超声萃取-气相色谱-质谱法检测塑料玩具中8种邻苯二甲酸酯类增塑剂

建立了气相色谱-质谱法（GC-MS）同时测定玩具中8种邻苯二甲酸酯化合物的方法.利用四氢呋喃提取塑料玩具中邻苯二甲酸酯化合物,超声提取30 min,经乙腈沉淀,采用GC-MS外标法进行定量检测.结果表明,8种邻苯二甲酸酯线性范围为0.5~10 mg/L,相关系数均大于0.995,方法检出限为1.14~13.65 mg/kg,平均回收率为89.2%~103.8%,相对标准偏差为1.41%~4.93%.方法简单、快速、准确,可用于塑料玩具中邻苯二甲酸酯的检测.     

超高效液相色谱-四极杆-飞行时间质谱法筛查塑料玩具中邻苯二甲酸酯类增塑剂

建立了塑料玩具中15种邻苯二甲酸酯类增塑剂的超高效液相色谱-四极杆-飞行时间质谱(UPLC-Q-TOF MS)筛查与定量检测方法。不同基质的塑料玩具样品采用溶剂溶解-超声提取-沉淀分离,经石墨化碳固相萃取柱净化、旋转蒸发和氮吹浓缩后,以C_(18)柱(2.1 mm×50 mm,1.7μm)梯度洗脱分离,在电喷雾正离子及一级全扫描和信息相关二级全扫描模式下检测。以一级精确质量数、同位素分布、保留时间及二级质谱与数据库匹配结果 4种手段准确定性,一级提取离子的峰面积定量。实验结果表明,15种邻苯二甲酸酯的质量偏差均小于3 ppm,在各自线性范围内线性关系良好,相关系数(r2)均大于0.996,检出限和定量下限分别为4.66~11.69μg/kg和13.04~30.71μg/kg,日内和日间精密度分别小于3.8%和6.7%,低、中、高3个加标水平的回收率为80.5%~108.3%,相对标准偏差(n=6)为0.4%~12.3%。在实际样品检测中,1例塑料玩具样品中检出邻苯二甲酸苄基丁基酯,含量为136.9μg/kg。该方法准确、高效、灵敏度高,可用于塑料玩具的实际检测。     

GC-MS法测定白酒中邻苯二甲酸酯残留量

采用正己烷提取白酒中的16种邻苯二甲酸酯类增塑剂,建立了气相色谱-质谱联用法测定白酒中污染物邻苯二甲酸酯类增塑剂残留量的检测方法。该方法对白酒中16种邻苯二甲酸酯化合物的检测限为0.05 mg/kg,方法的检测浓度线性范围为0.5~5.0 mg/L,样品的加标回收率为80.0%~95.0%,测定结果的相对标准偏差为2.1%~7.0%(n=6)。该方法可以满足白酒中污染物邻苯二甲酸酯检测的需要。     

超声萃取-高效液相色谱法检测塑料玩具中双酚A及其类似物

建立了超声萃取-高效液相色谱法(HPLC)同时测定玩具中7种双酚A及其类似化合物的方法. 利用四氢呋喃超声提取塑料玩具中双酚A及其类似物30 min,经甲醇沉淀分离塑料基质. 提取液经浓缩、氮吹,加甲醇定容,采用HPLC外标法进行定量检测. 结果表明,7种双酚A类化合物线性范围为0.1~5.0 mg/L,相关系数均大于0.998 8,方法检出限为0.24~0.72 mg/kg,平均回收率为92.7%~108.7%,相对标准偏差为1.9%~7.1%. 方法简单、快速、准确,可用于塑料玩具中双酚A类化合物的检测.     

色谱-质谱联用技术测定化妆品中25种邻苯二甲酸酯

建立了乳液、霜、水以及油类化妆品中25种邻苯二甲酸酯类化合物的气相色谱-质谱和液相色谱-质谱测定方法。不同基质样品经不同方法净化处理后,采用气相色谱-质谱或液相色谱-质谱进行测定。气相色谱-质谱法采用DB-5MS毛细管色谱柱(30 m,250 mm×0.25μm),程序升温,选择离子模式同时测定21种邻苯二甲酸酯类化合物。液相色谱-质谱采用MN EC-C18色谱柱(4.6×100 mm,2.7μm),以甲醇和0.1%甲酸为流动相,梯度洗脱,流速0.7 mL/min,采用电喷雾电离(ESI+),多反应监测(MRM)模式同时测定24种邻苯二甲酸酯类化合物。25种邻苯二甲酸酯类化合物的线性关系良好,相关系数均大于0.999,回收率实验结果为89.3%~105.6%,RSD为0.4%~4.0%,检出限均小于0.3 mg/kg。方法适用于化妆品中邻苯二甲酸酯类化合物的全面筛查。     

