超高效液相色谱-四级杆飞行时间串联质谱快速分析复方守宫散化学成分及血中移行成分

目的 采用超高效液相色谱-四级杆飞行时间质谱(ultra-performance liquid chromatogra-phy/quadrupole time-of-flight-tandem mass spectrometry,UPLC-Q-TOF/MS)对复方守宫散中化学成分及其血中移行成分进行定性分析,为该制剂的...     

苦丁茶提取物质量分析

目的 对苦丁茶药材水提物进行质量分析。方法 以槲皮素、山柰素作为对照品,采用薄层色谱法对苦丁茶药材中黄酮类化合物进行定性鉴别;采用反相高效液相色谱法测定苦丁茶药材中槲皮素和山柰素含量。结果 薄层色谱鉴别结果表明,供试品色谱中在与对照品色谱相应的位置上,显现相同颜色的斑点。槲皮素、山柰素进样量分别在0.1～3.2 μg、0.01～0.32 μg范围内,与峰面积线性关系良好（槲皮素r1＝0.999 9;山柰素r2＝0.999 8）,槲皮素及山柰素的平均加样回收率分别为102.34%和101.24%,RSD分别为3.26%和3.15%(n＝9)。结论 薄层色谱法和反相高效液相色谱法简便、准确,重复性好,可作为苦丁茶药材水提物的质量分析方法。     

超高液相色谱法测定桔梗饮片和桔梗配方颗粒中桔梗皂苷D含量

目的 采用超高效液相色谱法建立桔梗饮片及桔梗配方颗粒中桔梗皂苷D的含量测量方法,为桔梗配方颗粒的质量控制提供实验依据。 方法 采用Waters Acquity UPLC HSS T3柱（2.1 mm×50 mm,μm）,以乙腈和水为流动相,梯度洗脱,流速 0.25 mL/min,检测波长210 nm,柱温29 ℃。 结果 桔梗皂苷D进样量在0.504~2.520 μg范围内与峰面积的线性关系良好,平均加样回收率为99.89%,RSD为1.64%;桔梗饮片和桔梗配方颗粒中桔梗皂苷D的含量具有差异。 结论 本实验所建立的测定方法简便、准确、可靠,可用于桔梗饮片和桔梗配方颗粒中桔梗皂苷D含量的检测。     

栀子苷在正常大鼠体内的药物代谢动力学和组织分布

目的 研究栀子苷(Jasminoidin,JA)在正常大鼠血浆中的药物代谢动力学和在肝、脾、肾、脑中的分布情况.方法 采用phenomenex C18色谱柱(4.6 mm×250 mm, 5 μm),流动相为乙腈-0.1%磷酸(20∶80),流速0.8 ml/min,检测波长238 nm,柱温30 ℃.大鼠按JA单剂量...     

HPLC测定复方丹皮酚凝胶中丹皮酚含量

目的:建立复方丹皮酚凝胶中丹皮酚的含量测定方法.方法:采用高效液相色谱法,色谱柱为SHIMADZU VP-ODS(4.6 mm×150 mm, μm),流动相为甲醇-水(50∶50),检测波长为274 nm.结果:丹皮酚进样量为0.05～0.30 μg时呈良好的线性关系(r =0.999 8).平均回收率为100%,SD为0.87%(n =5).结论:PLC法可用于复方丹皮酚凝胶的质量控制.     

Identification of furosemide in hair in a post‐mortem case by UHPLC‐MS/MS with guidance on interpretation

Testing for drugs in hair raises several difficulties. Among them is the interpretation of the final concentration(s). In a post‐mortem case, analyses revealed the presence of furosemide (12 ng/mL) in femoral blood, although it was not part of the victim's treatment. The prosecutor requested our laboratory to undertake an additional analysis in hair to obtain information about the use of furosemide. A specific method was therefore developed and validated to identify and quantify furosemide in hair by UHPLC‐MS/MS. After decontamination of 30 mg of hair, incubation in acidic condition, extraction with ethyl acetate, the samples were analyzed by UHPLC‐MS/MS. Furosemide was found in the victim's hair at 225 pg/mg. However, it was not possible to interpret this concentration due to the absence of data in the literature. Therefore, the authors performed a controlled study in two parts. In order to establish the basis of interpretation, several volunteers were tested (four after a single 20 mg administration and twenty‐four under daily treatment). The first part indicated that a single dose is not detectable in hair using our method. The second part demonstrated concentrations ranging from 5 to 1110 pg/mg with no correlation between dosage and hair concentrations. The decedent's hair result was interpreted as repeated exposures. In the case of furosemide analysis, hair can provide information about its presence but cannot give information about dosage or frequency of use.     

