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.

Determination of Oleuropein in Cosmetics by Ultra Performance Liquid Chromatography-Triple Quadrupole Tandem Mass Spectrometry

An ultrahigh performance liquid chromatography-triple quadrupole tandem mass spectrometry(UPLC-MS/MS)was established to quickly and accurately determine the content of oleuropein in cosmetics.The samples were extracted with methanol-aqueous solution,and the mobile phase with methanol-formic acid solution(0.1 mol/L)=40∶60 was separated by Agilent ZORBAX Eclipse Plus C18(2.1 mm×50 mm×1.8μm-Micron)column temperature 30℃,flow rate 0.3 mL/min.The MS end was detected by electrospray negative mode ionization(ESI-)and multiple reaction monitoring(MRM)mode.The results show a good linear relationship in the range of 0.002~5 mg/L,with a correlation coefficient R2 of 0.999,5.Method recovery range from 84.2%~107.6%and the relative standard deviation RSD is 5.8%.The detection time is 5 min,the detection limit is 0.000,6 mg/L,and the limit of quantification is 0.002 mg/L.This method has the advantages of convenient operation,low quantification limit,high precision and good repeatability,and is suitable for measuring the content of oleuropein in many kinds of cosmetics.

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.

Simultaneous Determination of Bisphenols and Alkylphenols in Water by Solid Phase Extraction and Ultra Performance Liquid Chromatography-tandem Mass Spectrometry

To establish an analytical method for determination of four bisphenols （BPA, BPB, BPF, and BPS） and two alkylphenols （4-n-OP, 4-n-NP） in water by ultra performance liquid chromatography- tandem mass spectrometry （UPLC/MS/MS）. The water samples were extracted and condensed with solid-phase extraction （SPE） using C18 cartridges and eluted by acetonitrile. Separation was carried out with Acquity BEH C8 column and detection were performed by UPLC/MS/MS. Quantification was calculated by using the internal standard BPA-d16 and 4-n-NP-d8. The linear correlation coefficients of these compounds in the range of 1.0-100.0μg/L were all over 0.999. The minimum detectable concentrations were 0.75-1.0 ng/L, and the recoveries ranged from 87.0% to 106.9%.

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.

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.

Rapid Determination of Three Kinds of Microcystins in Environmental Water Samples by Disk SPE-Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry

A method of rapidly detecting three kinds of microcystins( MCs) in environmental water samples by using disk SPE- ultra high performance liquid chromatography- tandem mass spectrometry( UPLC- MS / MS) was established. Firstly,environmental water samples were extracted by disk SPE column( C_(18)),and three kinds of MCs were separated by Waters BEH C_(18) chromatographic column with acetonitrile- 0. 2% formic acid solution as the mobile phase. After the gradient elution separation,the external standard method was used for quantitative and qualitative analysis under MRM of UPLC- MS / MS. The results showed that the three kinds of MCs in the range of 0. 05- 10 μg / L showed good linear relation,and the correlation coefficients were higher than 0. 999 4,while the method detection limit was 0. 04 ng / L. Under 0. 1,1,and 5 μg / L standard addition for the same environmental sample,the average recovery was 82. 8%- 108. 8%,and the relative standard deviation of determination results was2. 1%- 10. 1%( n = 6). This method is rapid,sensitive and accurate,so it can be effectively applied in the monitoring of MCs in environmental water samples.

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.

UPLC-MS/MS法检测3种食品中松仁过敏原

基于食品基质中松仁过敏原Pin k 2建立了一种超高效液相色谱-串联质谱法。将松仁经过研磨、脱脂、浸提、酶解后经Easy-nLC 1000-QExactive高分辨质谱仪进行分离分析,结合Uniprot蛋白数据库以及ProteinPilotTM软件对质谱图进行数据处理,经BLAST验证特异性,最终筛选3条松仁特异性肽段。方法学验证结果表明,方法在0.001~50mg/mL范围内线性关系良好,定量限为1mg/kg;在饼干、巧克力和饮料3种空白基质中的平均回收率为88.50%~107.57%,相对标准偏差不高于6.08%,基质效应为89.77%~96.13%。该方法具有灵敏度高、特异性好的优势,可应用于饼干、巧克力、饮料等食品样品中松仁过敏原的检测,为我国食品标签真实性检验及食品中隐性过敏原的检测提供技术支持。

