HPLC法同时测定小儿磺胺甘草合剂中两组分含量

目的：建立测定小儿磺胺甘草合剂中磺胺嘧啶及磺胺二甲嘧啶含量的方法。方法：采用高效液相色谱法,色谱柱为DiamonsilC18（250mm×4．6mm,5μm）,流动相：甲醇旬．02mol·L-1磷酸二氢钾（用磷酸调节pH至3．5）（30：70）,流速：0．9ml·min-1,检测波长：265am,柱温：40℃,进样量：lO斗l。结果：磺胺嘧啶和磺胺二甲嘧啶分别在6．03～60．32μg·ml-1和6．91～69．12μg·ml-1范围内线性关系良好;磺胺嘧啶的平均回收率为99．3％（RSD=0．63％）,磺胺二甲嘧啶的平均回收率为99．4％（RSD=0．22％）。结论：该方法快速、结果准确可靠,适用于小儿磺胺甘草合剂的含量测定。     

免疫层析法测定动物源性食品中磺胺嘧啶残留

建立了动物源性食品中磺胺嘧啶残留的免疫层析快速测定方法。用胶体金标记磺胺嘧啶单克隆抗体作为显色剂，磺胺嘧啶竞争物包被于硝酸纤维素层析膜上作为捕获试剂，采用竞争反应模式制成胶体金免疫层析试纸。该免疫层析试纸可以在15min内完成对磺胺嘧啶残留的半定量检测。读条系统判定灵敏度为5ng／ml，肉眼判定检测限灵敏度为10ng／ml，与其它磺胺类药物无交叉反应。该方法在不同动物源性食品（鸡肉、鸡蛋、鸡肝、猪肉、猪肝、牛奶、蜂蜜）中添加磺胺嘧啶的回收率在68．1％-118．8％范围内。动物试验样品检测结果表明，该方法与ELISA及HPLC具有好的符合率。该方法灵敏度高，检测准确、简便、快速，有良好的开发应用前景。     

HPLC法测定联磺甲氧苄啶片中三种组分的含量

目的:建立了高效液相色谱法测定联磺甲氧苄啶片中磺胺甲噁唑、磺胺嘧啶与甲氧苄啶的含量.方法:采用Kro-masil TMC18柱,以水-乙腈-三乙胺(800:200:1),用0.2mol·L-1氢氧化钠和稀醋酸调pH值至6.6±0.1为流动相,流速1ml·min-1,检测波长为210nm,结果:磺胺甲噁唑、磺胺嘧啶的线性范围均为10.0～100.0μg·ml-1,甲氧苄啶的线性范围4.0～40.0μg·ml-1,平均回收率分别为99.9%(RSD=0.68%)、99.6%(RSD=0.77%)和99.7%(0.74%).结论:本方法快速、简便、准确,可作为该制剂质控标准.     

消炎灵胶囊的制备和质量控制

目的建立消炎灵胶囊的制备工艺及质量控制方法.方法用磺胺嘧啶、碳酸氢钠、冰片制备成胶囊,以0.05 mol·L-1磷酸二氢钾溶液一甲醇(6040,V/V)为流动相,采用高效液相色谱法测定该胶囊中磺胺嘧啶的含量.结果所得胶囊的内容物呈类白色粉末状;磺胺嘧啶在10.0～100.μg·ml-1浓度范围内与峰面积积分值线性关系良好(r=0.999 9);平均回收率为99.61%,RSD为0.68%(n=9).结论该制剂组方合理,制备工艺简单,含量测定方法简便、可靠,可用于制剂质量控制.     

反相高效液相色谱法测定复方磺胺嘧啶分散片中磺胺嘧啶的含量

目的：建立反相高效液相色谱法（RP-HPLC）测定复方磺胺嘧啶分散片中磺胺嘧啶的含量。方法：采用C18（200 mm×4.6 mm,5μm）色谱柱;流动相：0.05 mol/L磷酸二氢钾溶液-甲醇（60∶40）;检测波长：242 nm;柱温：30℃。结果：磺胺嘧啶进样量在10～90μg/ml范围内与峰面积呈良好的线性关系（r=0.999 7）;磺胺嘧啶平均加样回收率为99.9%,RSD为2.7%。结论：该方法准确、简便,可用于复方磺胺嘧啶分散片中磺胺嘧啶含量的测定。     

