Determination of 4 Alternaria Mycotoxins in Sunflower Seeds by Ultra-High Performance Liquid Chromatography Tandem Mass Spectrometry
摘 要
取2.5 g已粉碎的葵花籽样品,加入500.0 μL含100.0 μg·L-1交链孢酚单甲醚-d3(AME-d3)、1 000.0 μg·L-1滕毒素-d3(TEN-d3)和交链孢酚-d2(AOH-d2)、5 000.0 μg·L-1细交链孢菌酮酸-d13(TeA-d13)的混合内标溶液,混匀,放置过夜,用25.0 mL体积比为45∶10∶45的乙腈-甲醇-0.05 mol·L-1磷酸二氢钠溶液(pH 3.0)混合液振荡提取,离心。取上清液,用水定容至30.0 mL,分取6.0 mL,加入15.0 mL 0.05 mol·L-1磷酸二氢钠溶液(pH 3.0),过Waters Oasis HLB固相萃取柱(预先用5.0 mL甲醇和5.0 mL水活化),用20%(体积分数)甲醇溶液淋洗,抽干固相萃取柱,用10 mL体积比为1∶1的含1%(体积分数)氨水的甲醇-乙腈混合液进行洗脱。将洗脱液于40 ℃氮吹至近干,残渣用200.0 μL甲醇复溶,并用水定容至2.0 mL,所得溶液采用超高效液相色谱-串联质谱法测定其中交链孢酚(AOH)、交链孢酚单甲醚(AME)、细交链孢菌酮酸(TeA)和腾毒素(TEN)等4种交链孢霉毒素的含量,内标法定量。结果表明,Waters Oasis HLB固相萃取柱净化效果最佳,在洗脱剂中加入氨水有利于改善峰形,基线更平滑;4种交链孢霉毒素的质量浓度在一定范围内与对应的峰面积和内标峰面积的比值呈线性关系,测定下限(10S/N)为0.15~1.50 μg·kg-1。按照标准加入法进行回收试验,回收率为75.0%~112%。对实际样品做7组平行,测定值的相对标准偏差均小于13%。方法用于实际样品分析,结果显示检出率和检出量最高的是TeA,平均值为1 890.16 μg·kg-1,TEN次之,平均值为20.26 μg·kg-1。
Abstract
The finely ground sunflower seed sample (2.5 g) was taken, and 500.0 μL of a mixed internal standard solution containing 100.0 μg·L-1 of alternariol monomethyl ether-d3 (AME-d3), 1 000.0 μg·L-1 of tentoxin-d3 (TEN-d3) and alternariol-d2 (AOH-d2), and 5 000.0 μg·L-1 of tenuazonic acid-d13 (TeA-d13) was added. After mixing well and settling for overnight, the mixture was extracted in 25.0 mL of a mixture of acetonitrile, methanol, and 0.05 mol·L-1 sodium dihydrogen phosphate solution (pH 3.0) at a volume ratio of 45∶10∶45, and then centrifuged. The supernatant was taken, and made its volume up to 30.0 mL with water. An aliquot (6.0 mL) was taken, and 15.0 mL of 0.05 mol·L-1 sodium dihydrogen phosphate solution (pH 3.0) was added. The mixture was passed through Waters Oasis HLB solid phase extraction column (pre-activated with 5.0 mL of methanol and 5.0 mL of water), and washed with 20% (volume fraction) methanol solution. After drying the solid phase extraction column, it was eluted with 10 mL of a mixture of methanol containing 1% (volume fraction) ammonia and acetonitrile at a volume ratio of 1∶1. The eluent was blown to near dryness at 40 ℃ by nitrogen, and then the residue was redissolved in 200.0 μL of methanol and made its volume up to 2.0 mL with water. The 4 Alternaria mycotoxins including alternariol (AOH), alternariol monomethyl ether (AME), tenuazonic acid (TeA), and tentoxin (TEN) in the obtained solution were determined by ultra-high performance liquid chromatography tandem mass spectrometry, and internal standard method was used for quantitative analysis. As shown by the results, Waters Oasis HLB solid phase extraction column had the best purification effect, and adding ammonia to the eluant was beneficial for improving peak shape and making the baseline smoother. Linear relationships between values of mass concentration and peak area ratio of targets to internal standards were found in definite ranges, with lower limits of determination (10S/N) in the range of 0.15-1.50 μg·kg-1. Test for recovery was made by standard addition method, giving results in the range of 75.0%-112%. 7 parallel tests were performed on the actual sample, with RSDs of the determined values less than 13%. This method was applied to the analysis of actual samples, and it was shown that the highest detection rate and detection amount were for TeA, with an average value of 1 890.16 μg·kg-1, followed by TEN with an average value of 20.26 μg·kg-1.
