Abstract：
:A carbon paste electrode modified with poly(vinylpyrrolidone) (PVP) was developed for the determination of rutin. PVP enhances the adsorption of rutin on the electrode surface due to the presence of hydrogen bonding between the imide group in PVP and the hydroxyl group in rutin. The current responses in cyclic and linear sweep voltammetric experiments were investigated and an oxidation peak was observed at +0.87 V vs. Ag/AgCl. Several parameters were investigated to evaluate the performance of the modified electrode. The best analytical response was obtained employing (75:15:10%, w/w/w) graphite powder:Nujol:PVP, with an accumulation time of 10 min, scan rate of 100 mV s(-1) and 0.1M phosphate buffer solution (pH 6.0) as supporting electrolyte. The analytical curve was linear for rutin concentrations of 3.9 x 10(-7) to 1.3 x 10(-5)M (r=0.9991) and the detection limit was 1.5 x 10(-7)M. The recovery of rutin from pharmaceutical samples ranged from 98.3 to 101.7% and the relative standard deviation was 3.3% for a solution containing 7.7 x 10(-6)M rutin (n=5). This electrode was successfully applied to the determination of rutin in pharmaceutical formulations. The results obtained using the proposed modified carbon paste electrode and those obtained by the standard method are in agreement at the 95% confidence level.
journal_name
J Pharm Biomed Analjournal_title
Journal of pharmaceutical and biomedical analysisauthors
Franzoi AC,Spinelli A,Vieira ICdoi
10.1016/j.jpba.2008.03.031subject
Has Abstractpub_date
2008-08-05 00:00:00pages
973-7issue
4-5eissn
0731-7085issn
1873-264Xpii
S0731-7085(08)00202-1journal_volume
47pub_type
杂志文章abstract：:The inclusion into the beta-cyclodextrin is used to improve pharmacokinetic characteristics of hesperetin and naringenin. Solubility of hesperetin and naringenin with increasing concentrations of beta-cyclodextrin grows as long as the temperature increased. Stability constants were determined by the solubility method ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/S0731-7085(03)00647-2
更新日期：2004-04-16 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：:A gas-chromatographic assay method was developed and validated for determination of busulfan in human plasma for test dose therapeutic drug monitoring. Busulfan and the internal standard (1,6-bis-(methanesulfonyloxy)hexane) were extracted from plasma samples and derivatized with 2,3,5,6-tetrafluorothiophenol prior to ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(95)01342-i
更新日期：1995-08-01 00:00:00
abstract：:A reliable, convenient, and sensitive on-line sweeping-MEKC sample concentration technique has been applied for the simultaneous separation of six steroids including two pairs of epimer with 10mM phosphate buffer (pH 7.0) that contains 80mM sodium dodecyl sulfate (SDS), 14mM β-cyclodextrin (β-CD), and 4% (v/v) methano...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2011.07.024
更新日期：2011-12-05 00:00:00
abstract：:A new HPLC method for the determination of paeoniflorin in rat serum with solid-phase extraction (SPE) for preconcentration is introduced. Paeoniflorin and an internal standard (pentoxifylline) were extracted from serum by means of SPE using cartridges with octadecyl chemically bound phase. The HPLC separation was the...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(03)00294-2
更新日期：2003-10-15 00:00:00
abstract：:Autoimmune diseases (AID) are a heterogeneous group of disorders that have in common a chronic inflammation and dysregulation of the immune system. Systemic lupus erythematosus (SLE) is one of the most frequent systemic autoimmune diseases characterized by autoimmune phenomena in multiple organs. The tests used for ev...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/j.jpba.2019.06.005
更新日期：2019-09-10 00:00:00
abstract：:The phenolic composition of herbal tea (HT) and hydromethanolic extract (HME) obtained from Grindelia robusta Nutt. was studied by HPLC-DAD-ESI/MS(n). Thirty six flavonoids and hydroxycinnamic acids were detected, from which thirty are described for the first time in this species. Quantification by HPLC-DAD showed tha...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2014.01.046
更新日期：2014-06-01 00:00:00
abstract：:Mass spectrometry based precision identification of natural products requires the validation of the reference compounds. This study attempted to develop a LC-QTOF MS combined with LC-TQ MS method to precisely characterize the chemicals of Si-Ni-San (SNS), a classic traditional Chinese medicine formula, which is compos...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113816
更新日期：2021-02-05 00:00:00
