反相高效液相色谱法测定血浆中氢溴酸右美沙芬浓度

报道了反相高效液相色谱法测定血浆中氢溴酸右美沙芬 ( DM)方法。采用Novapak C84μm,1 5 0 mm× 3.9mm i.d.分析柱 ,以乙腈∶水 =5 0∶ 5 0 ( V/V ,加0 .5 % HAc,三乙胺调节 p H至 4.3)为流动相 ,荧光检测器检测 ,DM的最小检出浓度为 0 .2 ng/m L。方法回收率为 93.71 % ,变异系数 3.5 3% ,操作简便 ,灵敏度高 ,适于血浆中 DM测定及药代动力学研究     

微流控芯片非接触电导法测定感冒药中盐酸伪麻黄碱和氢溴酸右美沙芬

研究了用微流控芯片非接触式电导法分离检测感冒药日夜百服咛片中的两种主要成分盐酸伪麻黄碱和氢溴酸右美沙芬的方法。优化条件为:缓冲液20 mmol/L Tris 20 mmol/L H3BO3(pH=8.0);进样电压300 V;进样时间10.0 s;分离电压3.0 kV。非接触电导检测器激发电压60 V(Vp-p),频率60 kHz。两种成分的线性范围分别为20~1000 mg/L和10~1000 mg/L;检出限分别为10和5.0 mg/L;样品回收率分别为99.3%和97.6%。     

高效液相色谱法同时测定诺诺感冒片中扑尔敏、扑热息痛、盐酸伪麻黄碱的含量

 采用反相高效液相色谱法 ,在C18柱上以V(甲醇 )∶V(水 ) =2 5∶75的溶液为流动相 (内含 0 .0 5mol/L磷酸二氢钠 ) ,检测波长为 2 0 5nm ,同时分离测定诺诺感冒片中扑尔敏、扑热息痛、盐酸伪麻黄碱的含量。扑尔敏、扑热息痛和盐酸伪麻黄碱的检出限分别为 1.16mg/L ,0 .15mg/L和 1.82mg/L ,其相应的回收率分别为 98.35 % (n =5 ,RSD =1.6 0 % ) ,10 1.16 % (n =5 ,RSD =1.5 0 % )和 98.5 0 % (n =5 ,RSD =1.5 9% )。方法简便、快速 ,重现性好 ,适用于诺诺感冒片的质量检验分析。     

反相液相色谱法测定双酚A和苯酚

双酚A[4,4′-双(4-羟苯基)丙烷]是生产环氧树脂、聚碳酸酯、巨砜和改性酚醛树脂等高聚物的重要原料,此外,还大量用来制造涂料、粘合剂、橡胶防老化剂和农药杀菌剂等。 合成双酚A的主要原料是苯酚,因此,来反应的苯酚单体就成了双酚A产品中的主要杂质,为了随时掌握苯酚的转化率、监控产品质量,需要建立一种快速、灵敏、简便、准确地测     

反相高效液相色谱法同时测定四种氟喹诺酮类药物

在ＳＨＩＭ－ＰＡＣＫ ＣＬＣ－ＯＤＳ柱上,以甲醇与０．０５ｍｏｌ／Ｌ柠檬酸＋０．０１ｍｏｌ／Ｌ醋酸铵（ＰＨ４．５）（Ｖ甲醇：Ｖ柠檬酸＋醋酸铵＝２５：７５）的混合溶液为流动相,要用反相高效相色谱法分离了测定了四种氟喹诺酮类药物;环丙沙星、氧氟沙星、诺氟沙星、依诺沙星,线必不丙沙星和氧氟沙星１０～１００μｇ／ｍＬ,诺氟沙星和依诺沙星２～８０μｇ／ｍｌ,相关系数ｒ〉０．９９９５,检出限分别为环丙沙星和依     

高效液相色谱法检测一次性纸杯中的双酚A

建立了高效液相色谱法测定一次性纸杯中双酚A的分析方法。采用Diamonsil C18(250mm×4.6 mm,3μm)反相色谱柱,以甲醇-水溶液为流动相,光电二级管阵列检测器,检测波长为228nm。线性范围为0.1~100mg·L-1,相关系数为0.9996,方法的回收率为92.1%~96.4%,相对标准偏差为3.2%~5.7%。该方法简便、灵敏准确,能够满足双酚A的检测要求。     

