Determination of Benzo[a]pyrene in Edible Oil by High Performance Liquid Chromatography-Fluorescence Detector (HPLC-FL)

In this study, an optimized high performance liquid chromatography-fluorescence detector (HPLC-FL) method for the determination of benzo[a]pyrene in edible oil was established. HPLC was performed with Thermo Fisher Scientific C18 column (250 mm×4.6 mm, 5 μm) as the chromatographic column and acetonitrile and water as the mobile phase, and the excitation wavelength and emission wavelength of fluorescence detector were 286 and 430 nm, respectively. The response was high, and the linear range was 0.5-10.0 ng/ml. The lowest limit of detection was 0.11 ng/ml, and the average recovery was 92.5%. This method is suitable for quantitative analysis of benzo[a]pyrene content in edible oil.

基于HPLC法及UPLC-MS法测定芫花饮片炮制前后7种成分的含量变化

目的:建立HPLC法及UPLC-MS法测定芫花中银椴苷、木犀草素、芹菜素、绿原酸、羟基芫花素、芫花素及芫花酯甲7种化学成分含量的方法,分析芫花炮制前后化学成分的变化。方法:采用HPLC法,测定银椴苷、木犀草素、芹菜素、绿原酸、羟基芫花素和芫花素6种成分的含量,色谱柱为Agilent Eclipse Plus C18(250 mm×4.6 mm,5μm),流动相为乙腈(A)-0.1%甲酸(B)梯度洗脱,流速为1.0 mL·min^(-1),进样量10μL。同时采用UPLC-MS方法测定芫花酯甲的含量,色谱柱为ACQUITY UPLC HSS T3 C18色谱柱(2.1 mm×100 mm,1.8μm),流动相为乙腈(A)-0.1%甲酸(B)梯度洗脱,流速0.3 mL·min-1,柱温35℃,进样量1μL。结果:7种成分的含量由高到低依次为芫花素>绿原酸>银椴苷>芹菜素>羟基芫花素>木犀草素>芫花酯甲。芫花炮制后7种成分的含量均发生一定程度的变化,其中绿原酸成分在炮制后含量有升高有降低,变化不明显;对于银椴苷和芹菜素成分,炮制后含量降低;对于木犀草素、羟基芫花素和芫花素3个成分,炮制后含量升高;对于芫花酯甲成分,炮制后含量降低。结论:该方法简便、灵敏、高效,为考察芫花饮片炮制前后的质量变化提供了技术支持。

自动QuEChERS结合UPLC-MS/MS测定莲雾中苯并咪唑类农药残留

为了建立自动QuEChERS结合高效液相色谱-串联质谱法测定莲雾中多菌灵、噻菌灵、苯菌灵及甲基硫菌灵4种苯并咪唑类农药残留量的检测方法。将莲雾样品采用混合试剂(5.5 g硫酸镁+1.5 g氯化钠+1.0 g柠檬酸钠+0.5 g柠檬酸二钠)进行净化,经QuEChERS自动样品制备系统进行制备后,应用超高效液相色谱-三重四级杆串联质谱法进行分析。结果表明,4种农药在1.00~10.00 ng/mL质量浓度范围内线性关系良好,决定系数(R2)均大于0.99;0.1、1.0、5.0 mg/kg 3个添加水平下,在莲雾基质中添加回收率为84%~105%,相对标准偏差为0.8%~9.5%(n=3),方法检出限和定量限分别为0.1~0.5μg/kg和0.5~10.0μg/kg。综上,该方法简便省时,净化效果好,灵敏度及准确度高,可用于同时测定莲雾中多菌灵、噻菌灵、苯菌灵及甲基硫菌灵4种苯并咪唑类农药的残留量。

