高效液相色谱-串联质谱法测定肉制品和调味料中7种水产品过敏原

基于高效液相色谱-串联质谱系统建立了食品中水产品过敏原的快速筛查和定量检测方法。样品经蛋白质提取、纯化、胰蛋白酶解后，利用超高效液相色谱-四极杆/静电场轨道阱高分辨质谱（UPLC-Q/Exactive-HRMS）结合ProteinPilot软件，基于母离子和碎片离子谱分析，实现蛋白质和多肽的鉴定。再通过基本局部比对搜索工具（BLAST）与Uniprot数据库对比分析，筛选出南美白虾、大闸蟹、青蟹、金枪鱼、大西洋鲑鱼的7种过敏原蛋白的30个特征肽。利用高效液相色谱-三重四极杆质谱（UPLC-QqQ-MS）系统对特征肽进行验证和多反应监测（MRM）定量研究。结果表明，该方法在5~250 mg/kg范围内线性关系良好，检出限为2~3.5 mg/kg，平均回收率为88.7%~110.2%。该方法重现性好，通量高，可应用于肉制品和调味料中7种过敏原的快速筛查和定量分析。     

高效液相色谱-串联质谱法同时测定动物源性食品中24种磺胺类药物残留

利用高效液相色谱-电喷雾串联四极杆质谱(HPLC-MS/MS)联用技术,建立了一种在28 min内快速分离和测定鸡肉、猪肉、牛肉、羊肉、蜂蜜、牛奶中24种磺胺类药物残留的方法.方法检出限(LOD)为0.27～7.45μg/kg,定量限(LOQ)0.957～9.89 μg/kg;在5～300μg/L范围内线性关系良好,在10、20、50μg/kg 3个添加浓度上回收率为60.8%～122.9%,相对标准偏差(PSD)为0.01%～19%.     

液相色谱-串联高分辨质谱法测定动物源性食品中去氢表雄酮残留量

建立超高效液相色谱-四级杆-静电场轨道阱串联质谱法测定动物源性食品(包括猪肉、牛肉、羊肉、鸡肉和鸭肉)中去氢表雄酮残留量。采用Hypersil GOLD-C₁₈色谱柱为分析柱,以0.1%(体积分数)甲酸溶液-甲醇作为流动相,梯度洗脱分离干扰物质,在电喷雾正离子模式下,用平行反应监测扫描模式采集数据,利用保留时间和相对离子丰度进行双重定性,基质匹配内标法定量。去氢表雄酮的质量浓度在2～250 ng/mL范围内线性关系良好,相关系数为0.999 9,方法检出限为2.0μg/kg,定量限为4.0μg/kg。在4.0、8.0、10.0μg/kg 3个添加水平下平均回收率为85.4%～100.3%,测定结果的相对标准偏差为1.9%～6.8%(n=5)。该法可以快速、高效测定动物源性食品中去氢表雄酮残留量,为体育赛事运动员专供动物源性食品中去氢表雄酮残留量检测提供方法和技术。     

超高效液相色谱－四极杆－飞行时间质谱技术非靶向定性筛查猪肉中79种药物残留

利用超高效液相色谱－四极杆－飞行时间质谱（UPLC－Q－TOF MS）建立了猪肉中79种药物残留的非靶向定性筛查方法。猪肉样本采用0.5%（体积分数）甲酸－乙腈溶液先提取,甲醇后提取的组合提取方式,离心后上清液通过FAVEX－NM50兽药残留快速柱净化。以Acquity UPLC BEH HSS－C18色谱柱（2.1 mm × 150 mm,1.7 μm）进行分离,UPLC－Q－TOF MS电喷雾正离子模式电离,全信息串联质谱（MSE）模式检测。79种物质在相应范围内的线性关系良好,相关系数（r2）均不小于0.99,方法的检出限和定量下限分别为0.05 ~ 10 μg/kg和0.10 ~ 20 μg/kg。基于实验室自建质谱数据库,对模拟阳性样本以及市售猪肉样本进行筛查,同时使用高灵敏度Xevo TQ－S串联四极杆质谱多反应监测模式（MRM）对市售猪肉样本进行验证。结果表明,所建立的方法高效、快速、通量高,适用于猪肉中药物残留的筛查和鉴定。     