反相高效液相色谱法测定复方磺胺嘧啶滴鼻液中磺胺嘧啶和盐酸麻黄碱含量

目的建立了一种反相高效液相色谱-紫外检测法用于复方磺胺嘧啶滴鼻液中磺胺嘧啶和盐酸麻黄碱的含量测定。方法色谱柱为Zorbax Bonus RP C18(150 mm×4.6 mm,5μm),流动相为0.050 mol.L-1磷酸二氢钾溶液(含0.5%三乙胺,用磷酸调节pH值至2.3)-甲醇(80∶20),盐酸麻黄碱的检测波长为216 nm,磺胺嘧啶为265 nm。结果磺胺嘧啶和盐酸麻黄碱分别在3.3~33.6μg.mL-1,6.0~60.7 5μg.mL-1峰面积和浓度呈线性关系,相关系数均为0.999 6,磺胺嘧啶和盐酸麻黄碱的平均回收率分别为101.1%和100.0%。以文献方法作为参考方法,通过F-检验核对了定量方法的精密性,磺胺嘧啶和盐酸麻黄碱的两方法平均偏差的比值均接近于1.0。结论该分析方法准确、稳定,可用于复方磺胺嘧啶滴鼻液的质量控制。     

高效液相色谱法测定联磺甲氧苄啶片中3组份的含量

目的:建立采用高效液相色谱法(HPLC)测定联磺甲氧苄啶片中磺胺甲卟恶唑,磺胺嘧啶和甲氧苄啶的含量.方法:色谱柱为Diamonsil (TM) C18(5 μm, 200 mm×4.6 mm),流动相为乙腈∶水∶磷酸(50∶50∶0.1),每1000 mL流动相中加十二烷基硫酸钠3.5 g,流速1 mL*min-1,检测波长为257 nm.结果:磺胺甲卟恶唑、磺胺嘧啶和甲氧苄啶3种成分的回收率分别为99.78%,99.82%,99.90%.结论:方法简便,结果准确可靠.     

HPLC法同时测定复方磺胺甲噁唑片中磺胺甲噁唑和甲氧苄啶的含量△

目的:建立并优化同时测定复方磺胺甲噁唑片中磺胺甲噁唑和甲氧苄啶的含量的高效液相色谱方法。方法:采用Diamonsil-C18(150mm×4.6mm,5μm)色谱柱,乙腈-0.1%三乙胺水溶液(磷酸调pH至6.0)(80:20v/v)为流动相,流速为1.0ml.min-1,检测波长为240nm。结果:磺胺甲噁唑与甲氧苄啶分别在为10～100μg.ml-1(r=0.9995)和2～20μg.ml-1(r=0.9993)范围内线性关系良好,平均回收率(n=9)分别为97.6%和99.7%,仪器精密度的RSD分别为1.7%和1.4%,并采用以上方法对市售复方磺胺甲噁唑片中的磺胺甲噁唑和甲氧苄啶进行含量测定。结论:本方法较已报道的方法更加准确、快速,灵敏度更高,可为复方磺胺甲噁唑片的质量控制提供更为可靠的方法。     

HPLC-串联四级杆质谱法测定功能食品中的利尿剂

目的 采用HPLC-串联四级杆质谱法专属测定功能食品中违禁添加的呋塞米、氢氯噻嗪、布美他尼利尿剂.方法 样品在甲醇一超声波提取、微孔滤膜过滤后,经HPLC分离、串联四级杆质谱一负离子多反应监测方式检测,通过相对分子质量、二级质谱碎片信息定性、标准曲线法定量,同时测定了功能食品中的呋塞米、氢氯噻嗪和布美他尼.结果 呋塞米和氢氯噻嗪的方法检测限(S/N=3)为0.5 ng·ml-1,布美他尼的为1.0 ng·ml-1;呋塞米的最低定量限(S/N=10)为4 ng·ml-1,氢氯噻嗪的为1 ng·ml-1,布美他尼的为4.5 ng·ml-1.方法 的RSD均小于0.31%,平均回收率为86.0% ～107.0%.在8种被检功能食品中,1种被检出掺有氢氯噻嗪.结论 所建方法选择性强、灵敏度高,可作为检测功能食品中非法掺人呋塞米、氢氯噻嗪和布美他尼利尿剂的有效方法.     

HPLC同时测定复方磺棕合剂中的3种组分

目的 建立测定复方磺棕合剂中磺胺甲噁唑、磺胺嘧啶和甲氧苄胺嘧啶的方法.方法 采用HPLC法,色谱柱为Hypersil C18柱(200 mm×4.6 mm,5 μm),0.025 mol·L-1磷酸-乙腈(75:25)为流动相,检测波长220 nm.结果 磺胺甲噁唑、磺胺嘧啶和甲氧苄胺嘧啶的线性范围分别为0.10～2.00 μg(r＝0.9998)、0.10～2.00 μg(r＝0.9998)和0.02～0.40 μg(r＝0.9998),回收率分别为99.37%(RSD＝0.98%)、102.75%(RSD＝1.01%)和100.47%(RSD＝1.21%).结论 所建方法快速、简单、重复性好.     