UPLC-MS/MS法同时测定蛋白饮料和液体调味品中36种防腐剂

采用提取和净化相结合的前处理方式,建立并优化了同时测定蛋白饮料、液体调味品中36种防腐剂的超高效液相色谱-串联质谱检测方法。样品采用饱和NaCl溶液(用磷酸调节pH=3)净化和乙腈-甲醇(9∶1,体积比)(含体积分数为0.2%的甲酸)提取。采用C18反向色谱柱进行分离,以甲醇和5 mmol/L乙酸铵为流动相梯度洗脱,采用电喷雾离子源正负离子同时扫描,动态多反应监测模式,基质匹配标准曲线,外标法定量。结果表明,36种防腐剂在1~250 ng/mL线性良好(相关系数≥0.999),方法定量限为0.04~0.2 mg/kg;空白样品不同加标水平下的平均加标回收率为75%~119%;相对标准偏差为0.90%~9.8%。建立的高通量检测方法灵敏、快速,准确度高,操作简便且能有效减少基质干扰、降低检测成本,极大提高多种防腐剂的定性定量检测效率。

高通量高效快速净化方法结合UPLC-MS/MS测定粮食中黄曲霉毒素

建立粮食中黄曲霉毒素B1、B2、G1、G2快捷高效的确证检测方法。通过对色谱及质谱分析条件、震荡提取方式、稀释倍数分别优化确定满足黄曲霉毒素B1、B2、G1、G2检测方法的最优条件,同时,开发一款自动过柱仪与快速净化柱配合使用对粮食中杂质进行高通量的高效净化,并采用超高效液相色谱-串联质谱(UPLC-MS/MS)进行检测分析。粮食样品经84%乙腈水溶液提取、Speedy Prep®-Myco1流穿式净化柱净化,使用ACQUITY UPLC BEH C18色谱柱分离,以0.1%甲酸水和乙腈作为流动相进行梯度洗脱,质谱采用电喷雾正离子模式和多反应监测模式(multiple reaction monitoring,MRM)采集信号,外标法定量。对于大米、小黄米、小麦、黄豆、面粉、大麦、黑米、花生、玉米基质,本方法黄曲霉毒素B1、B2、G1、G2的检出限和定量限分别为0.06~0.12μg/kg和0.20~0.40μg/kg,在其线性范围内相关系数R≥0.9993,在0.2、0.4、1、10、20、40μg/kg添加回收率为72.37%~118.4%,相对标准偏差(RSD,n=6)为0.64%~14%,回收率和精密度良好。该方法前处理操作简单、稳定性好,适用于粮食中黄曲霉毒素B1、B2、G1、G2的检测。

QuEChERS-UPLC-MS/MS同时测定畜禽肉中23种驱虫类药物残留量

研究旨在建立同时检测畜禽肉中多种驱虫类药物的分析方法,通过优化前处理方法和仪器分析条件,建立了分散固相萃取法-超高效液相色谱-串联质谱法(UPLC-MS/MS)同时测定畜禽肉中23种驱虫类药物残留的分析方法,目标物以乙腈提取,分散固相萃取法(QuEChERS)净化,用乙腈+0.1%甲酸水作为流动相、UPLC-MS/MS确证检测、外标法定量。结果显示:所建立的方法定量限为0.2~1.0μg/kg,回收率为71.4%~107.5%,相对标准偏差为0.9%~8.8%。表明该方法定量限低,稳定性好,适用于畜禽肉中23种驱虫类药物残留的同时检测。

基于硅烷化三聚氰胺海绵的改良QuEChERS结合UPLC-MS/MS快速测定猪肉中49种抗生素多残留

采用十八烷基三氯硅烷(octadecyltrichlorosilane,OTS)与N-[3-(三甲氧基硅基)丙基]乙二胺(N-[3-(trimethoxysilyl)propyl]ethylenediamine,ATS)改性三聚氰胺海绵(melamine sponge,MeS)制备得到2种新型弹性多孔硅烷化MeS(OTS@MeS和ATS@MeS)净化材料,将其用于改良QuEChERS(quick,easy,cheap,effective,rugged and safe)基质净化过程,通过溶液自发浸润和物理挤压过程即可快速、高效分离干扰基质,结合超高效液相色谱-串联质谱技术建立了同时测定猪肉中49种抗生素多残留的分析方法。样品用1.0%乙酸-乙腈溶液提取并用2.0 g Na_(2)SO_(4)和0.5 g NaCl盐析,离心后取1 mL上清液复配使用OTS@MeS与ATS@MeS净化,随后使用Agilent ZORBAX Eclipse Plus C_(18)色谱柱,以甲醇溶液和含有0.1%甲酸、5 mmol/L乙酸铵的甲醇-水溶液(5∶95,V/V)为流动相进行梯度洗脱,采用电喷雾电离源、正离子多反应监测模式进行定性定量分析。结果表明:49种抗生素的相关系数均大于0.999,基质效应为-13.5%~10.9%,检出限在0.1~10μg/kg之间,定量限在0.3~30.3μg/kg之间;利用该方法在低、中、高3个加标水平下进行回收率实验,回收率范围为65.0%~112.7%,日内和日间相对标准偏差分别为0.3%~11.8%和2.4%~18.4%。该方法样品前处理过程简单、快捷、灵敏度高、准确性好,可用于猪肉中49种抗生素多残留的高效快速检测。