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-FLD法测定全血中原卟啉和锌原卟啉

目的建立全血中原卟啉和锌原卟啉的超高效液相色谱-荧光测定方法。方法全血加入间卟啉Ⅸ-二盐酸盐内标,经纯水稀释后,采用二甲基亚砜-丙酮液液萃取进行净化,经C_(18)色谱柱分离,双通道荧光检测器检测,内标法定量。结果原卟啉和锌原卟啉的线性范围均为0.1~5.0μmol/L,相关系数均为0.9995;方法的检出限分别为0.02μmol/L和0.03μmol/L,定量限分别为0.06μmol/L和0.09μmol/L;原卟啉和锌原卟啉在低、中、高三个浓度加标时,方法的加标回收率分别为85.2%~94.7%和84.8%~92.8%;批内精密度(RSD)分别为2.8%~5.3%和2.7%~6.1%,批间精密度(RSD)分别为3.4%~6.3%和3.2%~7.1%;对30份血样中原卟啉与锌原卟啉检测结果分别为:0.1~0.5μmol/L与0.4~1.2μmol/L。结论本方法适用于全血中的原卟啉和锌原卟啉的同时测定。

UPLC-MS/MS联合m-PFC测定罗汉果中60种农药残留量

目的:建立罗汉果中60种农药残留的定量筛查方法。方法:样品经乙腈高速匀浆提取、多壁碳纳米管固相萃取小柱净化,采用超高效液相色谱-质谱法,以正、负离子同时扫描的动态多反应监测模式采集数据,采用空白基质匹配法进行定量计算。结果:60种农药线性关系良好,r均大于0.996。其中,59种农药单体的平均回收率为63.9%~108.3%,RSD均小于15%。55批样品中共检出2种禁用农药和12种常用农药。结论:该方法灵敏度高、准确性好,适用于罗汉果中多种农药残留的筛查。

Efficient and selective extraction of uranium from seawater based on a novel pulsed liquid chromatography radionuclide separation method

The novel pulsed liquid chromatography radionuclide separation method presented here provides a new and promising strategy for the extraction of uranium from seawater.In this study,a new chromatographic separation method was proposed,and a pulsed nuclide automated separation device was developed,alongside a new chromatographic column.The length of this chromatographic column was 10 m,with an internal warp of 3 mm and a packing size of 1 mm,while the total separation units of the column reached 12,250.The most favorable conditions for the separation of nuclides were then obtained through optimizing the separation conditions of the device:Sample pH in the column=2,sample injection flow rate=5.698 mL/min,chromatographic column heating temperature=60℃.Separation experiments were also carried out for uranium,europium,and sodium ions in mixed solutions;uranium and sodium ions in water samples from the Ganjiang River;and uranium,sodium,and magnesium ions from seawater samples.The separation factors between the different nuclei were then calculated based on the experimental data,and a formula for the separation level was derived.The experimental results showed that the separation factor in the mixed solution of uranium and europium(1:1)was 1.088,while achieving the initial separation of uranium and europium theoretically required a 47-stage separation.Considering the separation factor of 1.50for the uranium and sodium ions in water samples from the Ganjiang River,achieving the initial separation of uranium and sodium ions would have theoretically required at least a 21-stage separation.Furthermore,for the seawater sample separation experiments,the separation factor of uranium and sodium ions was 1.2885;therefore,more than 28 stages of sample separation would be required to achieve uranium extraction from seawater.The novel pulsed liquid chromatography method proposed in this study was innovative in terms of uranium separation and enrichment,while expanding the possibilities of extracting uranium from seawater through chromatography.

SPE-UPLC联用快速检测保健品中人参皂苷Rh2成分

目的:基于固相萃取与超高液相色谱联用技术,建立一种快速准确检测保健品中人参皂苷Rh2成分的方法,为市售含有人参皂苷Rh2成分的保健品的质量评价提供参考。方法:样品预处理后经甲醇超声提取,中性氧化铝SPE小柱净化,筛选合适的洗脱剂进行HLB-SPE小柱分离纯化,采用WatersT3(100 mm×2.1 mm,1.8μm)色谱柱,乙腈-水为流动相梯度洗脱,PDA全波长扫描,流速0.3 mL·min^(-1)。结果:SPE-UPLC法测得人参皂苷Rh2浓度在9.7~99.8μg·mL^(-1)与其峰面积线性关系良好(r=0.999),平均回收率为99.20%。结论:该方法准确、简便、快速,并能有效去除辅料干扰,稳定性高,可用于含有人参皂苷Rh2有效成分的保健食品的质量控制。

