Abstract：
:The 60 MHz (1)H NMR spectra of racemic thiopental, 1, have been studied with the achiral shift reagent, tris(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionato) europium(III), 2, and the chiral tris[3-(trifluoromethylhydroxymethylene)-d-camphorato] europium(III), 3, and tris[3-(heptafluoropropylhydroxymethylene)-d-camphorato] europium(III), 4. Enantiomeric shift differences, DeltaDeltadelta, were clearly observed for all three methyl signals of 1 with 3 or 4, with larger values obtained using the former reagent. Thus, a 0.216 molal solution of 1 in CDCl(3) at 28 degrees C with a 3:1 molar ratio of 0.359 displayed DeltaDeltadelta values of about 17 Hz for the proximal methyl of the methylbutyl group (at the chiral centre), 13 Hz for the CH(3) of the ethyl group, and 6 Hz for the distal CH(3) of the methylbutyl group. Results are compared for those obtained with 2 and 3 using secobarbital, talbutal, butabarbital and pentobarbital.
journal_name
J Pharm Biomed Analjournal_title
Journal of pharmaceutical and biomedical analysisauthors
Eberhart ST,Hatzis A,Jimenez J,Rothchild R,Simons Pdoi
10.1016/0731-7085(87)80027-4subject
Has Abstractpub_date
1987-01-01 00:00:00pages
233-45issue
3eissn
0731-7085issn
1873-264Xpii
0731-7085(87)80027-4journal_volume
5pub_type
杂志文章abstract：:In situ ATR-FTIR spectroscopy was used as a screening method to quantify the relative release of pamidronate (PAM) from films of polyelectrolyte (PEL) complex (PEC) particles. Stable colloid PEC particles consisting of poly(ethyleneimine) (PEI) and cellulose sulphate (CS) loaded with PAM were obtained by PEL complexat...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2012.03.047
更新日期：2012-07-01 00:00:00
abstract：:Greening analytical methods has become of great interest in the field of pharmaceutical analysis to protect both the operators' health and the environment. In this work, an innovative methodology combining Quality-by-Design (QbD) and Green Chemistry principles was followed to develop a single, green and robust RP-HPLC...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113507
更新日期：2020-10-25 00:00:00
abstract：:The photochemistry of 4-aminobenzoic acid has been investigated using two validated reversed-phase HPLC methods. Up to nine photoproducts have been detected, with chromatographic evidence for the formation of 4,4'-azobenzenedicarboxylic acid and 4,4'-hydrazobenzenedicarboxylic acid. The synthesis and analytical charac...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(96)01808-0
更新日期：1996-08-01 00:00:00
abstract：:Quantification of virus-like RNA sequences in biological fluids, like serum and cerebrospinal fluid, requires an RNA extraction method that is both reproducible and fast. Three RNA extraction methods were tested on enteroviruses: (1) the acid guanidine thiocyanate-phenol/chloroform (AGPC) method; (2) a method based on...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(03)00312-1
更新日期：2003-11-24 00:00:00
abstract：:A sensitive and specific method for the determination of bifendate in human plasma was developed, based on high-performance liquid chromatography (HPLC)-mass spectrometry (MS). The samples were extracted from plasma with diethyl ether, followed by separation and evaporation after addition of internal standard diazepam...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 临床试验,杂志文章
doi：10.1016/j.jpba.2005.08.007
更新日期：2006-03-03 00:00:00
abstract：:Carboplatin is a chemotherapy drug used in a variety of cancers with the primary toxicity being exposure-dependant myelosuppression. We present the development and validation of a simple, robust inductively coupled plasma mass spectrometry (ICP-MS) method to measure carboplatin in plasma ultrafiltrate. Plasma ultrafil...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2017.01.045
更新日期：2017-05-10 00:00:00
abstract：:A sensitive, selective and rapid liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-MS/MS) method has been developed for the quantification of the novel transforming growth factor-β (TGF-β) inhibitor SB-505124 in rat plasma and then validated. Plasma samples were prepared by simple protein prec...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2015.09.002
更新日期：2016-01-05 00:00:00
abstract：:Two unknown compounds are detected and isolated from health supplements for the enhancement of sexual function. The structures of the unknown compounds are elucidated using high-resolution MS, ESI-MS/MS, NMR, UV and IR. One compound is identified as an analogue of sildenafil in which the oxygen atom is substituted wit...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.01.016
