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1.
吹扫捕集-GC法检测卷烟包装材料中挥发性有机化合物   总被引:5,自引:0,他引:5  
采用吹扫捕集-气相色谱联用法测定了7种卷烟包装材料样品中的18种挥发性有机物(VOCs)的残留量.结果表明:①方法的检出限0.02~1.42 ng/cm2;平均回收率为91.32%~99.37%;RSD在0.17%~2.74%之间;②所有样品中均未检出苯;③采用DB-WAXETR色谱柱能将间二甲苯和对二甲苯分离并准确定量;④条形包装纸样品中所含的VOCs成分较多,且含量较大,含量较高的是乙酸丙酯和乙酸正丁酯;盒包装纸的VOCs残留量较少.  相似文献   

2.
李绚 《食品工业》2015,(2):259-263
利用顶空-气相色谱/质谱法同时测定食品包装用纸中17种挥发性有机物残留量。试验显示:17种挥发性有机物(乙醇、异丙醇、正丁醇、丙酮、丁酮、己醛乙酸乙酯、乙酸异丙酯、乙酸丁酯、丙二醇甲醚、乙酸正丙酯、苯、甲苯、间二甲苯、对二甲苯、苯乙烯、邻二甲苯、乙酸乙酯)均可高效分离;各组分标准曲线的相关系数R2均大于0.999 5,加标回收率在87.1%~103.8%之间,相对标准偏差(RSD)均不大于5.6%(n=6),检出限均低于0.01mg/m2。该法具有前处理简单,分离效果好,回收率和精密度高等优点,能够满足食品包装用纸中挥发性有机物检测要求。  相似文献   

3.
烟用水基型乳胶中苯系物的GC/MS/SIM测定   总被引:2,自引:0,他引:2  
为了测定烟用水基型乳胶中的苯系物,分别用乙酸甲酯、乙酸乙酯、乙酸丁酯、丙二醇一甲醚、乙二醇一甲醚、N,N-二甲基甲酰胺、二甲亚砜、正己烷、环戊烷、丙酮、环己酮进行了溶解烟用水基型乳胶试验,并采用气相色谱/质谱/选择离子监测法测定了13种烟用水基型白乳胶中的苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯.结果表明:①二甲亚砜是烟用水基型白乳胶的适宜溶剂;②方法的回收率为96%~103%,RSD为4.65%~7.27%,定量限为0.06~0.09μg/g;③所测烟用水基型白乳胶样品中7种苯系物的总含量为0.73~7.94μg/g,苯、甲苯+二甲苯含量分别为0.29~4.86和0.12~5.76 μg/g.  相似文献   

4.
建立了顶空-气质联用(HS-GC/MS)法,对烟用接装纸中挥发性有机化合物(VOCs)残留量进行测试.结果表明:(1)该方法检测限为0.001-0.004 mg/mL,回收率为89.35%- 108.96%,相对标准偏差(RSD)<4%;(2)所有52个被检烟用接装纸榉品均为合格样品,所有样品中均未检出苯、乙苯、二甲苯、乙酸异丙酯、丁酮,YC171-2009《烟用接装纸》标准中规定的5种VOCs成分中只有乙酸正丁酯有个别检出;(3)醇类检出率较高,其中所有样品都有乙醇检出,异丙醇、正丁醇的检出率也比较高;(4)丙二醇甲醚有较高的检出率,且其检出量相对较大.研究结果充分说明,该方法适合于烟用接装纸中VOCs的快速批量检测.  相似文献   

5.
通过顶空-气相色谱法分析牙刷包装背卡中五种苯类溶剂残留(苯、甲苯、邻二甲苯、间二甲苯、对二甲苯)。结果表明,该方法对5种苯类溶剂残留的加标回收率为83.7%-98.9%,相对标准偏差为0.75%-4.08%,检测限为0.004-0.006 mg·m-2。本文所建立的方法样品处理简单,样品处理过程中未使用有机溶剂,提取效果好,重现性好,灵敏度高,检测限能满足检验需要,适合牙刷包装背卡中苯类溶剂残留含量的测定。  相似文献   

6.
顶空气相色谱法测定卷烟包装材料中的溶剂残留   总被引:7,自引:1,他引:6  
采用顶空气相色谱法对卷烟包装材料中残留溶剂(乙酸乙酯、乙酸丁酯、甲苯、乙苯等)进行分析,并讨论了各种条件对测定的影响.分析结果表明,该方法对4种残留溶剂的线性范围分别为乙酸乙酯0.4~120 mg/L,甲苯0.4~120 mg/L,乙酸丁酯1.2~600mg/L,乙苯0.5~150 mg/L,测定结果的相对标准偏差为2.6%~3.1%,样品的回收率为90%~95%;方法简便、快速、重现性好,该方法可用于一些卷烟包装材料中溶剂残留的分析.  相似文献   