abstract：:The current study dealt with the degradation behavior of lacosamide (LAC) under ICH prescribed stress conditions. LAC was found to be labile under acid and base hydrolytic stress conditions, while it was stable to neutral hydrolytic, oxidative, photolytic and thermal stress. In total, seven degradation products (DPs) ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2014.03.010
更新日期：2014-07-01 00:00:00
abstract：:Monocyte locomotion inhibitory factor (MLIF, Met-Gln-Cys-Asn-Ser), a pentapeptide with anti-inflammatory activity, was developed for neural protection in acute ischemic stroke. Determination of MLIF in human plasma samples is of great importance for pharmacokinetic evaluation in clinical studies. A reliable and sensit...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2018.04.009
更新日期：2018-08-05 00:00:00
abstract：:This study aims to identify and quantify the six major bioactive flavones of the traditional Chinese medicine Scutellariae Radix (RS), including baicalein, baicalin, wogonin, wogonoside, oroxylin A and oroxyloside in rat after oral administration of a standardized RS extract. A novel, sensitive and selective method fo...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2014.03.033
更新日期：2014-08-01 00:00:00
abstract：:Clindamycin is widely used in antimicrobial prophylaxis to prevent surgical site infections. Adequate subcutaneous free tissue concentrations should reach therapeutic levels, which have to be maintained throughout the surgical procedure for antibiotic prophylaxis to be efficient. A method was developed and validated u...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2018.02.005
更新日期：2018-05-10 00:00:00
abstract：:The stability of the new chemical synthetic enaminone derivative (E118) was investigated using a stability-indicating high-performance liquid chromatography (HPLC) procedure. The examined samples were analyzed using a chiral HSA column and a mobile phase (pH 7.5) containing n-octanoic acid (5 mM), isopropyl alcohol an...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(01)00532-5
更新日期：2002-01-01 00:00:00
abstract：:Inductively coupled plasma mass spectrometry (ICP-MS) technique was used to analyze the contamination of selected 20 metals in 32 samples of honeybee venom and to demonstrate differences in the content of these elements. Among the analyzed metal microelements (Al, Co, Cu, Zn, Mn, Mo, B, V, Sr and Ni), macro-elements (...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2008.05.033
更新日期：2008-11-04 00:00:00
abstract：:Mixed-mode chromatography (MMC) is a fast growing area in recent years, thanks to the new generation of mixed-mode stationary phases and better understanding of multimode interactions. MMC has superior applications in the separation of compounds that are not retained or not well resolved by typical reversed-phase LC m...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章,评审
doi：10.1016/j.jpba.2016.05.007
更新日期：2016-09-05 00:00:00
abstract：:There must be a large market for active pharmaceutical ingredients of illegal source to support the huge and lucrative business of trade in illegal medicines. The active substances found in illegal pharmaceuticals may differ from their legal counterparts concerning purity and associated risks for the health of the use...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2016.08.027
更新日期：2016-11-30 00:00:00
abstract：:An HPLC method with fluorescence detection suitable for routine determination of levofloxacin in plasma and dialysate has been validated. Sample preparation was assured by one-step protein precipitation for plasma or direct injection of the dialysate solution, respectively. Separation occurred on an YMC Pro C18 RP col...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2006.02.010
更新日期：2006-06-16 00:00:00
abstract：:A simple, precise, accurate stability-indicating gradient reverse phase ultra-performance liquid chromatographic (RP-UPLC) method was developed for the quantitative determination of purity of Valsartan drug substance and drug products in bulk samples and pharmaceutical dosage forms in the presence of its impurities an...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2010.05.022
更新日期：2010-11-02 00:00:00
abstract：:Chinese medicine formula (CMF) usually contains multiple herbs and its components are very complicated, which therapeutic effects are derived from the integrative activity of multiple components. Therefore, the screening of bioactive compounds in the formula is necessary, though it is very difficult, not only for eluc...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113331
更新日期：2020-07-15 00:00:00