超高效液相色谱-串联质谱法测定乳与乳制品中牛乳铁蛋白

建立了超高效液相色谱-串联质谱技术定量检测乳制品中牛乳铁蛋白含量的方法。样品经脱脂、酶解后,利用超高效液相色谱-四极杆/静电场轨道阱高分辨质谱（UPLC-Q/Exactive-HRMS）和Protein Pilot软件分析,实现了乳铁蛋白及其肽段的鉴定;通过初级局部序列搜索工具（basic local alignment search tool,BLAST）与Uniprot数据库对比分析筛选出牛乳铁蛋白的8个特征肽段;选择其中3个响应强度高、稳定性好的特征肽段进一步通过超高效液相色谱-三重四极杆质谱（UPLC-QqQ-MS）进行验证和多反应监测（MRM）定量研究,并考察了空白基质匹配的外标法和内标法对乳铁蛋白检测结果的差异。采用外标法定量时,3个肽段在各自范围内线性关系良好,检出限为0.023~0.041 mg/kg,定量限为0.077~0.137 mg/kg,平均回收率为93.8%~103.9%,日内精密度≤8.8%,日间精密度≤9.5%。该方法抗干扰能力强,灵敏度高,重复性好,适用于乳及乳制品中牛乳铁蛋白的含量测定。     

液相色谱-电喷雾串联四极杆质谱法测定鸡肉中17种磺胺类药物的残留

建立了鸡肉中17种磺胺类药物残留量的液相色谱-电喷雾串联四极杆质谱测定方法。以稳定同位素13C6-磺胺二甲基嘧啶作为内标,采用多反应监测定量。样品经过匀浆、乙腈提取、正己烷脱脂、硅胶柱净化后进行液相色谱-质谱分析。采用Capcell Pak C8DD色谱柱,以均含0.2%甲酸的水和甲醇为流动相进行梯度洗脱。方法检出限为0.02~1 μg/kg,17种磺胺类药物的加标回收率为52.3%~124.9%（添加水平为1,5,10　μg/kg),相对标准偏差为1.0%~17.6%。     

超高效液相色谱-串联质谱法鉴定驼乳及其制品中的动物源性成分

采用蛋白质组学技术建立了驼乳及其制品中的动物乳源性成分特异性肽生物标志物的鉴定方法。样品经脱脂、蛋白质提取、胰蛋白酶水解后，利用超高效液相色谱-四极杆/静电场轨道阱高分辨质谱仪(UHPLC-Q/Exactive-HRMS)和Protein Pilot软件，实现了多肽生物标记物的鉴定；然后通过基本局部比对搜索工具(BLAST)与Uniprot数据库对比分析，筛选出了骆驼、家牛、水牛、牦牛、山羊、绵羊、驴和马共8个物种的22条肽生物标志物；最后利用超高效液相色谱-三重四极杆质谱(UHPLC-QqQ-MS)系统对这22条特征性多肽进行验证，采用多反应监测(MRM)模式建立了定量方法。实验优化了骆驼奶中酪蛋白的预处理方法，如冷冻脱脂、沉淀蛋白试剂和复溶液的选择等，并建立了基于生物标志物肽测定牛和山羊奶/奶粉掺假骆驼奶/奶粉的无标记定量方法。将牛、山羊和骆驼奶/奶粉等比例混合，分别对牛和山羊的特征肽段进行检测，结果显示，该方法对掺假液体乳/固体奶粉样品显示出良好的线性关系，抗干扰能力强，灵敏度高，重复性好，液态奶和奶粉的掺杂结果均与理论值接近。另外，该方法还被应用于11种骆驼奶和奶粉中家牛、水牛...     

Captiva EMR-Lipid固相萃取/超高效液相色谱-串联质谱法快速筛查动物源食品中51种药物残留

建立了一种利用Captiva EMR-Lipid固相萃取结合超高效液相色谱-串联质谱(UPLC-MS/MS)同时分析猪肉、鸡肉、鸡蛋中51种药物残留的方法。样品经Mcllvaine-Na_2EDTA缓冲液及酸化乙腈提取,Captiva EMR-Lipid固相萃取柱净化,UPLC-MS/MS测定,采用电喷雾电离源,正离子扫描,多反应监测模式检测,内标/外标法定量。结果表明,51种药物的线性范围为0.5～10μg/L,相关系数(r)均不小于0.999 0,检出限均为2.5μg/kg,定量下限均为5.0μg/kg;猪肉、鸡肉、鸡蛋样品在5、10、20μg/kg加标浓度下的平均回收率为60%～110%,相对标准偏差(n=5)小于10%。该方法操作简便,准确度高,适用于猪肉、鸡肉、鸡蛋中多种药物残留的检测。     

