Adsorption of Phthalic Acid Esters by Humic Acid and Its Research Progress

Humic acid is rich in highly electronegative oxygen-containing organic functional groups,so it has high reactivity and can adsorb phthalic acid ester(PAEs)in the environment to reduce the risk of environmental pollution from PAEs.In this paper,the extraction,characterization and adsorption models of humic acid were reviewed,and the research status of adsorption of PAEs by humic acid was further summarized.Based on these,the feasibility and observable application prospect of humic acid as a cheap adsorbent were analyzed.

Abiotic degradation of four phthalic acid esters in aqueous phase under natural sunlight irradiation

Abiotic degradability of four phthalic acid esters （PAEs） in the aquatic phase was evaluated over a wide pH range 5-9. The PAE solutions in glass test tubes were placed either in the dark and under the natural sunlight irradiation for evaluating the degradation rate via hydrolysis or photolysis plus hydrolysis, respectively, at ambient temperature for 140 d from autumn to winter in Osaka, Japan. The efficiency of abiotic degradation of the PAEs with relatively short alkyl chains, such as butylbenzyl phthalate （BBP） and di-nbutyl phthalate （DBP）, at neutral pH was significantly lower than that in the acidic or alkaline condition. Photolysis was considered to contribute mainly to the total abiotic degradation at all pH. Neither hydrolysis nor photolysis of di-ethylhexyl phthalate （DEHP） proceeded significantly at any pH, especially hydrolysis at neutral pH was negligible. On the other hand, the degradation rate of di- isononyl phthalate （DINP） catalyzed mainly by photolysis was much higher than those of the other PAEs, and was almost completely removed during the experimental period at pH 5 and 9. As a whole, according to the half-life （t1/2） obtained in the experiments, the abiotic degradability of the PAEs was in the sequence： DINP （32-140 d） 〉 DBP （50-360 d）, BBP （58-480 d） 〉 DEHP （390-1600 d） under sunlight irradiation （via photolysis plus hydrolysis）. Although the abiotic degradation rates for BBP, DBP, and DEHP are much lower than the biodegradation rates reported, the photolysis rate for DINP is comparable to its biodegradation rate in the acidic or alkaline condition.

Biodegradability of four phthalic acid esters under anaerobic condition assessed using natural sediment

Biodegradability of di-n-butyl phthalate （DBP）, butylbenzyl phthalate （BBP）, di-ethylhexyl phthalate （DEHP）, and di-isononyl phthalate （DINP） under an anaerobic condition was evaluated using three natural sediment microcosms obtained from ponds in Osaka, which had not been significantly polluted by the chemicals. The degradabilities of the four phthalic acid esters（PAEs） were analyzed by a first-order kinetic model with a lag phase and ranked as DBP〉BBP〉〉DEHP〉DINP. The PAEs with shorter alkyl-chains, DBP and BBP, were degraded with quite short lag phases near to zero and short half-lives of a few days. The PAEs with longer alkyl-chains, DEHP and DINP, were degraded with lag phases of 5-30 d and the quite long half-lives of a couple of hundred days. Although no data was available on the anaerobic biodegradability of D1NP before this study, it was clarified that DINP can be degraded with slow degradation rates. The fact that all the three intact sediments were capable of biodegradation of the PAEs suggests that potential of anaerobic biodegradation of PAEs is widespread in the aquatic environment.

QSPR Analysis of the Physicochemical Properties for Phthalic Acid Esters

Based on quantitative structure-property relationship （QSPR） of organic compounds, the molecular connectivity indices of 21 phthalic acid ester compounds were extracted. Relationship between the physicochemical properties （n-octanol/air partition coefficient, vapor pressure, water solubility） and the molecular connectivity indices of phthalic acid ester compounds have been established by multiple linear regression （MLR） method. The results showed that the zero-order valence connectivity index （0Xu） is the topology parameter which affects octanol/water partition coefficient and water solubility, and the topology parameter which affects vapor pressure is the first-order connectivity index （1X）. This indicated to a certain extent_that the molecular connectivity indices can be well used to express the quantitative relationship between the physicochemical properties and structure descriptions of phthalic acid ester compounds. The models constructed have good robustness and highly predictive capability.