UPLC-MS/MS法测定黄瓜中肟菌酯及其代谢物肟菌酸残留量

采用QuEChERS技术对黄瓜样品进行萃取,经C18净化和BEH C18色谱柱分离,采用超高效液相色谱-串联质谱法(Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry,UPLC-MS/MS),测定黄瓜中肟菌酯及其代谢物肟菌酸残留量。结果表明,在1.0~50.0μg·L^(-1),肟菌酯及其代谢物肟菌酸的质量浓度与信号响应的峰面积具有良好的线性关系,相关系数R^(2)≥0.9997;肟菌酯及其代谢物肟菌酸的检出限为0.05~0.08μg·kg^(-1),定量限为0.2~0.3μg·kg^(-1);加标回收率为87.3%~101.7%,相对标准偏差为1.1%~3.2%。

UPLC-MS/MS法测定动源性食品中氯霉素残留量的方法优化研究

建立一种改良的超高效液质联用法测定动源性食品中氯霉素残留量的检测方法。样品经乙腈溶液提取,利用优化后的前处理法进行净化,经电喷雾离子源,内标法定量分析,并与国标GB 31658.2—2021进行对比分析。氯霉素在0.5~20.0μg·L^(-1)线性关系良好,相关系数R^(2)>0.999,方法的检出限为0.1μg·kg^(-1)。在3个不同加标浓度水平0.2μg·kg^(-1)、0.4μg·kg^(-1)、2.0μg·kg^(-1)的样品中回收率均在90%~110%,相对标准偏差<3%,且阳性样品7次重复性测量的相对标准偏差<3%。该方法前处理简单、结果准确,各项参数都符合相关方法验证的要求,适用于日常对动源性食品中氯霉素残留量的检测。

UPLC-MS/MS法测定特殊医学用途配方食品中6种季铵盐类消毒剂残留

基于超高效液相色谱-串联三重四极杆质谱法建立含乳成分的特殊医学用途配方食品中6种季铵盐类消毒剂残留的检测分析方法。使用80%乙腈水溶液作为提取溶液对样品进行提取,采用RRHD Eclipse Plus C_(18)色谱柱进行分离,选择电喷雾离子源,在正离子模式下(ESI+)采用多反应监测模式进行检测,用基质匹配工作曲线进行定量。结果表明:6种季铵盐类消毒剂在0.1~5.0 ng/mL质量浓度范围内具有良好的线性关系,线性相关系数>0.9960,检出限为0.5μg/kg,定量限为1μg/kg;固体基质中加标回收率为72.8%~102.3%,相对标准偏差(relative standarddeviation,RSD)为0.25%~3.88%;液体基质中加标回收率为71.8%~100.8%,RSD为0.19%~2.51%。方法简单、高效、快捷、灵敏,能够很好地用于特殊医学用途配方食品中季铵盐类消毒剂的分析测定。

基于UPLC-MS/MS和GC-IMS技术分析采前套袋与未套袋油㮈果实品质差异

采用超高效液相色谱-串联质谱(ultra-high performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)和气相-离子迁移谱(gas chromatography-ion mobility spectrometry,GC-IMS)技术结合多元统计分析方法,分析采前套袋对油㮈果实代谢产物、代谢途径以及挥发性成分的影响。结果表明,采前套袋后油㮈果皮和果肉着黄色。基于UPLC-MS/MS技术鉴定到604个油㮈果实代谢物,采前套袋改变果实代谢特征和代谢途径,筛选出显著差异代谢物58个,上调物质22个,下调物质36个;其中,与滋味相关的糖类和有机酸等物质含量差异不显著,而与滋味相关的氨基酸部分差异显著。基于GC-IMS技术鉴定到油㮈果实含有醛类14种、酯类5种、醇类4种、酮类3种和其他1种共27个挥发性物质,多数酯类物质在未套袋果实中含量较高,多数醇类物质在套袋果实中含量较高。采前套袋与未套袋油㮈果实挥发性成分具有不同的指纹图谱。基于中药数据库和已鉴定代谢物查询到199个活性成分,根据筛选标准得到37个关键活性成分,其中,采前套袋果实的槲皮素含量下调。由此说明,采前套袋可提高油㮈果实外观品质,对果实滋味、香气和功效成分等部分有影响。

