UPLC-MSMS法快速检测食品中胭脂虫红酸含量的研究

文章建立了食品中胭脂虫红酸含量的超高效液相色谱-串联四极杆质谱（UPLC-MSMS）检测方法。样品采用盐酸溶液在沸水浴下提取,在酸性条件下用聚酰胺固相萃取小柱富集、净化,氨水/甲醇溶液洗脱后注入超高效液相色谱仪,由BEHC18柱（1.7μm,2.1×100mm）快速分离后进入串联四极杆质谱仪检测。本方法胭脂虫红酸检测限为0.1mg/kg。5种食品样品回收率为85.9%～109.2%,相对标准偏差（RSD）为1.7%～5.1%（n=6）,在0.2μg/mL～10μg/mL浓度范围内呈良好的线性关系,线性回归系数r=0.9985。     

GPC-UPLC-MS/MS法测定食用油中壬基酚和双酚A

建立食用油中壬基酚和双酚A的凝胶渗透色谱(GPC)-超高效液相色谱-质谱联用(UPLC-MS/MS)分析检测方法。食用油样品经乙酸乙酯-环己烷溶解,GPC净化后,采用超高效液相色谱-串联质谱法分析测定。仪器使用WATERS ACQUITY UPLC BEH C18色谱柱,以甲醇-0.1%氨水为流动相,梯度洗脱分离后,串联四极杆质谱多反应监测方式检测,采用内标法定量。分析结果表明,目标物检出限为1.0μg/kg,在1.0μg/kg~5.0×10~2μg/kg的范围内呈良好的线性关系(R~20.99),试验中平均添加回收率85.1%~112.5%,相对标准偏差2.57%~6.08%。     

超高效液相色谱-串联质谱法测定食品中柑橘红2号和苏丹红Ⅰ～Ⅳ染料

建立了超高效液相色谱-串联质谱法(UPLC-MS/MS)同时测定食品中柑橘红2号和苏丹红Ⅰ～Ⅳ染料的检测方法。样品采用乙腈-氯化钠体系提取,NH2固相萃取柱净化,经超高效液相色谱分离,以0.1%甲酸水溶液-乙腈为流动相进行梯度洗脱,三重四极杆质谱电喷雾电离(ESI+)检测,多反应监测模式(MRM),基质外标法定量。结果表明,柑橘红2号和苏丹红Ⅰ～Ⅳ5种成分在2～40 ng/m L范围内线性关系良好,决定系数(R~2)为0.998。低中高三个添加水平下,5种染料加标回收率在80.7%～114%之间,相对标准偏差范围8.6%。方法检出限(S/N≥3)为5.0μg/kg,定量限(S/N≥10)为10.0μg/kg。该方法简便、快捷、高效、灵敏度高,适用于柑橘类水果、蜜饯、辣椒油、火锅底料及肉制品等多种食品基质中柑橘红2号和苏丹红Ⅰ～Ⅳ染料的同时检测。     

QuEChERS-超高效液相色谱-串联质谱法快速测定辣椒红色素中9种非食用色素

采用QuEChERS前处理方法,结合超高效液相色谱-串联质谱多反应监测模式下的定性和定量分析,实现辣椒红色素中9种非食用色素的同时检测。辣椒红色素样品经乙腈溶液提取后,氯化钠进行盐析,C18吸附剂净化,取上清液进行超高效液相色谱-串联质谱分析。方法的基质效应影响在-0.17～0.07之间,检出限在0.2～1.5 ng/g之间,定量限在0.6～5.0 ng/g之间,碱性橙II、碱性橙21、碱性橙22、碱性嫩黄在0.2～8 ng/mL范围内线性关系良好,苏丹红I、苏丹红II、苏丹红III、苏丹红IV、罗丹明B在2～40 ng/mL范围内线性关系良好,目标物线性相关系数R2均大于0.995 0,9种非食用色素在3个样品加标水平的平均回收率均在69.6%～92.5%之间,相对标准偏差在2.8%～8.5%之间(n=5)。该方法简单快捷、准确可靠,适合于大批量天然植物提取物样品中非食用色素的快速检测。     

