弱阳离子整体柱在线富集分析尿液中盐酸雷尼替丁

不锈钢柱管中自制弱阳离子交换整体柱作为固相萃取材料,对尿样中盐酸雷尼替丁进行富集分析。以2.5mmol/LK2HPO4缓冲液作为富集流动相,结合柱切换法实现在线富集药物的同时去除尿液中蛋白等内源性物质。色谱分离条件为:C18反相色谱柱,在流速为1.0mL/min,检测波长为320nm条件下,用CH3OH-2.5mmol/LK2HPO4(2:1,V/V)进行洗脱。实验结果表明,盐酸雷尼替丁在0.05～5.0mg/L浓度范围内线性关系良好(r=0.9994,n=7);绝对回收率在75.0%～85.0%之间;检出限为0.01mg/L;日内、日间精密度(RSD)均小于5.0%,能够满足分析测定要求。本方法避免了繁琐的样品预处理过程,且所制弱离子整体柱可多次重复使用,为生物样品中痕量药物检测提供了一种快速、经济和有效的新方法。     

固相萃取-高效液相色谱法测定人血浆中的川芎嗪

建立了高效液相色谱测定人血浆中川芎嗪浓度的方法。色谱条件:分析柱为Luna C18(150 mm×4.6 mm i.d.,5 μ m),流动相为甲醇-乙腈-醋酸盐缓冲液(pH 5.0)(体积比为50∶8∶42),流速1.0 mL/min,柱温40 ℃,检测波长280 nm。 血浆样品预处理采用C8固相小柱萃取法。方法的线性范围为25～5000 μg/L,线性相关系数为0.9999。高、中、低浓度 的川芎嗪在标准血浆样品中的平均提取回收率为96.72％～100.90％,日内和日间相对标准偏差(RSD)小于8.64％,准确度 为99.59%~103.26%,检测限为10 μg/L。该方法的各项效能指标符合生物样品的分析要求,可用于川芎嗪制剂的人体药 代动力学研究。     

高效液相色谱法测定人血浆中奥美拉唑对映体的浓度

考察了奥美拉唑对映体在多糖类手性色谱柱(Chiralpak AD柱、Chiralcel OJ柱、Chiralpak AS柱和Chiralcel OD柱)上的分离行为及流动相组成对对映体分离的影响,建立了血浆中奥美拉唑对映体的分析方法。血浆样品采用Agilent BON DODS-C18固相萃取柱提取,以Chiralpak AD(250mm×4.6mm,10μm)为色谱柱;流动相:V(正己烷):V(乙醇)=30:70;流速:0.5mL/min;检测波长:302nm;柱温:25℃。方法的相对回收率为(-)-(S)-奥美拉唑96.7%～100.4%,(+)-(R)-奥美拉唑97.4%～100.2%;日内RSD4.7%,日间RSD3.3%;奥美拉唑对映体在5～1000ng/mL范围内线性关系良好(n=5,r=0.9997),最低检测浓度(S/N=3)2ng/mL。方法可用于奥美拉唑对映体人体药代动力学研究。     

高效液相色谱法测定血浆中的司帕沙星

用高效液相色谱法测定血浆中司帕沙星的浓度。以氧氟沙星为内标物,选择ZORBAXSB-C18色谱柱,以甲醇-磷酸盐溶液(35∶65)为流动相,血浆样品经乙腈沉淀蛋白质后高速冷冻离心,取上清液经0.22μm滤膜过滤后进样,检测波长为298nm。司帕沙星色谱保留时间为9.986min。在0.03124.00mg/L范围内线性关系良好(r=0.9998),回收率为93.95?.30%,日内RSD为1.21%2.69%,日间RSD为1.44%2.95%,最低检出限为5μg/L。该方法可用于药物动力学研究和临床药物监测。     

应用亲水作用色谱检测鸡蛋和肉中三聚氰胺及三聚氰酸二酰胺

应用亲水作用色谱(HILIC)对从市场上购买的鸡蛋和肉中的三聚氰胺及三聚氰胺降解产物三聚氰酸二酰胺进行了检测。采用的色谱柱为ZIC-HILIC柱,流动相为3 mmol/L磷酸二氢铵溶液(pH 6.9)-乙腈(20:80, v/v),流速为0.8 mL/min,检测波长为220 nm。在该体系下,三聚氰胺和三聚氰酸二酰胺的保留时间适中,与样品中的内源性物质有良好的分离。样品经0.1%磷酸提取,偏磷酸及乙腈沉淀蛋白质和糖类物质,以及P-SCX固相萃取柱净化。三聚氰胺和三聚氰酸二酰胺在0.4～40 mg/L范围内与峰面积呈良好的线性关系,样品定量限(按信噪比(S/N)不小于10计)为2 mg/kg,在2～10 mg/kg添加水平下的平均回收率为80%～105%,相对标准偏差小于10%。该方法具有良好的分离选择性,可用于鸡蛋和肉中三聚氰胺和三聚氰酸二酰胺的同时检测。     