更新日期：2008-06-09 00:00:00
abstract：:Sweat is a biofluid with present scant use as clinical sample. This review tries to demonstrate the advantages of sweat over other biofluids such as blood or urine for routine clinical analyses and the potential when related to metabolomics. With this aim, critical discussion of sweat samplers and equipment for analys...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/j.jpba.2013.10.048
更新日期：2014-03-01 00:00:00
abstract：:The present study reports the optimization and validation of a dissolution test for selegiline.HCl tablets using a new high-performance liquid chromatographic (HPLC) method. Rapid separation of the analyte from sample matrix was achieved in less than 60s using a Cromolith RP-18e monolithic column using UV detection at...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2007.11.039
更新日期：2008-03-13 00:00:00
abstract：:A simple, rapid, reliable and highly sensitive on-line two-dimensional reversed-phase liquid chromatography-tandem mass spectrometric (2D-LC/MS/MS) method to determine antiretroviral drugs viz., abacavir (ABC), nevirapine (NVP) and indinavir (IDV) in rat serum and urine was developed and validated. The analytes were e...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2009.07.005
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abstract：:A micellar electrokinetic chromatography (MEKC) method was developed for the determination of three anti-vomiting drugs (aprepitant, dexamethasone and ondansetron) in pharmaceutical formulations. The method was optimized using a central composite design (CCD). Four main factors (borate buffer concentration, pH, methan...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2013.07.029
更新日期：2013-12-01 00:00:00
abstract：:The stability of a series of fluorescent isoindoles formed under analytical conditions following the reaction of o-phthalaldehyde (OPA) and ethanethiol (ET) with a series of primary amines is reported. Increasing the bulk and degree of substitution of the isoindole N-substituent resulted in substantial increases in is...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(86)80056-5
更新日期：1986-01-01 00:00:00
abstract：:A simple, rapid and sensitive method termed as dispersive liquid-liquid microextraction (DLLME) combined with high-performance liquid chromatography-ultraviolet detector (HPLC-UV) has been proposed for the determination of three psychotropic drugs (amitryptiline, clomipramine and thioridazine) in urine samples. The de...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.11.036
更新日期：2009-02-20 00:00:00
abstract：:The metabolite profiling of plant extracts always represents an exciting challenge, as the chemical diversity of natural products is still far beyond the researchers' imagination, even focusing on a plant that is thought to have already been broadly investigated. Herein UHPLC-HRMS/MS techniques were applied to an alco...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2021.113892
更新日期：2021-02-20 00:00:00
abstract：:A simple isocratic reversed-phase HPLC method for the determination of gabapentin and its major degradation impurity, 3,3-pentamethylene-4-butyrolactam, was developed and validated for use in the analysis of pharmaceutical tablets and capsules. Separation was achieved on a Brownlee Spheri-5 Cyano column using an aceto...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2006.12.020
更新日期：2007-04-11 00:00:00
abstract：:Results gained from in vivo metabolism could be more authentic to reflect the biotransformation of drugs than in vitro metabolism. This paper discusses the development and characterization of an analytical method for controlling tiamulin (TIA) and doxycycline (DOX) residues in pig plasma and urine, as well as their in...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113428
更新日期：2020-10-25 00:00:00
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journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2016.11.002
更新日期：2017-01-30 00:00:00
abstract：:A simple and sensitive spectrophotometric method suitable for the stability control of pharmaceutical dosage forms containing glutathione (gamma-glutamyl-cysteinyl-glycine), GSH, is described. Besides GSH, the method quantitatively determines its oxidation product, GSSG. The colour reactions of GSH and GSSG with ammon...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(91)80041-7
更新日期：1991-01-01 00:00:00