分散固相萃取结合UPLC-MS/MS测定不同人参加工品中46种皂苷类化合物

运用基质分散固相萃取净化,建立一种同时测定人参不同加工品中46种皂苷类化合物的超高效液相色谱-质谱分析方法。样品经体积分数80%甲醇溶液超声提取,通过N-丙基乙二胺(primary secondary amine,PSA)分散固相萃取净化后,采用KINETEX XB-C18色谱柱(2.1 mm×100 mm,2.6μm)分离,以0.1%甲酸溶液(A)和乙腈(B)为流动相进行梯度洗脱,采用负离子多反应监测模式分析和外标法定量。结果表明,46种皂苷类化合物在35 min内完成检测,在0.02~50μg/mL质量浓度范围内有较好的线性关系,所对应的相关系数(R2)均大于0.99,方法检出限为0.4~3.2 mg/kg,定量限为1.4~10.5 mg/kg,在低、中、高3个添加水平下的平均回收率为80.5%~111.6%,相对标准偏差(relative standard deviations,RSD)为1.3%~6.8%。方法日内和日间精密度的RSD分别为0.5%~4.5%(n=6)和1.1%~6.6%(n=6),重复性的RSD在1.5%~7.3%(n=6)之间,24 h内样品稳定性的RSD在0.9%~5.8%(n=6)之间。方法优化了分散固相萃取剂的种类和用量,并考察分散固相萃取净化前后对基质效应的影响,结果表明,样品前处理通过PSA分散固相萃取净化,有效降低了基质效应,且操作简便、高效、节约成本。将该方法用于3种不同人参加工产品生晒参、红参和黑参样品中46种皂苷类化合物的分析测定,结果发现红参和黑参经过蒸制加工处理后,部分原有的皂苷发生了转化,产生了稀有皂苷,且黑参中产生的稀有皂苷含量远高于红参。该方法准确可靠、快速、易操作,杂质干扰小,适合批量人参加工品中46种皂苷类化合物的同时定量分析。

利用UPLC-MS/MS快速测定大米中8种农药残留

基于超高效液相色谱-串联质谱法(UPLC-MS/MS)原理,建立对大米中8种农药残留的快速检测方法。该方法具体工艺流程为:大米样品加水润湿,乙腈和QuEChERS萃取盐包提取稀释,PSA/C18净化管净化分离,再通过电子喷雾正离子(ESI)源,DMRM正离子扫描模式进行检测。结果表明,大米中的8种农药残留在0.1~20 ng/mL范围内线性关系良好,相关系数在0.9994及以上,加标回收率为89.5%~115.8%,相对标准偏差为1.2%~6.9%;7种农药的定量限为1μg/kg,1种农药定量限为2μg/kg,同时,这8种农药的检出限均不超过0.4μg/kg。该检测方法简单、便捷、成本低,准确度和精密度良好,符合GB 2763—2021中的相关标准要求,可以用于日常大米农药残留检测。

MAX固相萃取-UPLC-MS/MS法测定肉类及其制品中L-谷氨酸钠含量的方法

目的:建立MAX固相萃取-超高效液相色谱/串联质谱法检测肉类及其制品中L-谷氨酸钠含量的方法。方法:样品经盐酸水溶液萃取,上清液经活化MAX柱净化提取,2%甲酸(v/v)的甲醇洗脱液氮吹、盐酸水溶液复溶,初始流动相稀释100倍,经0.22μm滤膜过滤后,经超高效液相色谱/串联质谱的ESI正离子模式和MRM模式检测。结果:谷氨酸钠在0.01~1.00 mg·L^(-1)分离效果好,相关系数为0.997 7,检出限为15 mg·kg^(-1),定量限为50 mg·kg^(-1),平均加标回收率为89.04%,相对标准偏差为2.28%。结论:该方法操作简便、快捷、灵敏,具有较好的准确度和精密度,可满足肉类及其制品中谷氨酸钠含量的测定。