Concentration and source identification of polycyclic aromatic hydrocarbons and phthalic acid esters in the surface water of the Yangtze River Delta,China

The pollution from polycyclic aromatic hydrocarbons（PAHs） and phthalic acid esters（PAEs） in the surface water of the rapidly urbanized Yangtze River Delta region was investigated.Fourteen surface water samples were collected in June 2010.Water samples were liquid-liquid extracted using methylene chloride and analyzed by gas chromatography-mass spectrometry.Concentrations of PAHs and PAEs ranged 12.9-638.1 ng/L and 61-28550 ng/L,respectively.Fluoranthene,naphthalene,pyrene,phenanthrene,di-2ethylhexyl phthalate,and di-n-butyl phthalate were the most abundant compounds in the samples.The water samples were moderately polluted with benzo[a]pyrene according to China＇s environmental quality standard for surface water.The two highest concentrations of PAHs and PAEs occurred in samples from Taihu Lake,Wuxi City and the western section of Yangchenghu Lake.Potential sources of pollution at S7 were petroleum combustion and the plastics industry,and at Yangchenghu Lake were petroleum combustion and domestic waste.Pollution in samples from the Beijing-Hangzhou Grand Canal originated from diesel engines.There were no obvious sources of pollution for the other water samples.These results can be used as reference levels for future monitoring programs of pollution from PAHs and PAEs.

Distribution and sources of polycyclic aromatic hydrocarbons and phthalic acid esters in water and surface sediment from the Three Gorges Reservoir

After the impoundment of the Three Gorges Reservoir（TGR）, the hydrological situation of the reservoir has changed greatly. The concentration and distribution of typical persistent organic pollutants in water and sediment have also changed accordingly. In this study, the concentration, distribution and potential sources of 16 polycyclic aromatic hydrocarbons（PAHs） and 6 phthalic acid esters（PAEs） during the water drawdown and impoundment periods were investigated in water and sediment from the TGR. According to our results, PAHs and PAEs showed temporal and spatial variations. The mean ΣPAH and ΣPAE concentrations in water and sediment were both higher during the water impoundment period than during the water drawdown period. The water samples from the main stream showed larger ΣPAH concentration fluctuations than those from tributaries. Both the PAH and PAE concentrations meet the Chinese national water environmental quality standard（GB 3838-2002）. PAH monomers with 2–3 rings and 4 rings were dominant in water, and 4-ring and 5–6-ring PAHs were dominant in sediment. Di-n-butyl phthalate（DBP） and di-2-ethylhexyl phthalate（DEHP）were the dominant PAE pollutants in the TGR. DBP and DEHP had the highest concentrations in water and sediment, respectively. The main source of PAHs in water from the TGR was petroleum and emissions from coal and biomass combustion, whereas the main sources of PAHs in sediments included coal and biomass combustion, petroleum, and petroleum combustion. The main source of PAEs in water was domestic waste, and the plastics and heavy chemical industries were the main sources of PAEs in sediment.

Abiotic association of phthalic acid esters with humic acid of a sludge landfill

The abiotic association between phthalic acid esters （PAEs） and humic substances （HS） in sludge landfill plays an important role in the fate and stability of PAEs. An equilibrium dialysis combined with 14C-labeling was used to study the abiotic association of two abundant PAEs （diethyl phthalate and di-n-butyl phthalate） with humic acid （HA） isolated from a sludge landfill with different stabilization times and different molecular weights. Ele- mental analysis and Fourier Transform Infrared Spectro- photometer （FTIR） suggested that high KA value of HA was related to the high aromatic content and large molecular weight of HA. The results indicated that the association strength of PAEs with HA depended on both the properties of the PAEs and the characteristics of HA. The KA values of the association were strongly dependent on solution pH, and decreased dramatically as the pH was increased from 3.0 to 9.0. The results suggested that non- specific hydrophobic interaction between PAEs and HA was the main contributor to the association of the PAEs with HA. The interactive hydrogen-bonds between the HA and the PAEs molecules may also be involved in the association.

