Simultaneous Determination of 14 β-Receptor Agonists Residues in Mutton by High Performance Liquid Chromatography-Tandem Mass Spectrometry (HPLC-MS/MS)

[Objectives]A high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS)method was established for the determination of 14β-receptor agonist residues in mutton.[Methods]Samples were hydrolyzed byβ-glucuronidase and extracted with 5%acetic acid-acetonitrile(1:99,V/V)solution.An Eclipse plus C 18 column was used for separation,and the MRM mode was used for qualitative analysis,and the external standard method was used for quantitative analysis of matrix standard solutions.[Results]Under the optimal conditions,the retention time of the 14 kinds ofβ-receptor agonists ranged from 1.0 to 9.5 min.When the mass concentration was in the range of 0.05-0.50μg/ml,the linear relationship ofβ-receptor agonists was good,with correlation coefficients(r)≥0.9992.The detection limits of the method were in the range of 0.04-0.87μg/kg,and the quantitative limits were in the range of 0.35-1.86μg/kg.The average recovery values were in the range of 82.8%-108.9%,with RSDs(n=6)in the range of 1.9%-6.7%.[Conclusions]The method is simple,sensitive,reproducible,accurate,and can be used for simultaneous determination of the 14 kinds ofβ-receptor agonist residues in mutton.

Modernization of Chinese herbal compound and the high performance liquid chromatography tandem mass spectrometry (HPLC-MS)

Chinese herbal compound is playing an important role on curing human diseases.And it has been a trend that Chinese herbal compound is being used all over the world in 21 century.However,our Chinese herbal compound is facing serious challenge for the lack of canonical system of quality criterion for Chinese herbal compound so it has been a urgent problem to set up the quality control standards and reveal therapeutic basis of Chinese herbal compound.In order to give full play to the advantages of Chinese herbal compound,modern scientific and technological is used to research of Chinese herbal compound,especially the high performance liquid chromatography tandem mass spectrometry(HPLC-MS),because it is high sensitive,rapid,and obtain more information.It is very necessary that HPLC-MS is uesed to elucidate the effective components of basic substances of Chinese Herbal Compound,and endow traditional Chinese medicine with modern scientific connotation.

Detection of 36 antibiotics in coastal waters using high performance liquid chromatography-tandem mass spectrometry

Among pharmaceuticals and personal care products released into the aquatic environment, antibiotics are of particular concern, because of their ubiquity and health effects. Although scientists have recently paid more attention to the threat of antibiotics to coastal ecosystems, researchers have often focused on relatively few antibiotics, because of the absence of suitable analytical methods. We have therefore developed a method for the rapid detection of 36 antibiotic residues in coastal waters, including tetracyclines (TCs), sulfanilamides (SAs), and quinolones (QLs). The method consists of solid-phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis, using electrospray ionization (ESI) in positive mode. The SPE was performed with Oasis HLB and Oasis MCX cartridges. Chromatographic separation on a C18 column was achieved using a binary eluent containing methanol and water with 0.1% formic acid. Typical recoveries of the analytes ranged from 67.4% to 109.3% at a fortification level of 100 ng/L. The precision of the method, calculated as relative standard deviation (RSD), was below 14.6% for all the compounds. The limits of detection (LODs) varied from 0.45 pg to 7.97 pg. The method was applied to determine the target analytes in coastal waters of the Yellow Sea in Liaoning, China. Among the tested antibiotics, 31 were found in coastal waters, with their concentrations between the LOD and 212.5 ng/L. These data indicate that this method is valid for analysis of antibiotics in coastal waters. The study first reports such a large number of antibiotics along the Yellow Sea coast of Liaoning, and should facilitate future comprehensive evaluation of antibiotics in coastal ecosystems.

Bio-analytical method development and validation of Rasagiline by high performance liquid chromatography tandem mass spectrometry detection and its application to pharmacokinetic study

The most suitable bio-analytical method based on liquid liquid extraction has been developed and validated for quantification of Rasagiline in human plasma. Rasagiline-13C3 mesylate was used as an internal standard for Rasagiline. Zorbax Eclipse Plus C18 （2.1 mm × 50 mm, 3.5 um） column provided chromatographic separation of analyte followed by detection with mass spectrometry. The method involved simple isocratic chromatographic condition and mass spectrometric detection in the positive ionization mode using an API-4000 system. The lotal run time was 3.0 min. The proposed method has been validated with the linear range of 5 12000 pg/mL for Rasagiline. The intra-run and inter-run precision values were within 1.3% 2.9% and 1.6% 2.2% respectively for Rasagiline. The overall recovery for Rasagiline and Rasagiline-13C3 mesylate analog was 96.9% and 96.7% respectively. This validated method was successfully applied to the bioequivalence and pharmacokinetic study of human volunteers under fasting condition.