QuEChERS结合HPLC-Q-TOF MS快速筛查霜膏类化妆品中297种风险物质

为有效解决霜膏类化妆品中风险物质“检不全,检不快”的问题,建立了化妆品中297种风险物质的QuEChERS结合高效液相色谱-四极杆-飞行时间质谱（HPLC-Q-TOF MS）的快速筛查方法。样品经饱和氯化钠分散,无水乙醇提取,C18分散固相萃取,采用HPLC-Q-TOF MS测定。基于超高效液相色谱-三重四极杆串联质谱（UPLC-MS/MS）,选择45种风险物质作为质控化合物对QuEChERS方法进行优化,方法检出限（LOD）为0.01～0.20 mg/kg,定量下限（LOQ）为0.04～0.40 mg/kg,3个加标水平（低、中、高）的平均回收率为81.5%～117%,相对标准偏差（RSD,n=6）为2.0%～14%。将QuEChERS方法扩展应用至297种风险物质的HPLC-Q-TOF MS靶向筛查,收集化合物的一级和二级质谱信息,建立高分辨率质谱筛查表,通过比对HPLC-Q-TOF MS采集的信息与筛查表锁定“可疑目标物”,进一步利用UPLC-MS/MS定量确证。应用此法对29个霜膏类样品进行靶向筛查,检出甲芬那酸、盐酸赛庚啶、克林霉素、林可霉素,含量为0.042～3 180 m...     

UiO-67分散固相萃取/超高效液相色谱-串联质谱法测定猪肉中6种大环内酯类兽药残留

建立了以金属有机框架材料UiO-67作为吸附剂的分散固相萃取/超高效液相色谱-串联质谱测定猪肉中6种大环内酯类兽药残留的方法。样品经pH 6.0的磷酸盐缓冲溶液提取,加入自制金属有机框架材料UiO-67吸附目标物。经甲醇洗脱后,超高效液相色谱-串联质谱多反应监测模式（MRM）定量分析：6种大环内酯类药物在0.1～200μg/L浓度范围内线性关系良好,相关系数均大于0.99;在3个不同浓度添加水平下,回收率为74.8%～102.5%,相对标准偏差（RSD）为4.3%～9.3%,检出限为0.05～0.5μg/kg,定量限为0.2～1.5μg/kg。     

Determination of tetracycline antibiotics in fatty food samples by selective pressurized liquid extraction coupled with high‐performance liquid chromatography and tandem mass spectrometry

For the determination of trace residues of tetracycline antibiotics in fatty food samples, selective pressurized liquid extraction coupled with high‐performance liquid chromatography and tandem mass spectrometry was applied in this study. Copper(II) isonicotinate was first used as online cleanup adsorbent in the selective pressurized liquid extraction process. The adsorbent to sample ratio, extraction temperature, extraction time, and recycle times, etc. were optimized. The tetracyclines in food samples of pork, chicken meat, and clam meat were detected by liquid chromatography with tandem mass spectrometry. Tetracycline was found at levels of 0.32 and 0.53 μg/g and oxytetracycline was found at 0.14 and 0.21 μg/g in chicken meat and clam meat, respectively, while chlorotetracycline and deoxytetracycline were below the detection limit. The detection limit (S/N = 3) for these four tetracyclines were from 0.2 to 3.3 ng/g, the recoveries were from 75.8 to 110.5%, and relative standard deviations were from 5.5 to 13.6%. Copper(II) isonicotinate showed a higher purification capacity than other cleanup adsorbents for extraction of antibiotics in fatty food and the recovery showed predominance compared with a pressurized liquid extraction method without adsorbent. The study demonstrated that copper(II) isonicotinate would be a promising cleanup adsorbent in pressurized liquid extraction for the analysis of trace organic pollutants in complicated samples.     