API-ionspray MS and MS/MS study on the structural characterization of bisbenzylisoquinoline alkaloids

API-ionspray MS and MS/MS techniques have been utilized to elucidate the structures of 20 bisbenzylisoquinoline alkaloids, consisting of 17 diether and three monoether links of two benzyltetrahydroisoquinoline units, which were isolated and identified previously from a variety of Thalictrum sp. (Ranunculaceae family). Apparent protonated molecular ions ([M+H](+)) and very intense doubly-protonated molecular ion ([M+2H](++), 100% of relative abundance) in Q1 Scan MS spectra and prominent as well as diagnostic product ions for the structural information in MS/MS spectra were observed in nanogram quantities for all investigated alkaloids.     

LC/MS/MS的多反应监测方法定量测定灯盏乙素

目的：建立一种可靠的灯盏乙素定量分析方法。方法：用三级四极串联质谱(MS/MS)作为HPLC的检测器,其中MS/MS使用了多反应监测(MRM)扫描方式。选择母→子离子对m/z -461→m/z -285作为MRM监测的离子对;HPLC流动相为100％甲醇,流速0.9 mL.min^-1,色谱柱Beckman ODS-1。以测定短葶飞蓬提取物的灯盏乙素含量为例,对此方法进行了应用。结果：灯盏乙素在短葶飞蓬提取物中含量为6.98%。方法线性范围20～160 ng.mL^-1 (γ=0.999);加入灯盏乙素标准品20,60和160 ng的加样回收率分别为：96.5%,97.4%和97.3%。检测限为1 ng,每个样品的分析时间为4 min。结论：此法灵敏、快速、准确,可应用于灯盏乙素的各种药剂、药代的研究。     

System suitability in bioanalytical LC/MS/MS

System suitability is widely recognized as a critical component of bioanalysis. This paper discusses a generic system suitability test that monitors instrument performance throughout a run when used for liquid chromatography tandem mass spectrometry (LC/MS/MS) in bioanalysis. This system suitability process is designed to ensure that the LC/MS/MS system is performing in a manner that leads to the production of accurate and reproducible data that can be submitted with confidence to regulatory agencies. This process contains tests for signal stability, carryover, and instrument response. This approach is integrated throughout an analytical run and has been used in the analysis of over 25,000 batches of clinical samples. Two case studies are presented in which quality control samples and standards meet all acceptance criteria (based on Standard Operating Procedures and the Food and Drug Administration's recommendations for bioanalytical method validation) but failed the proposed system suitability test, and thus were rejected. In these case studies, the concentrations of a significant number of clinical samples (over 35%) were affected, resulting in changes of more than 15% when the samples were reanalyzed. These data indicate that the poor performance of an LC/MS/MS system could adversely affect the calculated concentrations of unknown samples even though the results for quality control samples appear to be acceptable.     

LC/MS/MS与GC/MS法分析鉴定小鼠尿中沙美特罗的代谢产物

目的:鉴定沙美特罗在小鼠尿中的主要代谢产物.方法:ig给药后,收集小鼠尿液,经固相提取,葡萄糖醛酸酶水解,进行LC/MS/MS分析和硅烷化后进行GC/MS分析同时分离鉴定沙美特罗代谢产物.结果和结论:在给药后尿样中发现沙美特罗原型和4种代谢产物M1～M4,其结构推测为19-羟基沙美特罗(M1)、2-羰基沙美特罗(M2)、19-羰基沙美特罗(M3)和19-羟基-8-甲氧基沙美特罗(M4).     

Analysis of 'SHENMAI' injection by HPLC/MS/MS

An HPLC/MS/MS method was developed for the analysis of 'SHENMAI' injection, composed of red ginseng and ophiopogon. The constituents of 'SHENMAI' were found to be similar with those of ginseng and 39 ginsenosides were detected. By the studies of MS and MS/MS spectra and the comparison with literature data, most of these ginsenosides were identified. Based on this study, suggestions were put forward to improve the quality control system of 'SHENMAI' injection.     