Analysis of ganciclovir and its related substances using high performance liquid chromatography and liquid chromatography-mass spectrometry methods

Objective High performance liquid chromatography(HPLC)and liquid chromatography-mass spectrometry(LC/MS)methods were developed for the determination of ganciclovir and its related substances.Methods A Hypersil ODS2 column(4.6 mm×250 mm,5 μm)was used with a mobile phase of 0.02 M potassium dihydrogen phosphate buffer(pH 6.0)-methanol(92∶8)at a flow rate of 1.0 mL/min,and UV detector set at 254 nm was used for monitoring the eluents.Results The method was simple,rapid,selective and capable of separating all related substances at trace level with a detection limit of 0.04 μg/mL.It has been validated with respect to accuracy,precision,linearity,and limits of detection and quantification.The linearity range was 10.2-153.0 μg/mL with r=0.9998.The percentage recoveries ranged from 96.7% to 101.6%,and RSD was 1.24%-1.96%(n=5).Conclusion The method was found to be suitable not only for monitoring the reactions during the process development but also for quality control of ganciclovir.For identification of related substances,LC/MS was used.The mainly related substances of ganciclovir active pharmaceutical ingredients(API)were determined as guanine,(1,3-dioxolan-4-yl)methyl acetate,and diacetyl guanine.

Metabolomic Studies Using High Performance Liquid Chromatography and Tandem Mass Spectrometry to Discover Quality Markers for Oriental Beauty (Dongfang Meiren) Tea

In this study, a high-performance liquid chromatograph and an electrospray ionization (ESI) triple quadrupole mass spectrometry (TQ MS) detector were used to scan Oriental Beauty tea of different grades and prices. Principle component analysis (PCA) of the profiling data was performed for pattern recognition, clearly showing that the proposed MS profiling method was able to classify Oriental Beauty tea into different grades. The component mass ions primarily responsible for the separation were selected with high loading strength in the PCA for subsequent identification with tandem mass (MS/MS). Caffeine, citrate and salicylate were verified, whereas certain other compounds remained ambiguous. Regression analysis considering caffeine, citrate and salicylate showed a linear relationship between the prices of the Oriental Beauty tea with an adjusted R2 of 0.84. If all the selected marker ions (in addition to caffeine, citrate and salicylate) could have been identified and incorporated into regression analysis, a stronger relationship could have been confirmed. These results suggest that metabolomics can facilitate the determination of real markers in the quality control of Oriental Beauty tea, and may lead to the further application of metabolomics in other food quality controls.

Simultaneous Determination of Ultraviolet Absorbers and Antibacterial Agents in Textiles by Ultra-High Performance Liquid Chromatography/Orbitrap High Resolution Mass Spectrometry

This paper reported a new analytical method for the simultaneous determination of seven benzotriazole ultraviolet absorbers and seven antibacterial agents in textiles. After ultrasonic extraction for the textile samples in methanol, the solutions were analyzed by ultra-high performance liquid chromotagraphy/orbitrap high resolution mass spectrometry (UPLC/Orbitrap HRMS). It showed that a good chromatographic separation for these target compounds was achieved by a Hypersil GOLD column (100 mm × 2.1 mm × 1.9 μm) with a gradient elution of methanol and 0.1% aqueous formic acid solution (containing 0.5 mmol/L ammonium acetate). Triclosan and 4-chloro-3,5-dimethyl phenol (PCMX) were detected by the orbitrap HRMS in an electrospray ionization (ESI) negative mode while the other twelve target compounds were detected by orbitrap HRMS in ESI positive mode. Full scan experiment was performed over the range from m/z 100 to m/z 500. These target compounds were routinely detected with mass accuracy below 2 × 10-6 (2 ppm) at the optimized conditions. The results showed that the limits of detection (LODs) were in the range from 0.1 to 0.3 μg/kg. The blank samples were spiked at three levels and their average recoveries varied from 80.5% to 96.3% while the relative standard deviation (RSD) changed from 3.2% to 9.9%. The present method was also applied for the determination of those ultraviolet absorbers and antibacterial agents in the commercial textiles.