Zirconium-mediated Synthesis and Crystal Structure of 3,6-Diiodo-4,5-dialkyl-phthalic Acid Dimethyl Ester

A novel series of para-diiodobenzene derivatives, 3,6-diiodo-4,5-dialkyl-phthalic acid dimethyl esters, were prepared via cycloaddition of two TMS-substituted alkynes and dimethyl acetylenedicarboxylate, which was mediated by zirconocene. After iodination, three new compounds of 3,6-diiodo-4,5-dimethyl（dipropyl, dibutyl）-phthalic acid dimethyl esters （3a, 3b, 3c） were synthesized in high region-selectivity and yields, and characterized by NMR. The crystal structures were determined by single-crystal X-ray diffraction. The crystal of 3a （C12H121204, Mr = 474.02） belongs to the triclinic system, space group Pi with a = 7.6238（10）, b = 9.4571（12）, c = 10.8221（14） A, a = 66.611（10）, fl = 88.511（12）, 7 ： 77.604（11）% V= 697.93（16） A3, Z= 2, F（000） = 444, Dc = 2.256 mg/m3, g = 4.509 mm-1, T=133（2） K, S = 1.014, R = 0.0229 and wR = 0.0547 for 2644 observed reflections with I 〉 20（/）; the crystal of 3b （C16H201204, Mr - 530.12） is of triclinic system, space group Pi with a = 9.4122（19）, b = 10.626（2）, c = 11.353（2） A, a = 97.90（3）, fl = 113.83（3）, y = 110.22（3）°, V= 922.6（3） A3, Z- 2, F（000） = 508, Dc - 1.908 mg/m3, g = 3.422 mm-1, T = 113（2） K, S = 1.115, R = 0.0428 and wR = 0.1072 for 3971 observed reflections with I〉 20（/）; the crystal of 3c （ClsH241204, Mr = 558.17） belongs to the monoclinic system, space group P21/c with a = 26.396（2）, b = 8.7560（8）, c = 25.7970（18） A, fl = 91.721（4）o, V= 5959.6（8） A3, Z = 12, F（000） = 3240, Dc = 1.866 mg/m3,/z = 3.184 mm-l, T= 113（2） K, S = 1.154, R = 0.0424 and wR = 0.0766 for 13056 observed reflections with I 〉 20（/）.

Ultrasonic wave extraction and simultaneous analysis of polycyclic aromatic hydrocarbons (PAHs) and phthalic esters in soil

A method is developed for detection of polycyclic aromatic hydrocarbons(PAHs) and Phthalic Acid Esters(PAEs) in soil samples. Ultrasonic Wave Extraction under airtight circumstances is adopted to extract the analytes in soil samples with n-hexane–acetone(V:V=1:1) as extraction solvent. This method has several advantages, including high extraction efficiency, short time, convenience and simplicity. It can be used to detect polycyclic aromatic hydrocarbons(PAHs) and Phthalic Acid Esters(PAEs) in soil.

邻苯二甲酸酯降解功能内生菌群的筛选及定殖效能

为降低邻苯二甲酸酯(PAEs)污染作物对人体健康的威胁,从PAEs污染蔬菜中富集驯化具有PAEs降解高效性和广谱性的功能内生菌群,解析菌群群落组成并优化其降解条件,借助水培体系研究了功能内生菌群在作物体内的定殖效能.高通量测序结果表明,从门的分类水平看,菌群主要由变形菌门(Proteobacteria,76.57%)、拟杆菌门(Bacteroidetes,21.04%)和放线菌门(Actinobacteria,2.37%)组成;从属的分类水平看,菌群主要由鞘氨醇杆菌属(Sphingobacterium,33.03%)、代尔夫特菌属(Delftia,40.61%)、假单胞菌属(Pseudomonas,11.70%)、无色杆菌属(Achromobacter,3.04%)和根瘤菌属(Rhizobium,6.90%)组成.在无机盐纯培养体系中,该菌群在7d内对5mg/L的邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二丁酯(DBP)和邻苯二甲酸丁基苄基酯(BBP)降解率分别为97.08%、94.47%、98.02%和44.82%.单因素试验结果表明,菌群降解PAEs的最佳条件为:pH值7、25℃、盐度1%、底物浓度5mg/L.水稻水培试验表明,菌群可以定殖到水稻体内并有效促进PAEs的去除,与对照组相比,处理15d后水稻体内DMP、DEP、DBP和∑PAEs含量分别降低了41.09%、45.33%、63.06%和32.3%.菌群的定殖还能够提高水稻根长、株高和生物量,促进水稻的生长.该菌群在降低作物PAEs积累、保障PAEs污染地区农产品质量安全方面具有良好的应用前景,能有效降低作物PAEs污染对人体健康的威胁.