液相色谱-串联质谱法快速测定人血浆中伊曲康唑

目的:建立灵敏、快速的液相色谱-串联质谱法测定人血浆中伊曲康唑,并用于药代动力学研究。方法:血浆样品经乙腈沉淀蛋白后,以乙腈-水-甲酸(80:20:0.2,v/v/v)为流动相,流速0.50 mL·min~(-1),Zorbax sB C_(18)柱分离,采用电喷雾电离源,以选择反应监测(SRM)方式进行正离子检测。用于定量分析的离子反应分别为 m/z 705→m/z(392 432)(伊曲康唑)和m/z 256→m/z 167(内标,苯海拉明)。结果:测定血浆中伊曲康唑的线性范围为1.00～1000 ng·mL~(-1),定量下限为1.00 ng·mL~(-1)。日内、日间精密度(RSD)均小于7.2%,准确度(RE)在±3.0%以内。应用本法测得20名健康受试者单剂量口服200mg 伊曲康唑胶囊后的主要药动学参数为:T_(max)(4.25±1.02)h,C_(max)(155.5±73.3)ng·mL~(-1),t_(1/2)(20.4±11.4)h;用梯形法计算,AUC_(0-84h)(2257±1168)ng·h·mL~(-1),AUC_(0-∞)(237.1±1207)ng·h·mL~(-1)。结论:该法选择性强、灵敏度高、操作简便,适用于伊曲康唑的临床药代动力学研究。     

超高压液相/电喷雾-LTQ-Orbitrap质谱联用技术分析三七根中皂苷类成分

建立三七药材的UPLC-ESI-HRMS定性分析方法。采用Kinetics色谱柱,梯度洗脱,经DAD检测器后采用ESI-LTQ-Orbitrap质谱负离子模式采集,三七成分的一级全扫描离子在离子阱内进行CID多级质谱,FT检测高分辨质谱数据进行分析。结果表明三七皂苷成分分离良好,根据多级质谱碎片信息和精确相对分子质量信息,结合文献,从三七中鉴定分析了43个成分,并首次从三七中检测到新型的三七皂苷母核和乙酰取代皂苷成分。本方法分离度良好、灵敏度高,可用于三七药材的定性分析,并有助于对三七进行进一步的活性成分研究和质量控制。     

LC／MS／MS技术对西他沙星代谢物结构的研究

利用LC／MS／MS实现对西他沙星体内代谢物的在线鉴定,并通过定向合成的代谢物对照品,对西他沙星代谢物的结构作了进一步验证。结果鉴定出六个代谢物D2～D7。根据代谢物的结构特征证明了西他沙星在肝脏经氧化被代谢消除。     

Determination of a selection of synthetic cannabinoids and metabolites in urine by UHPSFC‐MS/MS and by UHPLC‐MS/MS

Two different analytical techniques, ultra‐high performance supercritical fluid chromatography‐tandem mass spectrometry (UHPSFC‐MS/MS) and reversed phase ultra‐high performance liquid chromatography‐tandem mass spectrometry (UHPLC‐MS/MS), were used for the determination of two synthetic cannabinoids and eleven metabolites in urine; AM‐2201 N‐4‐OH‐pentyl, AM‐2233, JWH‐018 N‐5‐OH‐pentyl, JWH‐018 N‐pentanoic acid, JWH‐073 N‐4‐OH‐butyl, JWH‐073 N‐butanoic acid, JWH‐122 N‐5‐OH‐pentyl, MAM‐2201, MAM‐2201 N‐4‐OH‐pentyl, RCS‐4 N‐5‐OH‐pentyl, UR‐144 degradant N‐pentanoic acid, UR‐144 N‐4‐OH‐pentyl, and UR‐144 N‐pentanoic acid. Sample preparation included a liquid‐liquid extraction after deconjugation with ß‐glucuronidase. The UHPSFC‐MS/MS method used an Acquity UPC^{2 TM} BEH column with a mobile phase consisting of CO₂ and 0.3% ammonia in methanol, while the UHPLC‐MS/MS method used an Acquity UPLC® BEH C₁₈ column with a mobile phase consisting of 5 mM ammonium formate (pH 10.2) and methanol. MS/MS detection was performed with positive electrospray ionization and two multiple reaction monitoring transitions. Deuterated internal standards were used for six of the compounds. Limits of quantification (LOQs) were between 0.04 and 0.4 µg/L. Between‐day relative standard deviations at concentrations ≥ LOQ were ≤20%, with biases within ±19%. Recoveries ranged from 40 to 90%. Corrected matrix effects were within 100 ± 10%, except for MAM‐2201 with UHPSFC‐MS/MS, and for UR‐144 N‐pentanoic acid and MAM‐2201 N‐4‐OH‐pentyl with UHPLC‐MS/MS. Elution order obtained by UHPSFC‐MS/MS was almost opposite to that obtained by UHPLC‐MS/MS, making this instrument setup an interesting combination for screening and confirmation analyses in forensic cases. The UHPLC‐MS/MS method has, since August 2014, been successfully used for confirmation of synthetic cannabinoids in urine samples revealing a positive immunoassay screening result. Copyright © 2015 John Wiley & Sons, Ltd.