Chemical Components of Achyranthes bidentata Leaves by Ultra High Performance Liquid Chromatography-Mass Spectrometry

[Objectives] To study the chemical components and relative content of Achyranthes bidentata leaves and provide a scientific basis for further development and utilization of A. bidentata leaves.[Methods] The chemical components of A. bidentata leaves were rapidly analyzed using the ultra high performance liquid chromatography-time of flight-high resolution mass spectrometry (UHPLC-TOF-MS).[Results] Thirty eight chemical compounds were identified in samples of A. bidentata leaves collected from Wen County of Henan Province, in which seven chemical compounds had the relative content higher than 5%, linoleic acid reached 25.7% and inokosterone A reached 13.8%.[Conclusions] A. bidentata leaves contain many kinds of chemical compounds. This study is expected to provide a certain basis for further extraction of linoleic acid and inokosterone A.

Determination of okadaic acid related toxins from shellfish (<i>sinonovacula constricta</i>) by high performance liquid chromatography tandem mass spectrometry

Consumption of shellfish contaminated with algal toxins produced by marine dinoflagellates can lead to diarrhetic shellfish poisoning (DSP). It was therefore essential that there are analytical techniques to identify and quantify DSP toxins in shellfish. This new methodology could facilitate DSP monitoring and create a means of rapidly responding to incidents threatening public health. In the last years there were different analytical methods for DSP, such as mouse bioassay and LC-FLD. With the development of instrument, Liquid chromatography-mass spectrometry was substituted for other analytical methods with its good sensitivity and selectivity and without derivatization for the determination of DSP. In this report, a high performance liquid chromatogra-phytandem mass spectrometric(HPLC-MS/MS)method was developed for the simultaneous determination of okadaic acid (OA) and dinophysistoxins(DTX1) in Sinonovacula constricta. Optimization of pretreatment experiment was carried out to maximize recoveries and the effectiveness. The analytes were determined under multi-reactions monitoring (MRM) scan type with tandem mass analyzer using negative ion electrospray ionization (-ESI) mode .Finally, the detection and identification of OA and DTX-1 were based upon their retention times (RT) and the fragmentation patterns of their mass spectra. The method of LOQ for the two poisons was 0.02 mg·kg-1.The real sample test showed that this method could be used for sensitive, fast, and accurate determination of the two diarrheic shellfish poisons in shellfish.

Determination of thyreostats in bovine urine using ultra-high performance liquid chromatography-tandem mass spectrometry

Five thyreostats(TSs),namely tapazole,thiouracil,methylthiouracil,propylthiouracil,and phenylthiouracil,were determined in bovine urine using ultra-high performance liquid chromatography-tandem mass spectrometry(UHPLC-MS/MS)in positive electrospray ionization mode.Extraction and clean-up were achieved using a ChemElut cartridge with tert-butyl methyl ether,without a derivatization step.Separation was achieved on an Acquity UPLC SS T3 column.The mobile phase was acetonitrile and water containing 0.2%(v/v)formic acid.The mass spectrometer was operated in multiple reaction monitoring mode.Urine samples were spiked with TS solution at levels corresponding to 5,10,15,and 20μg/L.The accuracy(internal standard corrected)ranged from 92%to 107%,with a repeatability precision(relative standard deviation,RSD)less than 15%for all five analytes.The RSDs within-laboratory reproducibility was less than 26%.The decision limits(CCα)and detection capabilities(CCβ)were obtained from a calibration curve and were in the ranges of 3.1-6.1μg/L and 4.0-7.4μg/L,respectively.The CCαand CCβvalues were below the recommended concentration,which was set at 10μg/L.The results show that the described method is suitable for the direct detection of TSs in bovine urine.This method can also be used to determine TSs in porcine urine.

Determination of 24 Allergens in Perfume with High Performance Liquid Chromatography Tandem Mass Spectrometry

A method of 24 allergens determination in cosmetics were established with high performance liquid chromatography tandem mass spectrometry. The targeted compounds were extracted with acetonitrile and determined with LC-MS/MS (MRM mode) with external method. The linearity between concentrations and peak area ratio was obtained from 1.0~5.0 mg/L. The limits of detection were 1.0 mg/L for the instrument and 5.0 mg/kg for the method respectively. The LOQ was 15.0 mg/L. The average recoveries of 24 allergens were between 85.9% and 110.0% at spiked levels of 5, 10 and 20 mg/kg with relative standard derivation (RSDs) of 5.5%~12.0%(n=10). The method could be used as a reliable means for simultaneous quantitative determination of allergens in cosmetics.