固相萃取/高效液相色谱法测定化妆品中5种抗组胺药物残留

建立了固相萃取/高效液相色谱(SPE/HPLC)测定化妆品中5种抗组胺药物(多西拉敏、曲吡那敏、溴苯那敏、苯海拉明、氯苯沙明)残留的分析方法。试样经三氯乙酸溶液超声提取,PCX柱净化后,以甲醇-磷酸盐缓冲溶液为流动相,经C18柱分离后进行HPLC检测。5种抗组胺药物在5.0～100 mg/L范围内均呈良好的线性关系,线性系数均大于0.999。在5.0、10.0、25.0 mg/kg 3个加标水平下的平均回收率为92%～108%,相对标准偏差(RSD,n=6)为2.1%～4.2%,检出限为0.5～1.0 mg/L。该方法灵敏度高、重现性好、定量准确。     

高效液相色谱法测定冷面、米线中乙二胺四乙酸二钠

建立高效液相色谱法测定冷面和米线中乙二胺四乙酸二钠的分析方法。样品用水提取后,经三氯化铁络合,用Shimpack VP-ODS C₁₈色谱柱(250 mm×4.6 mm,5μm)分离,以四丁基溴化铵-乙酸钠混合溶液(pH 4.0)-甲醇(体积比为85∶15)为流动相,等度洗脱,采用紫外检测器检测,检测波长为254 nm,用色谱峰面积外标法定量。乙二胺四乙酸二钠的质量浓度在0.5～50μg/mL范围内与色谱峰面积线性关系良好,相关系数为0.999 8,方法检出限为1.5mg/kg,定量限为5.0 mg/kg。冷面和米线样品加标回收率为90.7%～103.5%,测定结果的相对标准偏差为1.2%～5.0%(n=6)。该方法操作简单快速。     

超高效液相色谱-串联质谱法测定果汁中的展青霉素

建立了超高效液相色谱-电喷雾串联三重四极杆质谱(UPLC-ESI-MS/MS)联用技术分析果汁中展青霉素的方法。浓缩果汁样品经酶解,乙酸乙酯提取,Oasis HLB固相萃取(SPE)小柱净化后(澄清果汁直接进行SPE净化),以C18色谱柱为分离柱,以水和乙腈作为流动相进行梯度洗脱,电喷雾离子源电离、负离子多反应监测模式质谱进行定性和定量分析。展青霉素在1.0～500.0 μg/L质量浓度范围内线性关系良好,相关系数为0.999,方法的定量限为5.0 μg/kg;加标水平为5.0、25.0和100.0 μg/kg时,加标回收率为80.6%～91.8%,相对标准偏差为1.5%～7.3%。实验结果表明,该方法简单、灵敏、准确,各项技术指标均满足国内外法规要求,可用于果汁中展青霉素的检测。     

固相萃取–高效液相色谱法同时测定饲料中4种磺胺类药物残留

建立固相萃取–高效液相色谱法同时测定饲料中的磺胺嘧啶、磺胺二甲嘧啶、磺胺甲恶唑、磺胺喹恶啉4种磺胺类药物残留的方法。样品用乙腈提取,然后用碱性氧化铝固相萃取柱净化,色谱柱为C_(18)柱(250 mm×4.6mm,5μm),以水–乙腈(体积比为75∶25,含0.3%乙酸)为流动相,流量为1.0 mL/min,检测波长为270 nm。4种磺胺类药物的质量浓度在1~10μg/mL范围内与其色谱峰面积呈良好的线性,相关系数均大于0.999,检出限为0.025~0.133μg/g。磺胺类药物测定结果的相对标准偏差为0.22%~0.30%(n=6),样品加标回收率为93.6%~106.7%。实际饲料样品中均未检出这4种磺胺组分。该方法具有干扰少,灵敏度高,重复性好的优点,可以作为饲料中的磺胺类药物残留的一种检测方法。     

反相离子对高效液相色谱法测定SD大鼠血浆中河豚毒素的含量

建立了大鼠血浆中河豚毒素(TTX)反相离子对高效液相色谱测定方法。血浆样品加水涡漩,再加沉淀剂V(乙腈)∶V(含0.5%HAc的甲醇液)=3∶1),旋涡离心后取上清液进样测定。色谱柱为Agilent ZorbaxSB C18柱(150 mm×4.6 mm×5μm);流动相为10?N-90%的8 mmol/L庚烷磺酸钠与0.005%TFA混合溶液,配好后调到pH5.0;紫外检测波长196 nm;流速1.0 mL/min;柱温为室温。本方法TTX标准品检出限为1.055 mg/L,血浆中TTX的检出限为0.1055 mg/L。血浆中TTX的线性范围为21.1~211 mg/L,r=0.9989。日内和日间精密度RSD均小于3%。本方该法准确、专属性强,适用于血浆中TTX的浓度测定。     