益肾蠲痛口服液治疗绝经后骨质疏松症临床观察

目的 观察益肾蠲痛口服液治疗肾阳虚型绝经后骨质疏松症（postmenopausal osteoporosis,PMOP）的临床疗效。方法 将120例肾阳虚型PMOP患者随机分为治疗组和对照组,每组60例。两组患者均口服钙尔奇,治疗组患者加服益肾蠲痛口服液,对照组患者加服骨康口服液,疗程均为12个月,随访24个月。治疗前后及随访时,分别采用视觉模拟评分法（visual analogue scale,VAS）评价腰背疼痛,采用双能X线检测骨密度（bone mineral density,BMD）;并观察两组中医证候疗效及脆性骨折发生情况。结果 治疗后,两组VAS评分均较治疗前显著降低（P<0.01）;腰椎、股骨颈、Ward三角BMD均较治疗前显著上升（P<0.01）;随访时,治疗组VAS下降值及腰椎（L2—4）、股骨颈、Ward三角BMD升高值均显著大于对照组（P<0.01）。两组中医证候疗效及脆性骨折复发率比较,差异均无统计学意义（P>0.05）。结论 益肾蠲痛口服液可减轻PMOP患者腰背疼痛,提高BMD,改善中医症状,防止脆性骨折复发,在减轻腰背疼痛和提高BMD方面较对照药具有明显优势。     

液相色谱-质谱联用法测定复方氨酚烷胺胶囊人体生物等效性

目的 研究复方氨酚烷胺胶囊的人体生物等效性。方法 采用双周期交叉实验设计,22名健康男性受试者随机交叉单剂量口服复方氨酚烷胺胶囊试验制剂和参比制剂各1粒。采用液相色谱-质谱联用法测定血浆中对乙酰氨基酚（paracetamol, PAR）、金刚烷胺（amantadine, AMA）、马来酸氯苯那敏（chlorphenamine, CHL）和咖啡因（caffenine, CAF）的浓度,采用DAS3.2.5软件计算药物代谢动力学参数,并采用双侧t检验法和90%置信区间比较主要药物代谢动力学参数（cmax,tmax,t1/2和AUC0-t）。结果 受试制剂和参比制剂中PAR、AMA、CAF和CHL的AUC0→t、AUC0→∞、cmax和tmax比较,差异均无统计学意义（P>0.05）。结论 本实验方法准确、灵敏、简便,两种制剂具有生物等效性。     

歙白术与其他产地白术中白术内酯类成分含量比较

目的 以白术内酯类成分为评价指标,比较歙白术与其他产地白术的质量差异。方法 采用高效液相色谱法同时测定安徽、浙江5个产地白术药材中白术内酯Ⅰ、Ⅱ、Ⅲ的含量。色谱柱：Agilent TC-C18(4.6 mm×250 mm,5 μm);流动相：甲醇-水(70∶30);检测波长：白术内酯Ⅰ、Ⅲ的检测波长为220 nm,白术内酯Ⅱ的检测波长为276 nm;流速：1.0 ml/min;柱温：室温;进样量：20 μl。结果 歙白术中白术内酯Ⅱ的含量显著高于其他产地白术。结论 白术内酯类成分可作为不同产地白术质量的评价指标。     

Segmental hair analysis for flunitrazepam and 7-aminoflunitrazepam in users: a comparison to existing literature

The availability of more quantitative data on flunitrazepam (FLU) and 7-aminoflunitrazepam (7AF) would aid in obtaining a better understanding of the interpretation of FLU concentrations in human hair. The purpose of this study was to provide concentrations of FLU and 7AF in hair segments of 22 FLU users. Quantitative data regarding hair concentrations of FLU and 7AF from various types of cases were also reviewed to give a comprehensive overview of the comparability of different studies. Three to six 1 cm segments of scalp hair from 22 FLU users were analyzed by a liquid chromatography–tandem mass spectrometry (LC–MS/MS) method. FLU and its metabolite were confirmed in the hair segments from all cases. Concentrations of FLU and 7AF in the segments ranged from 0.01–0.16 ng/mg (median of 0.03) and 0.01–0.34 ng/mg (median of 0.09), respectively. Most cases had FLU and 7AF distributions along the hair segments that were suggestive of repeated drug use. A summary of the published concentrations gives valuable data and can assist forensic investigators in their estimations of drug use history and patterns.

Key points

• A method using LC–MS/MS to quantify flunitrazepam and its metabolite was described.
• Segmental analysis of flunitrazepam and its metabolite in human hair was reported.
• A comprehensive overview of quantitative data was given.