超高效液相色谱-串联质谱法检测食品中腰果过敏原

基于超高效液相色谱-串联质谱系统建立食品中腰果过敏原的定量检测方法。腰果经提取、胰蛋白酶酶解、净化后,经Easy-nLC 1000纳升液相色谱分离,随后进入四极杆-静电场轨道离子阱高分辨质谱以全扫描模式进行数据采集,使用ProteinPilot软件结合Uniprot蛋白数据库对样品扫描结果进行分析,并基于基本局部比对搜索工具(BLAST)验证肽段特异性,最终筛选出6条腰果特异性肽段,利用超高效液相色谱-三重四极杆质谱系统的多反应监测模式对实际样品进行检测。结果表明,该方法在0.005～10 mg/mL范围内线性关系良好,R²均大于0.99,固体基质中定量限为2.5～5 mg/kg,饮料基质中定量限为0.005～0.01 mg/mL,平均回收率在82.5%～109.9%之间,相对标准偏差不大于8.9%。该方法灵敏度高、特异性好,可用于饼干、面包、蛋糕、桃酥、巧克力和饮料6种食品基质中的腰果过敏原检测。     

超高效液相色谱-串联质谱法同时测定鸡蛋中7种色素

目的建立同时测定鸡蛋中7种色素含量的超高效液相色谱串联质谱(ultra performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)法。方法鸡蛋样品用乙腈超声提取。经Phenomenex Kinetex F5(100 mm×3.0 mm,2.6μm)色谱柱分离,流动相A:0.1%的甲酸/水溶液;流动相B:0.1%的甲酸/乙腈溶液作为流动相梯度洗脱。电喷雾离子源(electrospray ionization,ESI)正离子多反应监测模式定量分析。结果7种色素在浓度1～20μg/L范围内线性关系良好,相关系数r~2≥0.998。叶黄素、角黄素、苏丹红Ⅰ、苏丹红Ⅱ、苏丹红Ⅲ、苏丹红Ⅳ的检出限均为0.1μg/kg,核黄素的检出限为0.2μg/kg。7种色素在加标量2～10μg/kg范围内,回收率为80.2%～106.7%,相对标准偏差为1.5%～6.0%。结论该方法准确、快速、高效,可用于鸡蛋中色素的定性、定量分析。     

高效液相色谱-串联质谱法测定再制干酪中的三聚氰胺

目的建立高效液相色谱-串联质谱法准确、快速检测再制干酪中三聚氰胺的方法。方法样品中的三聚氰胺经2%的三氯乙酸溶液提取,乙酸铅沉淀蛋白、正己烷脱脂后,经CX固相萃取柱净化,通过高效液相色谱串联三重四极杆质谱联用仪进行测定,外标法定量。结果三聚氰胺含量在50～300 ng/mL的范围内与峰面积有良好的线性关系,相关系数为0.9999,方法定量限为10μg/kg。添加水平为10、50、100、200μg/kg的奶酪样品加标回收率为81.4%～103.2%,测定结果的相对标准偏差均小于7%(n=6)。结论该方法操作简便、定量准确、经济,适用于儿童奶酪等多种再制干酪产品中三聚氰胺测定。     

自然生长红辣椒中苏丹红染料鉴别及污染水平分析

利用超高效液相色谱-串联质谱(UPLC-MS/MS)技术对中国7大产区自然生长的红辣椒中的苏丹红染料(I~IV)污染物进行鉴别及污染水平分析。结果表明,在河南、新疆、甘肃、内蒙古、山东、河北、吉林7大产区,84%的红辣椒中被检出苏丹红I,含量在0.02~0.3μg/kg之间;44%的红辣椒中被检出苏丹红IV,含量在0.6~3μg/kg之间;苏丹红II和苏丹红III未检出。这一结果说明自然生长的红辣椒中普遍存在超痕量水平的苏丹红染料污染,经风险评估,如此低含量的污染不会对人健康造成危害。排除人为添加和交叉污染的原因,如此微量的污染可能来源于辣椒种植过程。未来还需对其具体污染源进行深入研究。     

