二维超高效液相色谱质谱联用技术测定注射用头孢地嗪钠的杂质谱

目的 建立二维超高效液相色谱质谱联用法研究注射用头孢地嗪钠的杂质谱。方法 一维色谱采用Waters HSS T3 C18(100mm×2.1mm, 1.8μm);以磷酸盐缓冲液(取磷酸二氢钾0.87g,无水磷酸氢二钠0.22g,加水溶解并稀释至1000mL)为流动相A,乙腈为流动项B,梯度洗脱;柱温：35℃;流速：0.4mL/min;检测波长：215nm;进样量：3μL;二维色谱采用Waters BEH C18(50mm×2.1mm, 1.7μm);以0.1%甲酸水溶液为流动相A,0.1%甲酸的乙腈为流动项B,切峰后开始B相3min由2%到95%;柱温：35℃;流速：0.4mL/min;质谱采用Xevo G2-XS QTof MS系统,离子源为ESI源,离子源温度：110℃,毛细管电压：3.0KV,雾化器温度：450℃,雾化器流速：800L/h,扫描范围：m/z 100~2000,测定头孢地嗪主要杂质的一级和二级质谱,进行结构解析。结果 采用UPLC梯度洗脱方法可检出多种头孢地嗪异构体、降解杂质和高分子杂质等,检出杂质的个数和总量均较现行法定标准多。结论 本品的杂质在原料合成、制剂分装及运输储藏过程中均可产生,因此,应对原料和制剂生产过程中的关键技术指标和环境条件加以控制。     

UPLC-MS/MS法同时测定人血浆中地佐辛和罗哌卡因的浓度

目的 建立一种人血浆中地佐辛和罗哌卡因浓度测定的UPLC-MS/MS法.方法 血浆样品经乙腈沉淀蛋白后提取处理,以利多卡因为内标.色谱柱:Agilent Zorbax Eclipse Plus C18;流动相:0.1％甲酸铵溶液-甲醇(75:25,用甲酸调节pH至4.5),流速:0.2 mL·min-1,柱温:35℃,...     

UPLC-MS法测定艾滋合并结核患者血浆中替诺福韦浓度

目的:建立血浆中替诺福韦(tenofovir,TFV)含量测定的方法,测定艾滋合并结核患者给药后血浆中替诺福韦的浓度.方法:血浆采用甲醇沉淀蛋白,色谱柱为Kinetex Phenyl-Hexyl(50 mm×3.0 mm,2.6μm),流动相为5 mmol·L-1甲酸铵溶液(A)-甲醇溶液(B),每个样品分析时间为3....     

Potential Health Risk Associated with Mycotoxins in Oat Grains Consumed in Spain

Spain is a relevant producer of oats (Avena sativa), but to date there has been no study on the occurrence/co-occurrence of mycotoxins in oats marketed in Spain. The present study is addressed to overcome this lack of knowledge. One hundred oat kernel samples were acquired across different Spanish geographic regions during the years 2015–2019 and analyzed for mycotoxin content using an ultra-high performance liquid chromatography electrospray ionization tandem mass spectrometry (UPLC–ESI–MS/MS) method and matrix-matched calibration. The focus was on the regulated mycotoxins although other relevant mycotoxins were considered. The percentage of incidence (levels ≥ limit of detection), mean and range (ng/g) of mycotoxins were as follows: zearalenone (66%, mean 39.1, range 28.1–153), HT-2 toxin (47%, mean 37.1, range 4.98–439), deoxynivalenol, (34%, mean 81.4, range 19.1–736), fumonisin B1 (29%, mean 157.5, range 63.2–217.4), and T-2 toxin, (24%, mean 49.9, range 12.3–321). Fumonisin B2, 3-acetyldeoxynivalenol, aflatoxins B1, B2, and G2, and ochratoxin A were also detected at low levels, but aflatoxin G1 was not. The maximum limits established by the European Commission for unprocessed oats were not exceeded, except for zearalenone (in one sample), and the sum of aflatoxins (in two samples). Mycotoxin co-occurrence at quantifiable levels in the same sample (two to five combinations) was found in 31% of samples. The most common mixtures were those of HT-2 + T-2 toxins alone or together with deoxynivalenol and/or zearalenone.     

在体皮肤微透析技术评价盐酸去甲异波尔定乳膏的透皮释药性能

目的采用微透析技术,考察盐酸去甲异波尔定(norisoboldine hydrochloride,NOR·HCl)乳膏大鼠经皮给药后的药物浓度变化,评价其透皮释药性能。方法建立NOR·HCl的UPLC-MS/MS含量测定方法,并进行专属性、稳定性、精密度及基质效应等方法学考察。大鼠腹部脱毛处理,局部给药,应用微透析技术,结合UPLC-MS/MS测定皮肤透析液中药物质量浓度,以NOR·HCl生理盐水溶液作为对照,比较其与NOR·HCl乳膏的药物浓度-时间曲线差异。结果以青藤碱(m/z 330→239)为内标,流速0.4 mL·min~(-1),柱温45℃,乙腈-0.1%甲酸为流动相梯度洗脱,多反应监测(MRM)模式检测,NOR·HCl(m/z 314→265)在1～520 ng·mL~(-1)范围内线性关系良好,R~2=0.997,方法学RSD均10%,基质效应在86.89%～100.80%,符合标准。NOR·HCl乳膏和生理盐水溶液给药后,微透析接受液中的药物达峰浓度(C_(max))分别为(110.60±22.28)和(37.63±1.01)ng·mL~(-1),药时曲线下面积(AUC_(0-10))分别为(511.17±4.78)和(88.20±1.45)ng·h·mL~(-1)。与生理盐水溶液相比,NOR·HCl乳膏可将药物透过皮肤的C_(max)提高2.94倍,AUC_(0-10)提高5.80倍。结论在体微透析技术可用于评价NOR·HCl乳膏的透皮释药性能;乳膏可显著提高NOR·HCl的皮肤透过量。     