再生水受纳湖泊中邻苯二甲酸酯的生态风险时空分布及管控建议

本研究以再生水受纳湖泊J湖为研究对象,基于多介质归趋模型对湖泊水相和沉积相中邻苯二甲酸酯(phthalic acid esters,PAEs)进行不同时空生态风险评估。结果显示,水相和沉积相中邻苯二甲酸二甲酯(dimethyl phthalate,DMP)和邻苯二甲酸二乙酯(diethyl phthalate,DEP)的危险商(hazard quotient,HQ)均小于0.1,对湖泊水生生物的风险水平为无风险;湖泊中的邻苯二甲酸二丁酯(dibutyl phthalate,DBP)和邻苯二甲酸二(2-乙基己)酯(di-(2-ethylhexyl)phthalate,DEHP)生态风险表现出显著的空间异质性,水相中,DBP低风险区占42.7%,DEHP中风险、低风险区分别占93.5%、5.6%;在沉积相中,DBP中风险、低风险区分别占0.5%、69.2%,DEHP中风险、低风险区分别占0.9%、68.3%。不同季节中,湖泊水相DEP、DBP和DEHP的生态风险差异较大,沉积物中PAEs的生态风险随季节变化与水相相似。最后,建议降低再生水中DBP和DEHP的浓度并从源头管控降低DEHP的生产和使用,可以有效降低受纳湖泊中DBP和DEHP的风险水平。

孕妇血清邻苯二甲酸酯浓度与妊娠期糖尿病之间的关系

邻苯二甲酸酯(PAEs)广泛暴露于人体,对孕妇有许多不利影响.迄今为止,已发表了许多关于PAE对妊娠期糖尿病(GDM)风险影响的研究,但这些研究的结果存在争议.本研究共采集了2011年至2012年158例孕妇血清样本(包括104名GDM孕妇和54名未患GDM孕妇),利用气相色谱-质谱(GC-MS)测量了血清中16种PAEs的浓度,并研究了血清中PAEs浓度与孕妇患GDM风险和血糖水平之间的关系.结果表明,邻苯二甲酸二(2-乙基)己酯(DEHP,平均值为32.95 ng·mL^(-1))是孕妇血清中浓度最高的PAEs,其次是邻苯二甲酸二丁酯(DBP,平均值为20.55 ng·mL^(-1))和邻苯二甲酸丁基苄基酯(BBP,平均值为9.89 ng·mL^(-1)).Logistic回归分析结果指出,孕妇血清中的邻苯二甲酸二甲酯(DMP,odds ratio(OR)=2.39,95%置信区间(CI):1.14,3.85),DBP(OR=3.54,95%CI:1.25,5.70),邻苯二甲酸二异丁酯(DIBP,OR=2.32,95%CI:1.78,4.14)和DEHP(OR=4.19,95%CI:2.89,5.99)浓度与GDM发病率呈显著正相关.此外,孕妇的血清中DBP、DIBP和DEHP浓度与2 h血糖呈正相关(未调整模型:β_(DBP)=0.13,95%CI:0.09,0.42,P<0.05;β_(DIBP)=0.19,95%CI:0.04,0.65,P<0.05;β_(DEHP)=0.32,95%CI:0.10,0.53,P<0.05.调整后模型:β_(DBP)=0.12,95%CI:0.07,0.38,P<0.05;β_(DIBP)=0.25,95%CI:0.10,0.69,P<;0.05;β_(DEHP)=0.38,95%CI:0.15,0.58,P<0.05).总结而言,暴露于DBP、DIBP、DMP和DEHP可能会增加孕妇患GDM的风险.