超高效液相色谱串联质谱法测定鸡肝脏中的马杜霉素

本文采用超高效液相色谱-串联质谱法测定鸡肝脏中的马杜霉素残留。样品以乙腈提取,经HLB固相萃取柱净化,超高效液相色谱-串联质谱检测。方法定量限2μg/kg,线性范围2～100μg/m L;在马杜霉素添加水平为2～10μg/kg时,鸡肝脏中马杜霉素回收水平在78.5%～108.6%,方法稳定可靠,适合相应鸡肝脏产品的马杜霉素检测。     

利用UPLC-MS/MS测定牛奶中2种青霉素类药物的残留量

建立了一种应用超高效液相色谱-电喷雾串联三重四极杆质谱的方法、快速准确检测牛奶中氨苄青霉素及青霉素G残留量.试样经乙腈除去蛋白,离心取上清液,经氮气吹干后,用pH值为4.5的磷酸盐缓冲溶液溶解定容后,HLB固相提取小柱净化和富集,在优化选择的色谱及质谱条件下,采用多反应监测进行定量.结果表明:采用Waters ACQUITY UPLC BEH C18色谱柱分离,以含有体积分数为0.1%甲酸的水溶液和乙腈为流动相进行梯度洗脱,仪器检出限为1.0～2.0μg/kg,在1～100 μg/kg的线性范围内,相关系数Υ为0.999以上,回收率为81.7%-102.8%.该方法可准确快速测定牛奶中氨苄青霉素及青霉素G类药物的质量分数,结果准确可靠,重复性好,灵敏度高.     

TripleTOF^TM 5600液相色谱高分辨串联质谱仪

液相色谱高分辨串联质谱仪（TripleTOFTM 5600 LC/MS/MS）是AB Sciex公司新近推出的分析仪器,它是世界上首台集准确质量数、高分辨率、高速扫描速度和高定量灵敏度等优点于一体的质谱系统平台。     

Direct nanoHPLC-ESI-QTOF MS/MS analysis of tryptic caseinophosphopeptides

Caseinophosphopeptides (CPPs) were generated following tryptic hydrolysis of sodium caseinate. Hydrolysate peptides were separated and identified using nano-HPLC ESI-QTOF MS/MS. Sequence coverage in the 3 h hydrolysate was 79.4%, 55.6%, 80.9% and 68.1% for α_s1-, α_s2-, β- and κ-casein (CN), respectively. Variable levels of serine phosphorylation in β-CN f1–25 were observed in the 3 h hydrolysate. Analysis of β-CN f1–25 4P demonstrated that this peptide was stable during the course of hydrolysis. The effect of heat treatment (75 °C, 45 min) at pH 6.0, 7.0 and 8.0 on the peptide profile of the 3 h hydrolysate was studied. Compared to pH 6.0 and 8.0, least modification in phosphopeptide profiles was observed for the hydrolysate sample heated at pH 7.0. Different dephosphorylation and oxidation patterns were also observed following heat treatment at the three pH values. These results demonstrate that heat treatment, in addition to pH, has a major effect on both the phosphorylated and non-phosphorylated peptide profiles of CN hydrolysates.     

三聚氰胺检测五LC/MS/MS法分析食品中的三聚氰胺

奶粉类食品前处理 1.所需试剂及耗材 1%三氯乙酸溶液,0.1mol/L盐酸溶液,5%氨水-甲醇溶液,以及Oasis MCX固相萃取柱(60mg/3mL,或相当者),使用前分别用3mL甲醇、3mL0.1mol/L盐酸溶液对固相萃取柱进行预处理,并保持柱体的湿润.     