气相色谱-质谱法测定橡皮擦中五种邻苯二甲酸酯增塑剂含量

本文建立了一种橡皮擦中5种邻苯二甲酸酯增塑剂的气相色谱-质谱检测方法。采用乙酸乙酯加热搅拌的方法提取目标物,选择离子模式检测,外标法定量。优化的前处理和测定条件下,5种目标物的平均回收率为81.18%~117.92%,相对标准偏差在1.14%~5.57%之间。通过该方法对国内市场上8种橡皮擦样品进行检测,结果5种样品检出邻苯二甲酸二(2-乙基)己酯,含量超过0.1%。     

液相色谱/串联质谱法测定水中邻苯二甲酸酯类化合物

建立了直接进样-超高效液相色谱/三重四极杆串联质谱法同时测定水中6种邻苯二甲酸酯类化合物的方法。水样经离心后取上清液进样,采用BEH C18柱,以水(0.1%甲酸)-乙腈作为流动相进行梯度洗脱,采用串联质谱进行检测。实验通过在液相色谱系统中装入一根吸附分配柱,很好地解决了液相色谱系统的干扰问题。6种邻苯二甲酸酯类在一定范围内线性良好(r=0.9990~0.9996),回收率为84.3%~102%,相对标准偏差为1.0%~8.7%,方法检出限为0.05~0.5μg/L。方法适用于测定地表水中6种邻苯二甲酸酯类化合物的残留。     

QuEChERS-气相色谱-三重四极杆质谱法检测黄瓜中的19种邻苯二甲酸酯

建立了QuEChERS结合气相色谱-三重四极杆质谱联用仪同时检测黄瓜中19种邻苯二甲酸酯残留的方法。黄瓜样品采用乙腈超声提取,经无水硫酸镁和氯化钠盐析离心后减压蒸馏富集,然后用C18吸附剂净化,经HP-5ms UI色谱柱分离后在多反应监测模式下进行测定。该方法在10~5000 μg/kg范围内线性关系良好(r ≥ 0.9995),检出限为0.2~3.5 μg/kg。按照建立的方法分别进行了10、100和500 μg/kg 3个添加水平的19种邻苯二甲酸酯的加标回收率试验,回收率为63.3%~127.8%,相对标准偏差为0.5%~13.3%。该方法灵敏度高、准确度好,符合多残留检测的技术要求,适用于黄瓜等蔬菜中邻苯二甲酸酯残留的检测。     

气相色谱–质谱法测定白酒中的邻苯二甲酸酯类

采用气相色谱–质谱法对常见名贵白酒中的16种邻苯二甲酸酯类含量进行测定。将样品提取、净化后,经气相色谱–质谱联用仪进行分离测定。采用特征选择离子检测扫描(SIM),以色谱保留时间和色谱碎片的丰度比定性,以峰面积外标法定量。16种邻苯二甲酸酯类物质的含量与色谱峰面积在0~2.0μg/m L范围内线性良好,线性相关系数均在0.995以上,方法检出限为0.05 mg/L。16种邻苯二甲酸酯含量测定结果的相对标准偏差均小于10%(n=6),加标回收率为91.21%~105.22%。该方法样品前处理简单,灵敏度高,适用于同时定性及定量检测白酒中16种邻苯二甲酸酯。     

超高效合相色谱快速检测塑料制品中的15种邻苯二甲酸酯

建立了使用超高效合相色谱检测塑料中15种邻苯二甲酸酯的方法。样品经正己烷超声萃取,过0.45 μ m有机膜后上机测试。采用ACQUITY UPC² HSS C18 SB色谱柱（150 mm×3 mm, 1.8 μ m）,以超临界CO₂流体为主流动相、乙腈为流动相改性剂进行梯度洗脱,流速为1.5 mL/min。在系统背压为12.41 MPa、色谱柱温度为65 ℃、二极管阵列检测器（PDA）检测波长为220 nm的条件下,15种邻苯二甲酸酯可以在8 min内实现分离检测。实验结果表明：15种邻苯二甲酸酯的线性范围为0.5~10 mg/L,相关系数大于0.9960,检出限（S/N=3）为1.0~2.2 mg/kg,加标回收率为78.1%~122.3%,相对标准偏差为2.95%~8.26%。该方法分析速度快,为邻苯二甲酸酯类物质的检测提供了新的选择。     

塑料玩具中酚类环境雌激素在模拟汗液和唾液中溶出行为研究

建立了快速溶剂萃取-超高效液相色谱法同时测定塑料玩具中5种环境雌激素(EES)的分析方法。将塑料玩具样品剪碎后,用二氯甲烷作溶剂经快速溶剂萃取、浓缩、过滤,用超高效液相色谱ACQUITY UPLC-BEHC18柱(50 mm×2.1 mm,1.7μm)分离,以乙腈-水为流动相,梯度洗脱,流速0.4 mL/min;检测波长200 nm,外标法定量。该方法回收率为93.7%～98.2%,测定结果的相对标准偏差为0.4%～2.1%(n=6),检出限为0.11～0.42ng/mL。此方法可作为测定塑料玩具中酚类环境雌激素的分析方法。     