高效液相色谱-串联质谱法测定动物源性食品中矮壮素残留

建立了高效液相色谱-串联质谱测定动物源性食品中矮壮素残留的分析方法。样品经含1%（v/v）乙酸的乙腈溶液提取、正己烷脱脂、阳离子固相萃取柱（PCX）净化,采用Venusil MP C18（2）色谱柱（150 mm×2.1 mm,3 μm）分离,以乙腈和0.1%（v/v）甲酸水溶液为流动相进行梯度洗脱,采用电喷雾电离、正离子模式扫描,多反应监测模式（MRM）检测,基质匹配标准曲线内标法定量。结果表明：矮壮素在0.200~500 μg/L范围内呈良好线性,相关系数（r²）均不低于0.9993,方法的定量限为0.500 μg/kg;以猪肉、牛肉、羊肉、鸡肉、鸡蛋、猪肾、牛肝、羊肾、鸡肝、牛奶为基质,矮壮素的平均加标回收率为93.4%~101%,相对标准偏差为2.3%~8.0%。该方法基质干扰小,灵敏度高,准确可靠,适用于动物源性食品中矮壮素残留的定量检测。     

Development and Validation of a Modified QuEChERS Method for the Analysis of Bisphenols in Meats by UPLC-MS/MS

A reliable and affordable QuEChERS (quick, easy, cheap, effective, rugged, and safe) methodology in combination with ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC–MS/MS) was successfully developed and validated for the determination of eight bisphenols (BPs) residues containing in meats (chicken, duck, beef, pork, fish, shrimp, and mutton). A novel QuEChERS method optimization was carried out in terms of process efficiency (PE), matrix effect (ME), and extraction recovery (RE). After a simple vortex extraction of the samples with acetonitrile, 1 g sodium acetate was used for salting out (NaAC), and 100 mg primary secondary amine (PSA) purifying reagents were used for purification. The properties of the sorbents were assessed by the obtained parameters, such as matrix effect (ME), linearity, sensitivity, accuracy, and precision. Under the optimal conditions, BPs were well separated on an ACQUITY UPLC BEH ® C₁₈ column in 8 min by gradient elution, and exhibited a good linear relationship (R²?>?0.9988) in the linear range. Moreover, the limits of detection (LODs) and the limits of quantification (LOQs) were located in the range of 0.01– 0.11 μg/kg and 0.03 – 0.37 μg/kg, respectively. The developed method was satisfactory in terms of accuracy (relative recoveries: 76.1% – 113.7%) and precision (relative standard deviations below 10.3%). Finally, the developed method was successfully employed to identify and quantify BPs residues in 28 real meat samples. The proposed QuEChERS-UPLC–MS/MS method is simple, high efficiency, cost-effective, practical, and susceptible to being implemented in routine laboratories to quickly detect the BPs in meats (chicken, duck, beef, pork, fish, shrimp, and mutton). In this sense, the method is useful for obtaining BPs residue data to evaluate the contamination status of BPs in meat food and provide scientific support for scientific supervision.

     

Determination of butylated hydroxytoluene in food samples by high-performance liquid chromatography with ultraviolet detection and gas chromatography/mass spectrometry

A reversed-phase high-performance liquid chromatography (RP-HPLC) method was developed and compared with a gas chromatography/mass spectrometry (GC/MS) method for determining butylated hydroxytoluene (BHT) in foodstuffs as a result of migration from plastic packaging. Similar extraction procedures were used in both methods. BHT was quantitated using an external standard in the HPLC method and an internal standard in the GC/MS method. Both methods presented good linearity (r(2) > or = 0.9917) and low detection limits. Recoveries obtained with the HPLC method (chicken meat, 95.8%, and Gouda cheese, 83.9%) were better than with the GC/MS method (chicken meat, 85.6%, and Gouda cheese, 71.3%).     