abstract：:Nivolumab, an anti PD-1 monoclonal antibody, has been approved for the treatment of previously treated advanced or metastatic non-small-cell lung cancer (NSCLC). The aim of this study was to develop and validate an ELISA method for the quantification of nivolumab in plasma from patients with NSCLC in order to perform ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2017.02.041
更新日期：2017-05-30 00:00:00
abstract：:A simple and rapid spectrophotometric methods have been estimated for the microdetermination of phenylephrine HCl (I) and orphenadrine citrate (II). The proposed methods are based on the formation of ion-pair complexes between the examined drugs with alizarine (Aliz), alizarine red S (ARS), alizarine yellow G (AYG) or...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(02)00437-5
更新日期：2002-11-07 00:00:00
abstract：:The increasing complexity of novel biotherapeutics such as bispecific antibodies or fusion proteins raises new challenges for functional characterization. When compared to standard antibodies, two individual interactions and the inter-dependency of binding events need to be considered for bispecific antibodies. We hav...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2016.09.028
更新日期：2017-01-05 00:00:00
abstract：:Authentication of natural products is of major relevance in the context of manufactured drugs or herbal supplements since such active products generate a lucrative market. The analytical method to identify and quantify valuable natural products is critical for quality control and product assignment of herbal supplemen...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
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更新日期：2019-02-20 00:00:00
abstract：:A new method based on high-performance liquid chromatography coupled to ultraviolet and evaporative light scattering detection (HPLC-UV-ELSD) was developed for the determination of L-glutamic acid, a potential degradation product of pemetrexed, and for the quantification of pemetrexed itself. This is an ion-pairing, r...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2010.08.031
更新日期：2011-01-25 00:00:00
abstract：:The FT-Raman quantification of atorvastatin calcium in tablets was performed using the partial least squares (PLS), principal component regression (PCR) and counter-propagation artificial neural networks (CP-ANN) methods. To compare the predictive abilities of the elaborated models, the relative standard errors of pre...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.10.015
更新日期：2009-01-15 00:00:00
abstract：:An analytical method that allows simultaneous analysis of some (semi-)volatile drugs and additives in pharmaceuticals for topical use was developed using classical static headspace as sampling technique combined with gas chromatography (HS-GC). The capillary column used, RSL-200, showed good selectivity towards all th...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.04.006
更新日期：2008-08-05 00:00:00
abstract：:The mixture of creatinine, activated charcoal and water was stirred. As a result the conversion of creatinine into two products was observed. (1)H, (13)C NMR and HMBC spectra were recorded and the chemical shifts assigned. Two uremic toxins: creatol and N-methylguanidine were identified. To interpret the NMR data obta...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2009.02.012
更新日期：2009-05-01 00:00:00
abstract：:A simple reversed-phase high-performance liquid chromatography method was developed for the determination of s-carboxymethyl-l-cysteine in syrup preparations. The experiments were performed without specific sample pre-treatment. The LC conditions used were acetonitrile-10 mM sodium dihydrogenphosphate buffer, pH 2.0 (...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(00)00479-9
更新日期：2001-04-01 00:00:00
abstract：:A selective, sensitive and rapid mice dried blood spot (DBS) method has been developed and validated for the simultaneous quantification of bendamustine (BM) and γ-hydroxy-bendamustine (HBM) as per regulatory guidelines using an LC-MS/MS. Quality control, calibration curve and study sample DBS cards were sonicated wit...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2019.05.052
更新日期：2019-09-10 00:00:00
abstract：:Two simple sensitive and accurate methods have been developed for the determination of ritodrine hydrochloride in bulk and pharmaceutical preparations. The first method involves the direct measurement of the native fluorescence of the drug in the concentration range 4-9 microg ml(-1), the second method is based on the...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(98)00093-4
更新日期：1998-11-01 00:00:00