基于UPLC-Q-TOF-MS技术建立银花抗病毒口服液的指纹图谱及多指标含量测定

目的建立银花抗病毒口服液的UPLC-Q-TOF-MS指纹图谱,对其主要化学成分进行分析鉴定,并测定6个化学成分的含量。方法采用UPLC-Q-TOF-MS技术,正、负离子模式,Agilent ZORBAX Eclipse Plus C18(3.0 mm×100 mm,1.8μm)色谱柱,以水相(A,含0.1%甲酸)和有机相乙腈(B)为流动相梯度洗脱,流速为0.4 mL·min^(-1),进样量为1μL。建立12批银花抗病毒口服液的指纹图谱,确定共有峰并进行相似度评价、聚类分析、主成分分析和偏最小二乘判别分析,通过一级、二级质谱及对照品比对鉴别共有峰的化学成分。结果在正、负离子模式下共鉴定了12批银花抗病毒口服液的指纹图谱,确定共有峰32个,指纹图谱相似度均≥0.978,通过聚类分析将样品各分为4类、3类,与主成分分析一致,筛选出汉黄芩苷、千层纸素A苷、连翘酯苷I、异绿原酸B等8个成分是导致不同批次样品差异的标志性化合物。结论所建立的指纹图谱结合多指标含量测定方法稳定、重复性好、特征性强,可为银花抗病毒口服液的质量评价和临床应用提供有效参考。

A High-Performance Liquid Chromatography Method for the Simultaneous Determination of Five Index Components in Danhong Injection

The purpose of this study was to establish a high-performance liquid chromatography (HPLC) method for the simultaneous determination of sodium danshensu, protocatechuic aldehyde, rosmarinic acid, salvianolic acid B, and 4-coumaric acid in Danhong injection. The chromatographic method employed was as follows: the column was a Welch Ultimate XB-C18 column (250 mm × 4.6 mm, 10 μm), the mobile phase was a gradient elution of 0.4% formic acid aqueous solution (A) and acetonitrile (B), the detection wavelengths were 280 nm for sodium danshensu, protocatechuic aldehyde, and salvianolic acid B and 326 nm for 4-coumaric acid and rosmarinic acid, the sample volume was 10 μL, the flow rate was 1.0 mL/min, and the column temperature was 35°C. This method can realize the separation and determination of sodium danshensu, protocatechuic aldehyde, rosmarinic acid, salvianolic acid B, and 4-coumaric acid within 50 minutes. The linear relationships of the five peak areas and their concentrations are good (R2> 0.9997). The precision RSD values are all less than 1.0%. The reproducibility RSD values are all less than 1.3%. The stability RSD values are all less than 2.2%. The recovery values ranged from 92.4% to 99.4%. This method is simple, accurate, and reproducible. It can be used for the determination of sodium danshensu, protocatechuic aldehyde, rosmarinic acid, salvianolic acid B, and 4-coumaric acid in Danhong injection.

Determination of Voriconazole in Human Plasma by Liquid Chromatography Tandem Mass Spectrometry: Application in Therapeutic Drug Monitoring

A sensitive, accurate and robust Liquid Chromatography Tandem Mass Spectrometry method has been developed and validated to measure voriconazole trough levels in human plasma. The plasma samples were mixed with fluconazole as an Internal Standard and directed to protein precipitation and drug extraction. An aliquot of 1 μl was injected into the chromatographic system and separated by the Acquity BEH C18 column at a flow rate of 0.30 ml/min in a gradient mobile phase consisting of acetonitrile, Ultrapure water (UPW), methanol and formic acid. Voriconazole was detected by a Triple Quadrupole Detector (TQD) operating on Multiple Reaction Monitoring (MRM) and a positive ion mode Electrospray ionization (ESI) Q1 mass: 350.1 m/z, Q3 mass: 281.1 m/z. Method linearity of the calibration curve (0.10 - 8.00 μg/ml) indicated a correlation coefficient r ≥ 0.99. The intra and inter-assay accuracy was within 85% - 115% and the intra and inter-assay precision was ≤5.76%. Voriconazole recovery percentage was between 97.69 - 119.62%. The method was successively applied in routine voriconazole TDM.