高效液相色谱法同时测定化妆品中多种美白祛斑剂

建立了化妆品中8种美白祛斑剂高效液相色谱分析方法。采用Zorbax Eclipse XDB C18色谱柱(250 mm×4.6 mm,5.0μm)为固定相,0.02 mol/L磷酸二氢钾溶液(pH 6.95)和甲醇溶液为流动相,梯度洗脱,流速为1.0 mL/min,柱温为25℃,二极管阵列检测器,检测波长为270 nm,外标法定量。结果显示:8种美白祛斑剂线性关系良好,线性范围分别为:曲酸3.0~60 mg/L,维生素C磷酸酯镁、烟酰胺、苯酚为5.0~100 mg/L,熊果苷、氢醌、树莓苷、甘草酸二钾为10.0~200 mg/L。相对标准偏差(n=6)为0.22%~2.6%,平均回收率为95%~105%。     

反相高效液相色谱法测定盐酸索他洛尔

建立了用于盐酸索他洛尔的含量测定、有关物质的检查和稳定性考察的 RP-HPL C法。采用 ODS柱、体积分数为 0 .1 %的乙酸水溶液 -乙腈 (体积比为 80∶ 2 0 )为流动相的色谱条件 ,以磺胺二甲基嘧啶为内标物 ,测定的线性范围为 5～ 45 mg/ L(r=0 .9991 ) ,日内精密度为 0 .2 0 % ,日间精密度为 0 .93 %。     

反相高效液相色谱法测定盐酸丁卡因药膜的有关物质及含量

建立了反相高效液相色谱-紫外检测器法检测盐酸丁卡因药膜4种有关物质以及含量的方法。采用Shimadzu C18(4.6×150 mm,5μm)色谱柱,甲醇溶液(含体积分数0.45%三乙胺和10 mmol/L庚烷磺酸钠,60∶40,V:V)为流动相,用H3PO4调节pH 3.0;盐酸丁卡因在0.10~40μg/L浓度范围内呈良好线性关系(r=0.9999);平均回收率(n=9)为97.3%,RSD为0.68%,盐酸丁卡因和4种有关物质的检出限分别为0.1,0.01,0.005,0.01和0.02 mg/L。     

高效液相色谱法同时测定环境水体中的双酚A、辛基酚和壬基酚

建立了高效液相色谱-荧光检测法同时测定环境水体中双酚A(BPA)、辛基酚(DP)和壬基酚(NP)的方法。比较了液液萃取(LLE)和固相萃取(SPE)两种前处理方法,并设计了供复杂样品使用的净化柱。水样经萃取后,用轻柔氮气吹干,甲醇溶解,采用Phenomenex Luna C18色谱柱,以乙腈-水为流动相进行梯度洗脱,在激发波长275nm、发射波长300nm下进行荧光检测。结果表明,BPA、NP、OP的仪器检出限(S/N=3)分别为1μg/L、2μg/L和1μg/L。SPE法操作简单快捷,虽然NP、OP的回收率低于LLE法,但仍能满足对环境样品的测定要求。净化柱净化效果较好,能够进一步去除基质干扰,满足特别复杂水样的前处理。方法基于不同样品处理的浓缩倍数不同,三种物质的检出限在0.001～0.004μg/L之间。环境水样中BPA、NP和OP的加标回收率分别为86.2%～104%、61.6%～109%和81.5%～100%,相对标准偏差(RSD)分别为2.9%～6.4%、2.4%～5.6%和2.7%～6.9%。     

Simultaneous Determination of Ibuprofen and Pseudoephedrine Hydrochloride in Pharmaceutical Tablets by Reversed-Phase HPLC

Abstract

An isocratic HPLC method was developed and validated for the simultaneous determination of ibuprofen (IBU) and pseudoephedrine hydrochloride (PSE). Chromatography was carried out on an Apex phenyl column using 0.025 M acetic acid, triethylamine solution (pH 4.5) – acetonitrile (80:20, v/v) as mobile phase at a flow rate of 1 mL · min^?1. UV detection was performed at a wavelength of 210 nm. The method was validated for specificity, linearity, accuracy, precision, and was successfully applied to pharmaceutical tablets of Rhinadvil®.     