分散固相萃取-高效液相色谱-串联质谱法同时测定畜禽肉中63种兽药残留

建立了分散固相萃取-高效液相色谱-串联质谱(dispersive-SPE-HPLC-MS/MS)同时测定畜禽肉中 β-内酰胺类、喹诺酮类、磺胺类、磺胺类增效剂和抗寄生虫类共5类63种兽药残留的新方法。样品经0.1 mol/L Na₂EDTA溶液及含1% (体积分数)乙酸的乙腈溶液涡旋提取,提取液经C18分散固相萃取净化后,用Poroshell EC-C18色谱柱(100 mm×2.1 mm, 2.4 μm)分离,在电喷雾离子源正离子模式下以动态多反应监测(DMRM)方式采集数据并做定性筛查和定量分析。63种药物在相应的浓度范围内线性关系良好,相关系数均大于0.99;不同畜禽肉(猪肉、牛肉及鸡肉)在3个不同添加水平下的平均回收率为62.2%~112.0%,相对标准偏差(RSD)为3.1%~16.3%,检出限(LOD, S/N≥3)和定量限(LOQ, S/N≥10)分别为0.1~3.0 μg/kg和0.5~10.0 μg/kg。该方法简便快速、灵敏可靠,适用于畜禽产品中兽药多残留的同时快速定性筛查和定量分析。     

多壁碳纳米管净化/超高效液相色谱串联质谱同时测定动物组织中四环素与喹诺酮多残留

采用超高效液相色谱-串联质谱(UPLC-MS/MS)在正离子模式下通过多反应监测(MRM)方式同时测定了猪肉和鸡肉中3种四环素和2种喹诺酮类药物的残留量.残留药物经Mcllvaine-Na2EDTA缓冲溶液(pH4.0)提取后,采用多壁碳纳米管(WMCNTs)固相萃取柱净化,甲酸-乙腈(体积比5:95)洗脱,UPLC-...     

Simultaneous detection of bacitracin and polymyxin B in livestock products using liquid chromatography with tandem mass spectrometry

With the overarching aim to develop a simple and reliable method for the quantitative analysis of polypeptide antibiotics in various livestock products, the content of bacitracin, and polymyxin B in pork, beef, chicken, milk, and eggs was analyzed using colistin sulfate as an internal standard. The extracted samples were eluted via solid‐phase extraction using 2% formic acid in acetonitrile/methanol (1:1, v/v). The two polypeptides were identified and quantified based on the intensities of mass fragments from the respective triply charged precursor ions (bacitracin: 474.97 amu and polymyxin B: 402 amu) at the defined retention time windows using liquid chromatography with electrospray ionization tandem mass spectrometry in time‐scheduled multiple reaction monitoring mode. The calibration curves showed good linearity over the concentration range 50–2500 ng/mL with determination coefficients ≥ 0.991. The mean recoveries were in the range 80.3–88.8% with relative standard deviations <13% for all samples. The limits of quantitation ranged from 30–250 ng/g. The developed method was applied to market samples, but the target analytes were not detected in any of the samples. The developed method is reliable for the simultaneous detection of bacitracin and polymyxin B in pork, beef, chicken, milk, and eggs.     

基于多肽标记物分析的肉制品掺伪定量检测技术

该文开发了一种基于多肽标记物分析的肉制品掺伪检测技术,可同时进行定性和定量分析。样品经蛋白质提取和胰蛋白酶消化后,采用高分辨质谱(HRMS)和生物信息学工具,寻找牛、鸡、鸭、猪和羊5种肉类的特异性热稳定多肽标记物。在多反应监测(MRM)模式下,通过高效液相色谱-串联四极杆质谱(HPLC-QQQ-MS)对这些标记物进一步验证。使用由两种不同质量分数的肉类混合物(0%~100%)建立定量校准曲线,测定低限可达1%。采用该方法对市售的实际样品进行测试,验证结果表明该方法是一种可靠、有效的肉制品鉴定手段,可同时用于生肉和熟肉掺伪的定量检测。     

高效液相色谱-串联质谱法测定鸡肉组织中癸氧喹酯残留

建立了测定鸡肉组织中癸氧喹酯(DEC)残留的高效液相色谱-串联质谱(HPLC-MS/MS)方法。样品经乙腈提取,正己烷脱脂,固相萃取(SPE)小柱净化;采用0.1%甲酸乙腈溶液-0.1%甲酸水溶液(78:22, v/v)为流动相,电喷雾正离子电离(ESI+)模式,多反应监测(MRM)检测模式,以内标法进行定量。结果表明: DEC在1～200 μg/L范围内呈良好的线性关系,相关系数(r2)大于0.99; 1、10、100 μg/kg 3个添加水平的回收率为78.2%～107.4%,日内、日间相对标准偏差(RSD)均小于15%,方法检出限为0.25 μg/kg,定量限为0.5 μg/kg。该方法简便、灵敏、精确,可用于鸡肉组织中DEC药物残留的确证检测。