UPLC-Q-Exactive-Orbitrap-MS法同时测定牛黄上清片中18种胆汁酸的含量

目的 建立超高效液相色谱-四极杆-静电场轨道阱高分辨质谱(UPLC-Q-Exactive-Orbitrap-MS)法同时测定牛黄上清片中牛磺胆酸、7-酮-3α,12-α-羟基胆烷酸、甘氨猪去氧胆酸、12-脱氢胆酸、甘氨胆酸、3-酮-7α,12α-二羟基-5β-胆烷酸、牛磺鹅去氧胆酸、3α-羟基-7-氧代-5β-胆烷酸、猪胆酸、牛磺脱氧胆酸钠、猪去氧胆酸、胆酸、甘氨鹅脱氧胆酸、甘氨脱氧胆酸、牛磺石胆酸钠、鹅去氧胆酸、去氧胆酸、石胆酸的含量。方法 分析采用Thermo Fisher Scientfic Bremen HYPERSIL GOLD色谱柱(2.1 mm×100 mm, 1.9μm);流动相0.1%甲酸-甲醇,梯度洗脱;体积流量0.2 mL/min;柱温40℃;加热电喷雾离子源;负离子扫描;平行反应监测模式。再进行化学模式识别。结果 18种胆汁酸在各自范围内线性关系良好(r≥0.999 5),平均加样回收率96.73%~104.07%,RSD 2.10%~4.07%。不同厂家样品中各胆汁酸在种类和含量上存在一定差异。结论 该方法灵敏可靠,专属性好,可用于牛黄上清片的质量控制。

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UPLC-QqQ-MS/MS测定人参属中药对甲亢大鼠类固醇激素含量的影响

本研究利用超高效液相色谱-三重四极杆串联质谱(UPLC-QqQ-MS/MS)联用技术定量测定甲亢大鼠血清中肾上腺素和多种类固醇激素,探讨血清中类固醇激素含量与甲状腺功能亢进的相关性,以及不同药性人参属中药红参和人参叶对甲亢高代谢的改善作用。采用主成分分析(PCA)、Spearman检验进行肾上腺素和类固醇激素与甲状腺功能的相关性分析。结果表明,UPLC-QqQ-MS/MS能够快速检测待测物的含量和变化,灵敏度高、重现性好、准确率高且分析速度快。与空白组相比,甲亢大鼠血清中类固醇激素含量均有不同程度的降低,给予不同药性人参属中药后均出现升高。类固醇激素水平异常在一定程度上与甲状腺激素有关,皮质酮和肾上腺素可作为中药调节类固醇激素代谢的关键指标;睾酮可作为寒性中药调节类固醇激素的生物标志物;肾上腺素和雄烯二酮可作为温性中药调节类固醇激素的生物标志物。该方法能够系统、快速、准确、高效地完成大鼠血清中类固醇激素含量的测定,为类固醇激素的分析测定提供方法参考。

利用UPLC-DAD-HRMS分析低温压榨鲜青花椒油贮藏期间的色素变化

旨在为低温压榨鲜青花椒油的工业生产、贮藏和质量控制提供借鉴,利用超高效液相色谱-二极管阵列检测器-高分辨质谱(UPLC-DAD-HRMS)技术对低温压榨鲜青花椒油中色素进行测定,并研究贮藏过程中光、氧、温度对低温压榨鲜青花椒油的色素含量和色泽L^(*)、a^(*)、b^(*)的影响。结果表明:从低温压榨鲜青花椒油中鉴定出32种叶绿素和10种类胡萝卜素;叶绿素中主要含有叶绿素a、C13^(2)-羟基-叶绿素a、叶绿素b和脱镁叶绿素a;类胡萝卜素中主要含有叶黄素和β-胡萝卜素;叶绿素总量为9.44mg/kg,类胡萝卜素总量为4.95mg/kg。贮藏过程中影响低温压榨鲜青花椒油中色素降解最主要的因素是光,其次是温度,氧气几乎没有影响。另外,a^(*)可以作为衡量低温压榨鲜青花椒油色素含量及色泽控制的指标。