基质固相分散辅助加速溶剂萃取-气相色谱-质谱法测定道路扬尘中9种邻苯二甲酸酯的含量

道路扬尘样品成分复杂且没有相应的标准检测方法,基于将加速溶剂萃取(ASE)与基质固相分散(MSPD)相结合,提出了题示方法。取10.0 g道路扬尘样品与10.0 g弗罗里硅土搅拌均匀,装入萃取池(预先加入一层厚度约0.5 cm的硅藻土),用体积比1\:1的正己烷-二氯甲烷混合液于100℃萃取2次。将萃取液浓缩至5.0 mL左右,氮吹至1.0 mL左右,用正己烷定容至1.0 mL,采用气相色谱-质谱法测定其中邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二丙酯(DPRP)、邻苯二甲酸二异丁酯(DIBP)、邻苯二甲酸二丁酯(DBP)、邻苯二甲酸苄基丁基酯(BBP)、邻苯二甲酸二环己酯(DCHP)、邻苯二甲酸(2-乙基己基)酯(DEHP)和邻苯二甲酸正辛酯(DNOP)等9种邻苯二甲酸酯(PAEs)的含量。结果表明,9种PAEs标准曲线的线性范围均为0.1~5.0 mg·L^(-1),检出限(3.143 s)为1.10~1.39μg·kg^(-1)。按照标准加入法进行回收试验,回收率为76.6%~107%,测定值的相对标准偏差(n=6)小于10%。方法用于实际样品分析,DIBP、DBP和DEHP的检出量较高,依次为8.06~233μg·kg^(-1),23.9~3148μg·kg^(-1),16.5~4106μg·kg^(-1)。

液液萃取气相色谱-串联质谱法测定含油半固体食品中19种邻苯二甲酸酯类化合物

建立液液萃取结合气相色谱-串联质谱法测定含油半固体食品中19种邻苯二甲酸酯类化合物含量。样品经正己烷饱和的乙腈提取,提取液与乙腈饱和的正己烷液液萃取净化,采用HP-5MS色谱柱分离,多反应监测模式定量分析。19种邻苯二甲酸酯类化合物的质量浓度在20~1000μg/L范围内线性相关系数均大于0.9993,方法检出限为0.0012~0.060 mg/kg,定量限为0.0036~0.18 mg/kg,0.2、1.0、7.5 mg/kg低、中、高三水平加标试验的平均回收率为81.2%~100.7%,测定结果的相对标准偏差为0.9%~5.7%(n=6)。该方法适用于含油半固体食品中19种邻苯二甲酸酯类化合物的定量分析。

吐鲁番设施菜地土壤和蔬菜中邻苯二甲酸酯污染特征及健康风险评价

【目的】明确吐鲁番区域设施菜地土壤和蔬菜中PAEs的含量水平及健康风险。【方法】采集吐鲁番市设施蔬菜基地土壤和蔬菜样品各27个,使用气相色谱-质谱联用检测方法检测了土壤和蔬菜中16种PAEs的含量,采用美国环保署推荐的评估模型对检出的PAEs进行了人体暴露健康风险评价。【结果】土壤中检出了5种PAEs,分别为DMP、DEP、DBP、DEHP、DIBP,检出率为100%,∑PAEs在7.66~71.80μg/kg,平均值为26.57μg/kg。其中DIBP、DBP和DEHP分别占总量的60.9%、18.8%和17.8%。蔬菜中检出了DMP、DEP、DIBP、DBP、DEHP、BBP、DCHP 7种PAEs,∑PAEs在41.12~807.63μg/kg,平均值为237.98μg/kg,其中DIBP、DEHP和DBP三者占总量的91.8%。蔬菜与土壤样品中∑PAEs、DMP、DEP、DIBP、DEHP的含量具有显著相关性,相关系数分别为0.524、0.724、0.4982、0.5022、0.4562。PAEs单体的非致癌风险值(HQ)均小于1,DEHP和BBP的致癌风险值(CR)小于EPA推荐的致癌风险水平(CR>10-6)。【结论】吐鲁番设施菜地土壤和蔬菜中PAEs的非致癌风险和致癌风险均在可接受的范围内,对人体无健康危害。

GC-MS测定食品包装材料中邻苯二甲酸酯类迁移量

本文探究了气相色谱-质谱法(GC-MS)测定PE材质食品包装材料中邻苯二甲酸脂类(PAEs)的迁移量。选用4%乙酸体系和4%乙醇体系对试样进行前处理,用正己烷进行液液超声萃取,采用有证标准物质完成标准曲线的绘制并进行质量控制。结果显示,各标准曲线均呈良好线性关系。方法检出限在0.002~0.012mg·dm^(-2)范围内,加标回收率为91.2%~113%,精密度(RSD%)在0.9%~4.1%之间。该方法检出限较低、精密度和准确度较高,操作简便,可应用于PE等塑料材质食品包装材料中邻苯二甲酸酯类化合物迁移量的快速测定。

