents (RS) are volatile organic chemicals that are used or produced during the manufacturing process of drug substances or excipients. The European Pharmacopoeia (Ph. Eur.) limits the amount of RS in pharmaceuticals, considering the International Conference on Harmonization (ICH) of Technical Requirements ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.05.015
更新日期：2008-09-10 00:00:00
abstract：:A novel online system including two-dimensional liquid chromatography coupled to high-resolution mass spectrometry (2D-LC/MS) was developed and applied for comprehensive phospholipid (PL) and sphingomyelin (SM) profiling of dorsal hippocampus (DHPC), ventral (VHPC) and prefrontal cortex (PFC) brain regions in a mouse ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2017.10.043
更新日期：2018-02-05 00:00:00
abstract：:A high-performance liquid chromatographic method for the simultaneous determination of 5-aminosalicylic acid (5-ASA), acetyl-5-aminosalicylic acid (Ac-5-ASA) and 2,5-dihydroxybenzoic acid (5-HSA) in human endoscopic intestinal biopsy with electrochemical detection has been developed and validated. A liquid-liquid extr...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(95)01608-2
更新日期：1995-12-01 00:00:00
abstract：:Propofol is a widely used intravenous anesthetic for sedation during the surgery and worldwide propofol abuse has been frequently reported also. As an essential procedure for sample pretreatment, solid-phase extraction (SPE) is generally time-consuming and labor-intensive, which hindered the further improvement in the...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113714
更新日期：2021-01-30 00:00:00
abstract：:To characterize and enable efficient rat pharmacokinetic (PK) screening in early drug discovery, automated sampling of blood time points are routinely employed. With the development of dried blood spot (DBS) technology for drug level quantitation, an opportunity exists for the automated collection of rat PK time point...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2012.04.013
更新日期：2012-08-01 00:00:00
abstract：:A micro-bore liquid chromatographic method was developed for the simultaneous determination of benazepril hydrochloride and hydrochlorothiazide in pharmaceutical dosage forms. The use of a BDS C-18 micro-bore analytical column, results in substantial reduction in solvent consumption and increased sensitivity. The mobi...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(99)00195-8
更新日期：1999-12-01 00:00:00