基于UHPLC-MS/MS法分析补肾利咽汤物质基准的特征图谱暨多指标成分的筛选与含量测定研究

目的采用超高效液相-质谱(UHPLC-MS/MS)法同时测定补肾利咽汤(BSLYT)中化学成分,建立BSLYT物质基准的高效液相色谱指纹图谱及莫诺苷、马钱苷、木蝴蝶苷A、木蝴蝶苷B、黄芩苷、落新妇苷等6种主要成分的含量测定方法,为质量控制提供参考。方法利用质谱数据,建立指纹图谱。用外标法计算BSLYT样品中主要成分的含量,并结合化学计量学方法分析不同批次样品的差异。结果质谱共指认出了69种化合物,经过与高效液相色谱比对,共指认出13种化合物。15批BSLYT物质基准特征图谱的相似度在0.90以上,共指认了27个共有峰。聚类分析(CA)将物质基准分为2类,即S1、S2、S5、S8、S9、S13、S15为一类,S3、S4、S6、S7、S10-S12、S16为一类。通过主成分分析(PCA)和正交偏最小二乘法判别分析(OPLSDA),筛选出影响物质基准分类的化学成分,分别归属于木蝴蝶、山茱萸和土茯苓。多指标成分含量测定6个成分,分别为莫诺苷、马钱苷、木蝴蝶苷A、木蝴蝶苷B、黄芩苷、落新妇苷含量范围分别在0.31%-0.51%、0.12%-0.22%、0.09%-0.19%、0.09%-0.24%、0.07%-0.18%、0.08%-0.29%。结论本文建立的指纹图谱和多指标含量测定方法准确、稳定,为补肾利咽汤的物质基准及相关制剂的质量控制提供依据。

HPLC-MS/MS测定保健食品中6种大麻素

目的:利用高效液相色谱-串联三重四极杆质谱(HPLC-MS/MS)对保健食品中6种大麻素进行定性定量分析。方法:HLB固相萃取小柱净化,采用XBridge C18色谱柱,乙腈溶液作为有机相,10mmol·L^(-1)乙酸铵水溶液作为水相,2种离子模式同时扫描,同位素内标定量。结果:所测大麻素在1-100μg·L^(-1)浓度范围均呈现良好线性关系,相关系数(r^(2))均>0.999。方法的检出限和定量限分别为5μg·kg^(-1)和10μg·kg^(-1)。该方法稳定性好,灵敏度高,适用于常见保健食品中6种大麻素的定性定量分析。结论:本研究成功建立了保健食品中6种大麻素的定性定量分析,为保健食品品质评价、安全监管及风险防范提供技术支持。

高效液相色谱-质谱法(HPLC-MS)测定化妆品中达克罗宁的含量

建立了一种高效液相色谱-质谱法(HPLC-MS)测定化妆品中达克罗宁含量的方法。样品经乙腈提取15 min后,用体积分数20%乙腈溶液稀释,经Capcell PAK C_(18)色谱柱(100 mm×2.1 mm×2μm)分离后,多反应监测模式进行检测。结果表明:达克罗宁在1.0~25.0 ng/mL线性关系良好,相关系数(r)大于0.995;加标回收率在89.4%~104.5%。该方法高效、准确,可用于化妆品中达克罗宁的定性和定量检测。

HPLC-MS/MS直接进样法测定环境水体中阿特拉津和甲萘威

采用HPLC-MS/MS直接进样方式,建立了一种适用于生活饮用水及其水源水等环境水体中甲萘威和阿特拉津的快速测定方法。本方法与现行环境保护标准相比,具有灵敏度高、操作简便、出峰时间快等优势。实验结果表明:甲萘威和阿特拉津的检出限分别为0.07μg/L和0.08μg/L,甲萘威相关系数达0.999 7,阿特拉津相关系数达0.999 6,方法精密度在2.72%~10.32%之间,加标回收率结果在87.5%~120.5%之间。该方法线性相关系数高、方法检出限低、精密度和准确度均满足环境水体中特定项目分析要求,方法准确可靠,且只需将样品过滤及稀释后即可上机测定,免去了液液萃取或固相萃取等浓缩步骤,极大地缩短了样品预处理和分析测试时间,快速简便。