A Simple Isocratic High-Performance Liquid Chromatographic (HPLC) Determination of Naproxen in Human Plasma using a Microbore Column Technique

Abstract

A simple and sensitive HPLC method was developed for the determination of naproxen in human plasma. The assay employs a microbore column packed with a C18 reversed-phase material (5 μm ODS Hypersil) with an isocratic mixture of acetonitrile and 10 mM phosphate buffer, pH 2.5 (40:60, v/v) as the mobile phase. The mobile phase was pumped at a flow rate of 0.5 ml/min. For sample analysis 200 μl of acetonitrile containing internal standard (flurbiprofen) was added to 100 μl of plasma. After centrifugation 10 mM phosphate buffer, pH 7.4 (200 μl) was added to the tube, then vortexed and centrifuged. The supernatant (20 μl) was injected onto the HPLC column. The chromatographic separation was monitored by a fluorescence detector at an emission wavelength of 350 nm with an excitation wavelength of 225 nm. The direct precipitation of plasma protein using acetonitrile gave a good recovery for both naproxen and the internal standard. The detection limit was 0.1 μg/ml for naproxen. The intra- and inter-assay coefficients of variation at different concentrations evaluated were less than 10%.     

反相-高效液相色谱手性流动相添加剂法测定酸奶及含乳饮料中乳酸对映异构体

选取2,3,6-三甲基-β-环糊精（TM-β-CD）作为流动相手性添加剂,建立了采用反相高效液相色谱法分离酸奶及含乳饮料中乳酸异构体的方法。实验采用hypersil ODS2-C18（250×5．0mm,5μm）色谱柱,以0．5mmol／L PH2．5的TM-β-CD（含4．5mmol／L H2SO4）作为流动相,流速为1．0mL／min,紫外检测波长为210nm。实验考察了不同色谱柱、柱平衡时间、手性流动相添加剂浓度及pH值对分离效果的影响,并进一步研究了方法的线性范围、检出限、精密度及回收率。     

Development and validation of a simple and efficient HPLC method for the determination of zonisamide in pharmaceuticals and human plasma

A simple and efficient liquid chromatographic method has been developed and validated for the determination of zonisamide in pharmaceuticals and human plasma. Plasma samples are analyzed after one step protein precipitation with methanol, and chromatographic separation of zonisamide and chloramphenicol (internal standard) is carried out using a C₁₈ column and the optimum mobile phase of acetonitrile/methanol/distilled water (20: 10: 70, v/v/v). The method is validated in both mobile phase and human plasma, and the obtained limits of quantification values are 0.099 and 0.12 μg/mL in mobile phase and human plasma, respectively. Fully validated method is reproducible and selective for the determination of zonisamide in pharmaceuticals and human plasma.     

Determination of 1-hydroxypyrene in human urine by HPLC with electrochemical detection at a boron-doped diamond film electrode

A high-performance liquid chromatographic method with electrochemical detection (HPLC-ED) at a boron-doped diamond film electrode with preliminary separation and preconcentration by solid-phase extraction (SPE) has been developed for the determination of 1-hydroxypyrene (1-HP) in human urine. 1-HP is among the most widely used biomarkers of exposure to polycyclic aromatic hydrocarbons. Optimal HPLC-ED conditions have been found: mobile phase methanol-0.05 mol L(-1) phosphate buffer pH 5.0 (80:20, v/v), detection potential +1,000 mV versus Ag/AgCl (3 mol L(-1) KCl), and flow rate 0.8 mL min(-1). For SPE, LiChrolut(?) RP-18 E cartridges were used. The extraction yield was (87.0 ± 5.8)% (n = 5). The concentration dependence of 1-HP was measured in the concentration range from 0.01 to 10 μmol L(-1) (2.18-2,180 μg L(-1)) using methanolic solutions resulting from the SPE pretreatment of spiked human urine samples. The limit of detection (signal-to-noise ratio 3) and the limit of quantification (signal-to-noise ratio 10) of the biomarker were 0.013 μmol L(-1) (2.84 μg L(-1)) and 0.043 μmol L(-1) (9.39 μg L(-1)), respectively, which is sufficient for its determination in the urine of persons exposed to polycyclic aromatic hydrocarbons.     