水环境中邻苯二甲酸酯类化合物分析方法研究进展

邻苯二甲酸酯类化合物(PAEs)是常见的增塑剂,已成为最普遍的环境污染物,对人类的生活和健康构成了严重的威胁。本文综述了水环境中PAEs的前处理方法和检测技术。常见的前处理方法有液-液萃取法、固相萃取法、固相微萃取法和液相微萃取等。目前应用较为广泛的检测技术主要有气相色谱法、气相色谱-质谱法、液相色谱法、液相色谱-串联质谱法等。PAEs的分析检测已经取得了初步成果,快速、高效、便捷、高通量的前处理和检测方法仍然是未来研究的方向。

溶剂萃取-气相色谱-三重四极杆串联质谱法测定水体和土壤中6种邻苯二甲酸酯

采用溶剂萃取分离法提取水体和土壤中的邻苯二甲酸酯(PAEs),优化了提取剂及提取步骤,建立了简便、快速、高通量测定水体和土壤样本中6种PAEs的气相色谱-三重四极杆串联质谱法(GC-MS/MS)。结果表明,水样和土样的最佳萃取剂分别为正己烷和乙腈,提取容器和涡旋时间是影响PAEs回收率的关键因素,离心温度、超声时间、提取次数和氮吹等步骤对PAEs回收率影响较小。在最优条件下,在0.5~100μg/L范围内6种PAEs的峰面积与浓度线性关系良好(相关系数R^(2)>0.9926)。选取了1种河水和2种土壤基质,分别在3个加标水平和2个加标水平下验证了提取方法的准确度和精密度,6种PAEs在水体和土壤中的平均回收率分别为85.6%~112.5%和94.3%~114.3%,相对标准偏差均小于10%。方法适用于水体和土壤等环境样本中PAEs残留的监测。

一株植物内生枯草芽孢杆菌对6种邻苯二甲酸酯的共代谢降解

从邻苯二甲酸酯(PAEs)污染的青菜(Brassica rapa var.chinensis)中筛选获得1株编号为W34的内生菌。通过生理生化特征和16S rRNA基因测序对该菌进行鉴定,并研究W34对6种PAEs的共代谢降解特性,优化共代谢降解条件,初步探索共代谢基质对W34降解代谢PAEs的影响。结果表明,内生菌W34为枯草芽孢杆菌(Bacillus subtilis),该菌能以6种PAEs为碳源生长,可同时降解邻苯二甲酸二正丁酯(DBP)、邻苯二甲酸丁基苄基酯(BBP)、邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二(2-乙基)己酯(DEHP)和邻苯二甲酸二正辛酯(DnOP)6种PAEs。其中,该菌对DBP和BBP的降解能力较强,20 mg/L质量浓度下DBP和BBP的降解半衰期均小于0.33 d。添加D-纤维二糖为共代谢基质,W34对DMP、DEP、DEHP和DnOP的降解率均显著提升。吐温-80添加量、碳源种类、碳源质量浓度和接菌量对这4种PAEs的降解率均有显著影响。通过单因素试验,得到该菌的吐温-80最佳添加量为0.025%,最佳碳源为蔗糖(浓度为20 mmol/L),最佳接种菌液OD_(600)为0.3。此外,发现菌株W34含有质粒,但其质粒上不含PAEs降解基因,该菌的PAEs降解基因位于细菌的染色体上。菌株W34的粗酶液对6种PAEs均有催化降解活性,蔗糖可显著提高菌株W34胞内酶的催化活性。

气相色谱串联质谱法测定市售白酒中18种邻苯二甲酸酯类塑化剂

为建立气相色谱串联质谱法测定白酒中18种邻苯二甲酸酯类化合物含量,样品经涡旋、离心、正己烷提取等前处理后,采用MEGA-5色谱柱分离、多离子监测扫描模式(MRM),以碎片丰度比定性,外标法定量,测定白酒中的18种邻苯二甲酸酯类化合物含量。结果表明,该方法在给定标准溶液浓度范围内峰面积与浓度呈良好线性关系,相关系数在0.9940~0.9998之间,其中邻苯二甲酸二壬酯(DINP)的检出限为3.0 mg/kg,其余17种邻苯二甲酸酯类的检出限为0.1~0.2 mg/kg,平均回收率为70%~130%之间,相对标准偏差均小于10%。对36件样品进行检测,检出1种或几种邻苯二甲酸酯,邻苯二甲酸二正丁酯(DBP)检出率最高,检出率为47.2%。该方法具有灵敏度高、重复性好、检测速度快的优点,可用于白酒中邻苯二甲酸酯类的检测。