荧光法快速测定邻苯二甲酸酯的总量

基于邻苯二甲酸酯在浓硫酸下荧光增强的原理构建了一种测定邻苯二甲酸酯总量的荧光分析新方法。 体系的荧光强度与邻苯二甲酸酯的浓度在5.00~600 μg/L的范围内呈线性关系,方法的检出限为0.57 μg/L,回收率在91.6%~105.1%之间。 该方法简单、快速、灵敏度高、线性范围宽。 用于塑料水杯和聚氯乙烯水管中邻苯二甲酸酯总量的测定,结果令人满意。     

固相萃取-反相高效液相色谱法测定水中的邻苯二甲酸酯

建立了固相萃取-反相高效液相色谱法检测水中3种邻苯二甲酸酯类物质邻苯二甲酸二甲酯、邻苯二甲酸二(2-乙基己基)酯、邻苯二甲酸二正辛酯的方法. 考察了固相萃取柱、洗脱溶剂、洗脱体积、上样速度以及洗脱速度对萃取效率的影响. 通过综合分析, 选定SupelcleanLC-18 SPE Tube固相萃取柱, 甲醇为洗脱剂, 洗脱体积2 mL, 上样速度为4 mL/min, 洗脱速度为1 mL/min. 在此萃取条件下, 萃取回收率在83.4%～121.2%之间. 邻苯二甲酸二甲酯、邻苯二甲酸二(2-乙基己基)酯、邻苯二甲酸二正辛酯质量浓度在2～100 mg/L之间均为线性. 经萃取后, 方法的最低检出限分别为邻苯二甲酸二甲酯0.06 μg/L, 邻苯二甲酸二(2-乙基己基)酯0.16 μg/L, 邻苯二甲酸二正辛酯0.08 μg/L. 方法的精密度在10%～15%之间. 应用该方法测定自来水中酞酸酯类化合物的含量, 加标回收率为83.6%～110.2%.     

Identification of 19 phthalic acid esters in dairy products by gas chromatography with mass spectrometry

A detection method for 19 kinds of phthalic acid ester compounds analyzed by n‐hexane/ether/acetonitrile 1:7:8 v/v/v mixed solvent extraction, quick, easy, cheap, effective, rugged, and safe purification and internal standard method of quantitative gas chromatography with mass spectrometry was established. This method can effectively remove interfering materials, such as lipids, fatty acids, and pigments, from dairy products. The 19 kinds of phthalic acid ester compounds were within a 0.025–0.2 mg/kg range, the recovery rate was 65.2–125.7%, relative standard deviation was 7.9–15.4% (n = 6), and the limit of detection was 0.005–0.02 mg/kg. Concentrations of the 19 kinds of phthalic acid ester compounds ranged between 0.01 and 0.12 mg/kg in ten dairy materials and 20 dairy products. The established method is simple, rapid, accurate, and highly sensitive.     

气相色谱质谱法同时测定建筑用胶中苯系物和邻苯二甲酸酯类增塑剂

建立了建筑用胶中苯系物和邻苯二甲酸酯类增塑剂等10种物质同时测定的气相色谱质谱法,对提取方法及色谱条件进行了研究,各物质的检出限在0.2～0.8 mg/L之间。在两个添加水平下,水基型和溶剂型建筑用胶中苯系物及邻苯二甲酸酯类增塑剂的回收率在98.1%～101.5%之间。5个实验室间对相同建筑用胶样品测定的相对标准偏差在1.9%～3.9%之间。     

Rapid analysis of phthalic acid esters in environmental water using fast elution gas chromatography with mass spectrometry and adaptive library spectra

A method for the fast determination of the components in a complex sample by using gas chromatography with mass spectrometry was developed and used for the quantitative analysis of phthalic acid esters in environmental water. In the method, the adaptively corrected mass spectra were used to compensate for the differences between the library spectra and the measured ones in the experiment. The correction was obtained by the iterative transformation of the library spectra using iterative target transformation factor analysis, and the resolution was performed by non‐negative immune algorithm using the corrected spectra. Rapid analysis of 16 phthalic acid esters in water samples was achieved using fast elution gas chromatography with mass spectrometry measurements. The results show that the mass spectra and chromatographic profiles of the phthalic acid esters can be obtained from the overlapping signal of 13 min elution, and accurate quantitative analysis can be obtained. The recoveries of the phthalic acid esters obtained by standard addition are between 90.3 and 107.4%, and the relative standard deviations obtained in repeated measurements are less than 9%.     