白芍中芍药苷及其衍生物的UPLC-MS/MS分析

目的:采用超高效液相色谱与四级杆-线性离子阱串联质谱联用技术(UPLC-Q-Trap MS-MS)对白芍中单萜糖苷类成分进行分析和鉴别.方法:用Acquity UPLC BEH C18色谱柱,以0.1%甲酸水溶液(A)乙腈(B)为流动相梯度洗脱,使用ESI离子源,在负离子模式下采集数据,数据采集范围m/z100～1200,雾化气124.¨kPa,脱溶剂气103.43 kPa,气帘气206.85kPa;离子源温度为450℃;离子喷雾电压为-4.5 kV;结果:白芍中化学成分获得了较好的分离和检测,共推测出6个糖苷类化合物的化学结构;结论:该方法灵敏度高,分离度好,适用于白芍中单萜糖苷类成分的快速分析与结构鉴定.     

3种抗菌药物对辛伐他汀在人肝微粒体中代谢的影响

目的 体外研究人肝微粒体中罗红霉素、左氧氟沙星和氟康唑分别对辛伐他汀代谢的影响。方法 分别将罗红霉素、左氧氟沙星、氟康唑与辛伐他汀在人肝微粒体中共孵育,采用UPLC-MS/MS测定辛伐他汀的浓度。结果 罗红霉素和左氧氟沙星对辛伐他汀的代谢没有影响,氟康唑剂量依赖性抑制辛伐他汀的代谢,其IC₅₀值为36.6 μmol·L^-1。结论 氟康唑显著抑制辛伐他汀的代谢,罗红霉素与左氧氟沙星对辛伐他汀在人肝微粒体中代谢无明显药物相互作用。     

Quantification of rhynchophylline in rabbit plasma by UPLC-MS/MS and its application in a pharmacokinetic study

It was recently revealed thatRhynchophylline (Rhy), an important constituent of Uncaria rhynchophylla, possessed antihypertensive and neuroprotective effects. However, no information about the pharmacokinetics of Rhy in a herbivorous speciessuch as rabbit is available. Allometric scaling is valuable in designing human pharmacokinetic parameters from preclinical species. To investigate the characteristics of Rhy in vivo, a rapid and sensitive ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed and validated for the measurement of Rhy concentrations in rabbit plasma. The method was linear over the concentration range of 0.01–10.24 µg/mL. Intra-day and inter-day precision and accuracy were less than 8.0%. The recoveries were in the range of 94.17%–103.32%. Matrix effects (ME) were minor. After oral administration of Rhy at 20, 40 and 80 mg/kg, the mean elimination half-life (t_1/2) for these doses were 1.19, 1.49 and 1.37 h in rabbits, respectively. There was a proportionate increase in the maximum concentration (C_max) and the area under the blood concentration-time curve (AUC_∞) for three doses. The developed method was suitable for the study on pharmacokinetics of Rhy after oral administration and it may provide a valuable basis for clinical application of such a bioactive compound of herbal medicines.     

睡眠宝胶囊中非法掺入化学药品的检测方法研究

目的 建立薄层色谱结合超高压液相色谱-质谱联用法快速筛查及鉴定睡眠宝胶囊中非法掺加的氯氮平、地西泮、艾司唑仑。方法 采用硅胶GF254板,乙酸乙酯-无水乙醇-氨水(50∶2∶0.5)为展开剂,在254 nm下检视。色谱条件为：Aglient ZORBAX SB C₁₈柱(100 mm×2.1 mm,1.8 μm),流动相20 mmol·L^-1醋酸铵溶液-甲醇(50∶50),流速0.3 mL·min^-1,检测波长225 nm,柱温35 ℃,正离子扫描检测。结果 睡眠宝胶囊非法掺入氯氮平、地西泮、艾司唑仑在254 nm下显明显的斑点,通过UPLC-PDA-Q TOF MS可进一步快速确证。结论 本方法操作简便,结果可靠,可用于快速筛查及确证睡眠宝胶囊中非法掺入氯氮平、地西泮及艾司唑仑。     

UPLC-MS分析侧柏叶中黄酮类化合物

目的:采用超高效液相色谱-质谱仪联用技术(UPLC-MS)对侧柏叶中黄酮类成分进行分析和鉴别.方法:用Waters BEH C18柱(50 mm×2.1 mm,1.7μm).流动相为0.2%甲酸水溶液-甲醇梯度洗脱,使用ESI离子源,在负离子模式下采集数据.结果:推断出侧柏叶中11个黄酮类化合物,并探讨了黄酮类化合物的电喷雾/串联质谱(ESI-MS-MS)的裂解方式.结论:经过超高效液相色谱的分离,利用质谱测定提供的准确质量数,结合紫外光谱的信息可以鉴定侧柏叶中主要的黄酮类成分.探讨了黄酮类化合物的电喷雾/串联质谱(ESI-MS/MS)的裂解方式,为其成分鉴定提供了准确有效的方法.