abstract：:Flunixin is determined in equine plasma by liquid chromatography on LiChrosorb RP-18 with 70% methanol in phosphate buffer pH 3.1 as the eluent, with detection at 284 nm. Plasma is deproteinized with methanol and the supernatant is then injected directly into the system. With a short pre-column (5 x 3 mm i.d.), which ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(84)80053-9
更新日期：1984-01-01 00:00:00
abstract：:An UPLC-MS/MS method for the quantification of indirubin in lithium heparinized rat plasma was developed and validated according to current international guidelines. Indirubin was extracted from rat plasma by using Waters Ostro™ pass-through sample preparation plates. The method was validated with a LLOQ of 5.00ng/mL ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2016.05.018
更新日期：2016-09-05 00:00:00
abstract：:Isoflavonoids are widespread constituents in medical plants especially in legumes (Fabaceae), but occur in other different plant families as well (Rosaceae, Iridaceae, Amaranthaceae). Their antioxidant, estrogen-like, anti-inflammatory and analgesic effects make them promising compounds in therapy of important disorde...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2013.05.012
更新日期：2013-10-01 00:00:00
abstract：:Vancomycin (VCN) is an antibiotic used in the treatment of methicillin-resistant Staphylococcus aureus (MRSA)-derived infections. As it has a relatively narrow therapeutic window, it is imperative to develop a sensitive and reliable analytical method for drug monitoring and pharmacokinetic purposes. In the present stu...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2020.113429
更新日期：2020-09-10 00:00:00
abstract：:The H-point standard additions method (HPSAM) and two versions of the generalized H-point standard additions method (GHPSAM) are evaluated for the UV-analysis of two-component mixtures. Synthetic mixtures of anhydrous caffeine and phenazone as well as of atovaquone and proguanil hydrochloride were used. Furthermore, t...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(99)00111-9
更新日期：1999-10-01 00:00:00
abstract：:Extracts of Acacia rigidula leaves are used in weight-loss products sold in vitamin shops and over the internet with little or no published data about their potential biological effects. In our chemical investigations on authenticated A. rigidula plant material, we established a rapid and sensitive LC-MS/MS method for...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2013.09.012
更新日期：2014-01-01 00:00:00
abstract：:A miniaturized immunoassay for human interleukin-13 (IL-13) using homogeneous time-resolved fluorescence (HTRF) has been developed. In this assay, IL-13 which was secreted from NK3.3 cells stimulated with interleukin-2 (IL-2) was detected by measuring the time-resolved fluorescence after adding a mixture of three reag...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(01)00596-9
更新日期：2002-04-01 00:00:00
abstract：:Gamma-hydroxybutyric acid (GHB) and its "pro-drugs", gamma-butyrolactone (GBL) and 1,4 butanediol (1,4-BD), are drugs of abuse with depressant effects on the central nervous system. Many analytical methods have been proposed for the quantitative determination of these compounds mainly in biological matrices but only f...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2012.10.006
更新日期：2013-02-23 00:00:00
abstract：:An HPLC-UV method was developed for assay of linezolid in dog, rat, mouse, and rabbit plasma. Linezolid and the internal standard were extracted on a solid phase cartridge (SPE) and separated on a reversed-phase column (C8, 4.6x150 mm, 5 microm) with 20% acetonitrile in water as mobile phase. The SPE quantitatively re...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/s0731-7085(98)00310-0
更新日期：1999-06-01 00:00:00
abstract：:The present investigation was aimed at the evaluation of possible interactions between mirtazapine and selected solid lipids that are commonly used to develop solid lipid nanoparticles (SLNs) and nanostructured lipidic carriers (NLCs). The solids lipids explored were palmitic acid, stearic acid, glycerylmonostearate, ...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/j.jpba.2018.08.041
更新日期：2018-11-30 00:00:00
abstract：:The application of a circular dichroism (c.d.) detection system in HPLC using a chiral stationary phase is presented. The simultaneous measurement of the absorbance and c.d. signal allows the evaluation of the anisotropy factor (g = delta epsilon/epsilon) and thus the determination of the enantiomeric excess (e.e.) of...
journal_title：Journal of pharmaceutical and biomedical analysis
pub_type： 杂志文章
doi：10.1016/0731-7085(90)80130-h
更新日期：1990-01-01 00:00:00