Determination of aflatoxins in food using LC/MS/MS

 A liquid chromatography/atmospheric pressure chemical ionization tandem mass spectrometric method is described for the determination of aflatoxins B₁, B₂, G₁ and G₂ in food with the use of aflatoxin M₁ as an internal standard. The method works well with matrices such as those of figs and peanuts, but there are problems with spices, due to limitations of the clean-up method used. Received: 15 October 1997     

高效液相色谱 串联质谱法测定纺织品中苯并三唑类紫外线吸收剂

通过萃取和优化仪器条件,建立了高效液相色谱 串联质谱法（HPLC MS/MS）测定纺织品中2 (2′ 羟基 5′ 甲基苯基) 苯并三唑的含量,并分析了该物质的质谱图和母离子可能的裂解机理。方法采用Varian Pursuit XRs C18色谱柱,含0.1%甲酸的CH3CN H2O溶液(65〖KG-*5〗∶〖KG-*5〗35)作为流动相,并以多反应监测模式进行定性定量分析。结果表明,在0.01~50.00 mg/L范围内,UV P峰面积S与浓度C呈良好的线性关系,回归方程为S=1.0×107C+2.0×106,相关系数为0.999 8,以3σ计算得UV P的检出限为3 ng/L,平均回收率为96.4%~102.6%。该方法灵敏度高、操作简便,可用于纺织品中苯并三唑类紫外线吸收剂中UV P的日常检测。     

液相色谱-串联质谱术在生态纺织品检测中的应用

伴随人们环保和安全意识的提高,生态纺织品的安全检测越来越受到人们的关注.本文介绍液相色谱-串联质谱技术在生态纺织品有害物质,如禁用偶氮、致癌致敏染料、烷基酚聚氧乙烯醚、杀虫剂残留测定中的应用.     

Multiresidue method for pesticides and veterinary drugs in bovine milk using GC/MS and LC/MS/MS

A simple, sensitive and selective method with gas chromatography/mass spectrometry (GC/MS) and liquid chromatography/tandem mass spectrometry (LC/MS/MS) has been developed to detect 342 pesticides and veterinary drugs contaminating bovine milk at the maximum residue limits (MRLs) defined in the "positive list system". Sample preparation was performed by extracting the analytes with acetonitrile, followed by salting-out with sodium chloride. For some pesticides, the extract was further cleaned up by n-hexane partitioning and PSA cartridge column chromatography. GC/MS-EI or -NCI was used to determine pesticide residues, while LC/MS/MS-ESI was applicable to the determination of pesticide and veterinary drug residues. The variation of the recoveries of these drugs at MRL was relatively wide; however the relative standard deviations of the recovery of each drug were within 28%, suggesting that the present method is good enough for use as a screening test for contaminants at the MRLs. These results show that this method is useful for multiresidue analysis of numerous pesticides and veterinary drugs in bovine milk.     

Simultaneous determination of quinolones in foods by LC/MS/MS

A simple method was developed for the simultaneous determination of seven quinolones (enoxacin, ofloxacin, ciprofloxacin, danofloxacin, lomefloxacin, enrofloxacin and sarafloxacin) in foods using liquid chromatography coupled with electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS). The seven quinolones were extracted with acetonitrile containing 0.2% formic acid, and the extracted solution was cleaned up on a C18 cartridge. The extract was diluted with 5 mmol/L IPCC-MS3 for injection into the LC-ESI-MS/MS. The LC separation was carried out on an ODS column with gradient elution of 5 mmol/L IPCC-MS3-acetonitrile as the mobile phase. Mass spectral acquisition was done in the positive ion mode by applying selected reaction monitoring (SRM). The recoveries of the seven quinolones were mostly greater than 60% from foods fortified at 10 ng/g. The detection limits in foods were 2 ng/g for enoxacin and ciprofloxacin, and 1 ng/g for the other drugs. Twenty cattle muscle, 7 swine muscle, 9 chicken muscle, 16 milk, 19 prawn and 20 broiled eel samples from retail markets were analyzed by this method. Enrofloxacin and its metabolite ciprofloxacin were detected in 9 broiled eel at the level of trace (tr)-34 ng/g and tr-10 ng/g, respectively.