分散固相萃取-气相色谱-质谱法测定含油脂食品中17种邻苯二甲酸酯

建立了含油脂食品中17种邻苯二甲酸酯的分散固相萃取-气相色谱-质谱法检测方法。奶茶样品经乙腈-甲基叔丁基醚(9∶1,V/V)提取后,提取液用MAS-PAEC分散固相萃取管进行净化。调味包样品经乙腈(正己烷饱和)-甲基叔丁基醚(19∶1,V/V)提取2次后,提取液用CNW分散固相萃取管进行净化。采用基质匹配标准外标法进行定量分析。结果表明,奶茶中17种邻苯二甲酸酯的加标回收率为82.2%～125.4%;相对标准偏差小于16.5%;方法检出限为100～200μg/L。调味包中17种邻苯二甲酸酯的加标回收率为70.9%～115.5%;相对标准偏差小于9.8%;方法检出限为400～800μg/L。本方法快速、精确、简易、廉价、稳定,可应用于含油脂食品中17种邻苯二甲酸酯的实际检测分析。     

Micro-determination of total phthalate esters in biological samples by gas-liquid chromatography.

A method was investigated in which all of the phthalate esters in biological samples were determined as phthalic acid by gas-liquid chromatography. The method is based on the separation of phthalate esters from the sample with n-hexane, saponification of the esters with an alkaline ethanolic solution to give phthalic acid, purification of the acid by extraction with diethyl ether and column chromatography using silica gel, and conversion of the acid into bis(2,2,2-trifluoroethyl) phthalate with a 2,2,2-trifluoroethanol solution containing boron trifluoride. The derivative obtained is highly sensitive to an electron-capture detector, giving a sensitivity of 0.1 pg. Biological samples fortified with di(2-ethylhexyl) phthalate at levels of 5-100 ppb were analyzed, with recoveries of 70-100%.     

Development of a simple and valid method for the trace determination of phthalate esters in human plasma using dispersive liquid–liquid microextraction coupled with gas chromatography–mass spectrometry

A new method was developed for the trace determination of phthalic acid esters in plasma using dispersive liquid–liquid microextraction and gas chromatography with mass spectrometry analysis. Plasma proteins were efficiently precipitated by trichloroacetic acid and then a mixture of chlorobenzene (as extraction solvent) and acetonitrile (as dispersive solvent) rapidly injected to clear supernatant using a syringe. After centrifuging, chlorobenzene sedimented at the bottom of the test tube. 1 μL of this sedimented phase was injected into the gas chromatograph for phthalic acid esters analysis. Different factors affecting the extraction performance, such as the type of extraction and dispersive solvent, their volume, extraction time, and the effects of salt addition were investigated and optimized. Under the optimum conditions, the enrichment factors and extraction recoveries were satisfactory and ranged between 820–1020 and 91–97%, respectively. The linear range was wide (50–1000 ng/mL) and limit of detection was very low (1.5–2.5 ng/mL for all analytes). The relative standard deviations for analysis of 1 μg/mL of the analytes were between 3.2–6.1%. Salt addition showed no significant effect on extraction recovery. Finally, the proposed method was successfully utilized for the extraction and determination of the phthalic acid esters in human plasma samples and satisfactory results were obtained.     

Simultaneous determination of seven phthalic acid esters in beverages using ultrasound and vortex‐assisted dispersive liquid–liquid microextraction followed by high‐performance liquid chromatography

A sensitive, rapid, and simple high‐performance liquid chromatography with UV detection method was developed for the simultaneous determination of seven phthalic acid esters (dimethyl phthalate, dipropyl phthalate, di‐n‐butyl phthalate, benzyl butyl phthalate, dicyclohexyl phthalate, di‐(2‐ethylhexyl) phthalate, and di‐n‐octyl phthalate) in several kinds of beverage samples. Ultrasound and vortex‐assisted dispersive liquid–liquid microextraction method was used. The separation was performed using an Intersil ODS‐3 column (C₁₈, 250 × 4.6 mm, 5.0 μm) and a gradient elution with a mobile phase consisting of MeOH/ACN (50:50) and 0.2 M KH₂PO₄ buffer. Analytes were detected by a UV detector at 230 nm. The developed method was validated in terms of linearity, limit of detection, limit of quantification, repeatability, accuracy, and recovery. Calibration equations and correlation coefficients (> 0.99) were calculated by least squares method with weighting factor. The limit of detection and quantification were in the range of 0.019–0.208 and 0.072–0.483 μg/L. The repeatability and intermediate precision were determined in terms of relative standard deviation to be within 0.03–3.93 and 0.02–4.74%, respectively. The accuracy was found to be in the range of –14.55 to 15.57% in terms of relative error. Seventeen different beverage samples in plastic bottles were successfully analyzed, and ten of them were found to be contaminated by different phthalic acid esters.