Spectrophotometric Determination of Dextromethorphan Hydrobromide and Ketamine Hydrochloride in Pure and Dosage Forms

Three simple, sensitive and accurate spectrophotometric methods have been developed for the determination of dextromethorphan hydrobromide (DEX) and ketamine hydrochloride (KET) in dosage forms. These methods are based on the formation of ion‐pair complexes with bromocresol green (BCG), bromocresol purple (BCP), and bromophenol blue (BPB) in acidic medium. The coloured ion‐pair products are measured at 419, 409 and 417 nm for DEX and at 417, 408 and 416 nm for KET using BCG, BCP and BPB, respectively. Beer's law was obeyed in the range of 2.0–22 μg mL^?1 for DEX and 2.0–16 μg mL^?1 for KET. The composition of the ion‐pair was established by continuous variation and molar ratio methods. The proposed methods were applied successfully for the determination of DEX and KET in dosage forms applying the standard addition technique and compared statistically with the official methods. The molar absorptivity, Sandell sensitivity, detection and quantification limits were also calculated.     

Simultaneous Determination of Four Active Components in a Compound Formulation by Liquid Chromatography

Summary A rapid and accurate LC method is described for simultaneous determination of pseudoephedrine hydrochloride (PSE), acetaminophen (AMP), dextromethorphen hydrobromide (DEX), and diphenhydramine hydrochloride (DPH) in a compound formulation. Chromatographic separation of the four drugs was achieved on a Hypersil CN column (150 mm × 4.6 mm, 5 m particle) by use of a mobile phase comprising a mixture of 3 mM ion-pairing solution, 2% aqueous triethylamine solution, and 2 M phosphoric acid, 68:48:88 (v/v), pH 3.0, delivered at 1.0 mL min^–1. Compounds were detected at 215 nm and the run time was less than 10 min. The linearity, accuracy, and precision of the method were found to be acceptable over the concentration ranges 6.1–36.4 g mL^–1 for PSE, 65.0–390.0 g mL^–1 for AMP, 3.1–18.6 g mL^–1 for DEX, and 5.0–30.0 g mL^–1 for DPH.     

反相高效液相色谱法测定盐酸齐拉西酮及有关物质

建立了盐酸齐拉西酮及有关物质的反相高效液相色谱测定法。采用C18色谱柱,以甲醇-50mmol／L醋酸钠缓冲溶液梯度洗脱,使盐酸齐拉西酮及8个中间体基线分离,采用二极管阵列检测器,检测波长254砌。各杂质的最低检出限均可满足测定的要求。建立的方法操作简便,重现性好,结果准确。     

高效液相色谱法测定家兔血清中盐酸山莨菪碱含量

rapid method for the separation and determination of anisodamine hydrochloride in serum of rabbit has been developed with Nucleosil column of 4. 6× 250mm and CH3OH-H2O-(C2H5)3N (30:70 : 0.125)as mobile phase. Anisodamine hydrochloride was determined by reversed phase HPLC at 214nm.Atropine sulfate was used as an internal standard. The calibration curve was Y= 0.01945X+0. 05623,r= 0. 9998,n= 6.It was rectilinear within the range between 0. 75μg/mL-50.0μg/mL,and the recovery was from 97. 0% to 98. 2%.     

高效液相色谱法同时测定化妆品中七种性激素

建立了化妆品中7种性激素(雌二醇、雌三醇、雌酮、睾酮、甲基睾酮、孕酮、己烯雌酚)同时测定的高效液相色谱法。先在试样中加入20 g/L氢氧化钠溶液与油脂进行皂化反应,然后用二氯甲烷-乙酸乙酯(体积比为40∶1)混合液在酸性条件下(pH 3)萃取,选择XTerraTMRP18色谱柱,以水-甲醇-乙腈(体积比为50∶32∶18)混合液为流动相,在波长230 nm处检测。7种性激素分离良好并排除了样品中杂质峰的干扰,低、高浓度平均回收率范围为75.6%~97.8%;相对标准偏差为1.9%~7.2%;检出限为3.7     

反相高效液相法同时检测3种探针药物

 用反相高效液相同时测定血清中咖啡因、氨苯砜、氯唑沙宗探针药物的质量浓度,以乙腈 磷酸盐缓冲体系(含0 02mol/L的磷酸二氢钾和0 02mol/L的三乙胺,pH6 5)(体积比为25∶75)为流动相,以安替比林为内标,经C18柱(250mm×4 6mmi d ,5 0μm)分离,紫外检测器检测,使3种探针药物得到较好的分离,并且在有效血药浓度范围内线性良好。该法简便、快速,能够为临床安全有效的用药提供科学的依据。