UPLC-MS/MS法检测血浆内源性大麻素在预测先兆流产孕妇妊娠结局中的应用

目的:研究孕妇外周血内源性大麻素水平周期变化规律,并分析基于孕早期内源性大麻素水平预测先兆流产孕妇妊娠结局的临床应用价值。方法:选择2020年5月至2022年5月在山东第一医科大学第一附属医院产检的1080例孕妇,其中880例孕早期发生先兆流产孕妇和200例正常妊娠孕妇,超高效液相色谱串联质谱(UPLC-MS/MS)法检测血中内源性大麻素水平,通过logistic回归分析先兆流产发展为难免流产的风险因素,并用ROC曲线评估孕酮、β-人绒毛膜促性腺激素(β-HCG)、花生四烯酸乙醇胺(AEA)预测先兆流产孕妇妊娠结局的性能。结果:发生难免流产的孕妇外周血AEA平均水平为(3.96±2.04)nmol/L,显著高于持续妊娠孕妇[(2.16±2.00)nmol/L](P<0.001)。年龄、AEA、孕酮、β-HCG、胎龄及阴道流血量是先兆流产发展为难免流产的风险因素(P<0.05)。孕早期内源性大麻素AEA,当阈值为2.565nmol/L时,用于预测先兆流产孕妇妊娠结局的准确率为86.7%,具有最优预测性能。结论:孕妇外周血内源性大麻素AEA水平测定是预测先兆流产患者妊娠结局的有效工具。

SPE-UPLC-MS/MS同时测定食品中24种酸性工业染料

建立了固相萃取-超高效液相色谱串联质谱法同时测定食品中24种酸性工业染料的分析方法。样品经氨水乙醇溶液(氨水:无水乙醇:水=2:7:1,v/v/v)提取,提取液氮吹浓缩至1 mL,加入10 mL 5%甲醇水溶液,弱阴离子交换固相萃取柱(Agela Cleanert PWAX)富集净化,氮吹复溶后,Agilent ZORBAX Eclipse RRHD C_(18)(3.0 mm×150 mm,1.8μm)色谱柱分离,流动相采用乙腈和10 mmol/L乙酸铵溶液进行梯度洗脱,电喷雾离子源负离子进行电离,多反应监测模式(MRM)下测定,外标法定量。结果表明,24种酸性工业染料在20~300 ng/mL范围内,相关系数r均大于0.999;方法检出限为10μg/kg,定量限为25μg/kg;在25、100、250μg/kg三个不同加标水平下的回收率为91.0%~112.7%,相对标准偏差(n=6)为0.42%~4.39%。采用该方法对市售的豆制品、调味品、水产品、肉制品各40批次进行测定,2批次卤肉样品中检出酸性橙Ⅱ,含量分别为138±2.8μg/kg和179±3.7μg/kg;2批次香肠样品中检出红2G,含量分别为320±8.6μg/kg和230±6.2μg/kg。该方法灵敏、快速、准确,适用于食品中24种酸性工业染料的定性定量测定。

固相萃取-UPLC-MS/MS法测定环境水体中多种抗生素

采用固相萃取-超高效液相色谱串联质谱法测定环境水样中25种磺胺类和喹诺酮类抗生素,通过优化试验条件,使方法在2.00μg/L~200μg/L范围内线性良好,方法检出限为1.01 ng/L~2.85 ng/L,7次测定结果的RSD为2.3%~8.0%。将该方法用于自来水和地表水测定,结果均为未检出,高、低质量浓度水平的加标回收率为61.2%~102%。

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。

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。