Determination of insulin in humans with insulin-dependent diabetes mellitus patients by HPLC with diode array detection

A simple and reliable high-performance liquid chromatographic method with diode array detection has been developed and validated for the determination of insulin in human plasma. A good chromatographic separation was achieved on a C18 column with a mobile phase consisting of acetonitrile and 0.2M sodium sulfate (pH 2.4), 25:75 (v/v). Its flow rate was 1.2 mL/min. Calibration curve was linear within the concentration range of 0.15-25 μg/mL. Intra-day and inter-day relative standard deviations for insulin in human plasma were less than 6.3 and 8.5%, respectively. The limits of detection and quantification of insulin were 0.10 and 0.15 μg/mL, respectively. Also, this assay was applied to determine the pharmacokinetic parameters of insulin in eight insulin-dependent diabetes mellitus patients after subcutaneous injection of 25 IU of Actrapid HM.     

高效液相色谱手性固定相法拆分阿折地平对映体

建立了阿折地平对映体的高效液相色谱拆分方法。采用Chiralpak AD-H (250 mm×4.6 mm, 5.0 μm, Daicel公司)手性色谱柱在正相条件下直接拆分阿折地平对映体,考察了固定相种类、流动相组成及柱温等对阿折地平对映体分离的影响。确定了最佳的拆分条件: 流动相为正己烷-异丙醇(90:10, v/v),流速为0.8 mL/min,检测波长为254 nm;柱温为20 ℃;在此条件下阿折地平对映体的分离度为3.3。该法简单快速,重现性好。     

Determination of the cephalosporin Ro 13-99041 in plasma,urine, and bile by means of ion-pair reversed phase chromatography

An HPLC method has been developed for the determination of the cephalosporin antibiotic Ro 13-9904 in plasma, urine, and bile of dogs and of human volunteers using the technique of ion-pair chromatography with a LiChrosorb RP-18 column. The three mobile phases employed contained tetrapentyl-, tetraoctyl- and hexadecyltrimethyl-ammonium bromide, respectively, as lipophilic counterions. The chromatographic conditions chosen allowed simple and rapid sample preparation. Plasma was deproteinized with ethanol and the supernatant was directly injected onto the column; urine and bile were diluted with mobile phase and injected without any purification. The detection limit for the cephalosporin was about 0.5 μg/ml for plasma samples and approximately 5 μg/ml for bile and urine.     

手性高效液相色谱法测定板蓝根中表告依春和告依春含量

采用Chiralpak IC手性柱(250 mm×4.6 mm, 5 μm),建立了正相高效液相色谱测定板蓝根中表告依春(R-告依春)和告依春(S-告依春)含量的方法。考察了流动相组成、流速和柱温对分离度的影响。经优化后的实验条件: 以正己烷-异丙醇(体积比为90:10)为流动相,流速为0.8 mL/min;检测波长为245 nm,柱温为20 ℃。在此优化条件下,表告依春和告依春分离度为3.4,检出限为2.0 mg/L,在0.02～2.0 g/L范围内有良好的线性关系,平均回收率为101%,相对标准偏差(RSD)小于3.0%(n=6)。本方法可将具有抗病毒活性的表告依春与其对映体告依春基线分离并测定,专属性强,能有效控制板蓝根的质量。     

Capillary liquid chromatography with UV detection using N,N-diethyl dithiocarbamate for determining platinum-based antitumor drugs in plasma

A capillary liquid chromatography with UV detection (CLC-UV) system has been developed for determining platinum-based antitumor drugs (e.g., cisplatin, carboplatin, and nedaplatin) in plasma based on the pre-column derivatization of platinum with N,N-diethyl dithiocarbamate (DDTC). The chelated platinum separation was carried out on a capillary column (Inertsil ODS-3, 150 mm × 0.3 mm i.d., 3 μm) using an acetonitrile-water mixture (8:2, v/v) as a mobile phase that flowed at 5.0 μL/min. Detection was carried out by absorbance at 254 nm. Chromatographic peak height was found to be linearly related to the spiked concentration of nedaplatin in the blank control plasma from 5.0 ng/mL to 15 μg/mL (r(2)>0.998). The repeatability (n=5) of the chromatographic peak height for 2.5 μg/mL nedaplatin was 2.6% relative standard deviation (R.S.D.). The CLC-UV system, which required only 20 μL of plasma sample, was applied to the determination of total and free form platinum-based antitumor drugs in plasma after injection into rats. The recovery rates (n=5) of total and free form nedaplatin in plasma were 98% and 99%, respectively, and these repeatability were 2.4% R.S.D. and 3.1% R.S.D., respectively. In addition, the recovery rates (n=5) of total and free form carboplatin in plasma were 99% and 99%, respectively, and these repeatability were 2.9% R.S.D. and 0.24% R.S.D., respectively. The concentration-time profiles of total and free form nedaplatin in rat plasma were monitored to determine the pharmacokinetic parameters.