HPLC-MS/MS法测定保健品中麻黄碱、伪麻黄碱的不确定度评估

建立HPLC-MS/MS法测定保健品中麻黄碱、伪麻黄碱的测定不确定评估方法。通过构建麻黄碱、伪麻黄碱含量的数学模型,对不确定来源进行分析。分析结果表明,在麻黄碱和伪麻黄碱测定过程中不确定度主要来源是标准溶液的配制和标准曲线的拟合。当保健品中麻黄碱的含量为9.850μg/kg时,其扩展不确定度为0.7458μg/kg(k=2);伪麻黄碱含量为9.557μg/kg时,其扩展不确定度为0.9547μg/kg(k=2)。

HPLC-MS/MS测定食糖中4种合成着色剂

目的:建立高效液相色谱-串联质谱法(High Performance Liquid Chromatography-Tandem Mass Spectrometry,HPLC-MS/MS)测定食糖中4种着色剂的分析方法。方法:样品经80%甲醇超声提取,再用PWA-2固相萃取柱净化后,经VP-ODS C_(18)柱(2.0 mm×150 mm,5.0μm)分离,以乙酸铵和甲醇为流动相,梯度洗脱,用HPLC-MS/MS检测。结果:4种化合物在考察范围内线性良好,相关系数均大于0.999;加标回收率在85.36%~102.30%,RSD为0.42%~2.72%;检出限为2~5μg·kg^(-1)。结论:该方法灵敏度高、分辨率高、分析速度快,适用于食糖中合成着色剂的快速筛查和定量分析。

基于HPLC-MS/MS对海博麦布中对甲苯胺、对氟苯胺、邻氟苯胺的残留检测研究

基于HPLC-MS/MS法建立海博麦布中对甲苯胺、对氟苯胺、邻氟苯胺的检测方法。采用高效液相色谱进行分离,以Waters ACQUITY UPLC^(?)BEH C_(18)(2.1 mm×100.0 mm,1.7μm)为色谱柱,以0.1%甲酸溶液和甲醇为流动相,梯度洗脱;以三重四极杆质谱为检测器,质谱采用电喷雾离子源、正离子、多反应监测模式(MRM)采集数据。结果显示,对甲苯胺、对氟苯胺、邻氟苯胺在1.0000~20.0000 ng/L范围内线性关系良好,相关系数(r)为0.9975~0.9999;方法检出限为0.33 mg/kg,定量限为1.00 mg/kg;方法加样回收率为85%~95%。本方法建立了海博麦布中对甲苯胺、对氟苯胺、邻氟苯胺的检测方法。该方法操作简单,线性关系良好,检出限低,回收率高,可为海博麦布制备工艺中对甲苯胺、对氟苯胺、邻氟苯胺的质量控制提供技术支持。

QuEChERS-HPLC-MS/MS法测定中药中4种交链孢霉毒素

样品用1%甲酸-乙腈溶液提取,经N-丙基乙二胺(PSA)净化,采用BEH-C 18色谱柱分离,以0.1%甲酸水溶液-乙腈为流动相,采用电喷雾离子源负离子模式扫描,多反应模式(MRM)监测目标物,内标法定量。4种交链孢霉毒素在0.200~200 ng/mL的范围内呈现良好的线性关系(R 2≥0.999),并以西洋参为例做方法学验证。该方法还可应用在铁皮石斛、薏仁、陈皮、莲子和橄榄这五种基质中。该方法操作简单快捷,可用于中药中4种交链孢霉毒素的检测。

HPLC-MS/MS法测定尿液中的氟胺酮及其代谢物

本文确定了除去甲氟胺酮以外的两种氟胺酮一相代谢产物的具体结构,并建立了尿液中氟胺酮、去甲氟胺酮、顺式氟胺醇和反式氟胺醇的高效液相色谱-三重四极杆串联质谱(HPLC-QQQ MS/MS)检测方法。基于液相色谱串联高分辨质谱筛查,定向合成两种氟胺酮代谢物顺式氟胺醇和反式氟胺醇,并利用^(1)H NMR、^(13)C NMR和二维NOE谱图确定其结构;建立了尿液中氟胺酮、去甲氟胺酮、顺式氟胺醇和反式氟胺醇的HPLC-QQQ MS/MS检验方法,该方法对于氟胺酮及其三种主要代谢物在0.5~200 ng/mL浓度范围内线性关系良好,线性相关系数均大于0.9963,方法回收率介于81.60%~119.33%之间;利用所建方法对吸毒人员尿液样本中的氟胺酮及其三种代谢物的含量进行了检测。本研究所开发的方法检出限低、回收率高和重现性好,可用于定性和定量氟胺酮的稳定代谢物。