中图分类号 O657.63 DOI 10.11973/lhjy-hx202309003
所属栏目 工作简报
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收稿日期 2022/1/24
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备注毕珊,副主任技师,硕士,从事卫生理化检验及食品质量安全研究
引用该论文: BI Shan,WU Yutian,YANG Shaoqun,LIU Guirong,WANG Yingyi,ZHAO Zhengyu. Determination of 4 Alternaria Mycotoxins in Sunflower Seeds by Ultra-High Performance Liquid Chromatography Tandem Mass Spectrometry[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2023, 59(9): 1008~1013
毕珊,吴玉田,杨绍群,刘贵荣,王颖怡,赵正雨. 超高效液相色谱-串联质谱法测定葵花籽中4种交链孢霉毒素的含量[J]. 理化检验-化学分册, 2023, 59(9): 1008~1013
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参考文献
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【11】吴振兴,程果,肖西志,等.固相萃取-液相色谱-串联质谱法检测番茄酱中6种交链孢霉毒素[J].食品安全质量检测学报, 2019,10(3):700-704.
【12】韦迪哲,王蒙,王瑶,等.超高效液相色谱-串联质谱法同时测定番茄酱中18种真菌毒素[J].食品安全质量检测学报, 2017,8(9):3304-3309.
【2】AUTHORITY E F S, ARCELLA D, ESKOLA M, et al. Dietary exposure assessment to Alternaria toxins in the European population[J]. EFSA Journal, 2016,14(12):4654.
【3】ALEXANDER J, BENFORD D, BOOBIS A, et al. Scientific opinion on the risks for animal and public health related to the presence of Alternaria toxins in feed and food[J]. EFSA Journal, 2011,9(10):2407.
【4】沈友明,聂继云,李志霞,等.果品中真菌毒素的污染、毒性、生物合成及影响因素研究进展[J].食品科学, 2018,39(9):294-304.
【5】SOLHAUG A, VINES L L, IVANOVA L, et al. Mechanisms involved in alternariol-induced cell cycle arrest[J]. Fundamental and Molecular Mechanisms of Mutagenesis, 2012,738/739:1-11.
【6】SAUER D B, SEITZ L M, BURROUGHS R, et al. Toxicity of Alternaria metabolites found in weathered sorghum grain at harvest[J]. Journal of Agricultural and Food Chemistry, 1978,26(6):1380-1383.
【7】姜楠,王蒙,韦迪哲,等.果蔬中真菌毒素污染及臭氧防治研究进展[J].食品安全质量检测学报, 2016,7(11):4415-4420.
【8】PATRIARCA A. Alternaria in food products[J]. Current Opinion in Food Science, 2016,11:1-9.
【9】LÓPEZ P, VENEMA D, DE RIJK T, et al. Occurrence of Alternaria toxins in food products in The Netherlands[J]. Food Control, 2016,60:196-204.
【10】HICKERT S, BERGMANN M, ERSEN S, et al. Survey of Alternaria toxin contamination in food from the German market, using a rapid HPLC-MS/MS approach[J]. Mycotoxin Research, 2016,32(1):7-18.
【11】吴振兴,程果,肖西志,等.固相萃取-液相色谱-串联质谱法检测番茄酱中6种交链孢霉毒素[J].食品安全质量检测学报, 2019,10(3):700-704.
【12】韦迪哲,王蒙,王瑶,等.超高效液相色谱-串联质谱法同时测定番茄酱中18种真菌毒素[J].食品安全质量检测学报, 2017,8(9):3304-3309.
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