7.
目的 建立了顶空-气相色谱法测定保健食品原料越橘提取物中正己烷、乙醇、苯、甲苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯、1,2-二乙基苯和二乙烯苯10种溶剂残留含量的分析方法。方法 采用HP-FFAP毛细管柱(60 m×0.32 mm, 1.0 μm),氢火焰离子化检测器(flame ionization detector, FID),程序升温,顶空进样器的平衡时间为30 min,平衡温度为95 ℃,分流比为5:1 (V:V)。结果 10种溶剂分离效果良好,正己烷、乙醇、苯、甲苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯、1,2-二乙基苯和二乙烯苯在其各自对应的浓度范围内线性关系良好(r≥0.9988);方法检出限(limits of detection, LODs)为0.02~1.07 mg/kg;3个添加水平下,平均回收率为92.7%~116.4%,相对标准偏差在0.2%~5.1% (n=3)之间。结论 该方法简便快速、结果可靠;可用于保健食品原料越橘提取物的溶剂残留量的测定。  相似文献   

8.
为分析不同透气度的卷烟接装纸对卷烟烟气成分和卷烟燃烧温度的影响,对不同透气度接装纸的卷烟进行烟气分析,并采用红外热像仪测定了不同透气度接装纸卷烟的燃烧温度。结果表明,随着接装纸透气度的增大,卷烟主流烟气中的焦油量、CO释放量、烟气烟碱量均显著线性下降,而抽吸口数增加;与采用透气度为0的接装纸相比,采用透气度为500 CU的接装纸后,其卷烟的主流烟气中焦油量降低50.6%,CO释放量降低64.6%,烟气烟碱量降低42.9%,抽吸口数增加22.5%;接装纸透气度对卷烟抽吸燃烧温度影响显著,随着接装纸透气度的增大,卷烟第三口抽吸温度和峰值平均值均明显下降;接装纸透气度从100 CU增加到500 CU,卷烟第三口抽吸温度下降了115℃,峰值平均值下降了87℃,而阴燃平均温度未发生明显变化,此外,阴燃平均温度明显低于第三口抽吸温度和峰值平均值。  相似文献   

9.
顶空-气相色谱法测定烟用接装纸中乙酸丁酯的不确定度   总被引:3,自引:0,他引:3  
为提高测量结果的准确性,依据JJF 1059.1—2012《测量不确定度评定与表示》,建立相关数学模型,分析了顶空-气相色谱法测定接装纸中乙酸丁酯含量的不确定度,并计算了影响测量的各个不确定度分量。结果表明:1影响测量不确定度的因素有试样制备、标准工作溶液制备、重复性考察、标准工作曲线拟合等,其中拟合标准工作曲线所引入的不确定度最大;2当接装纸样品中乙酸丁酯残留量为0.54 mg/m2时,其合成不确定度为0.024 mg/m2,扩展不确定度为0.05 mg/m2(P=95%,k=2)。通过改变标准工作曲线逐级稀释制备方法和减小标准工作溶液浓度范围可进一步提高分析的精准度。  相似文献   

10.
顶空-气相色谱法测定塑料食品包装袋中6种苯系物残留量   总被引:3,自引:0,他引:3  
采用顶空-气相色谱法对食品塑料包装材料中可能残留的苯系物(苯、甲苯、邻二甲苯、间二甲苯、对二甲苯、异丙苯)进行分析。方法采用FFAP色谱柱分离,氢火焰离子化检测器FID检测,6种苯系物能够完全分离,线性较好,方法的检出限可达2.67μg/m2,7次测定相对标准偏差在0.89%~1.95%,样品加标回收率苯系物介于64.6%~97.1%。测定了10种塑料包装材料中的苯系物残留量,方法简便、快速、重现性好,完全能满足塑料包装材料中苯系物残留量的分析。  相似文献   

11.
利用热脱附/GC-MS联用技术分析测试了居民室内环境、家具产品及家具厂库房中有毒有害挥发性有机化合物(VOCs)。结果表明,无论是居民室内环境、家具厂库房,还是家具产品中,检出物种类相对集中,TVOC平均浓度值均超过有关标准的限量值,检出率最高的是苯、甲苯、苯乙烯、对间二甲苯、邻二甲苯、三甲苯、二氯苯等苯系物;其次是酯类化合物,包括乙酸乙酯、乙酸正丁酯;另外,还有少量的烷、烯、酮类挥发性有机物。家具产品对室内空气污染的贡献率非常高,是引起室内环境污染的主要原因之一,家具中有害物质种类分布及浓度相对集中,主要集中在低分子(≤C10)范围内,应重点控制。  相似文献   

12.
卷烟商标残留成分的顶空-GC/MS分析   总被引:1,自引:0,他引:1  
为降低商标材料残留的油墨溶剂成分对卷烟的污染,采用顶空-气相色谱/质谱法分析了12种卷烟商标纸的残留成分。结果表明:①烟标中残留乙醇、异丙醇、丁醇、乙酸乙酯、乙酸丙酯、乙酸丁酯、环己酮、1-甲氧基-2-丙醇和2-乙氧基-1-乙醇等成分;②部分烟标的溶剂残留量超过30mg/m2。  相似文献   

13.
A novel method was developed for analyzing benzene series (benzene, toluene, ethylbenzene, xylene, and styrene; abbreviate as BTEXS) in fish sample by gas chromatography–mass spectroscopy (GC-MS), which was simplified the sample pretreatment process using matrix removal method by aqueous two-phase system (ATPS) of acetonitrile-K2HPO4-H2O. The interaction of protein with BTEXS was investigated via the equilibrium dialysis coupled with GC-MS. The results of equilibrium dialysis indicated that the combination among BTEXS and protein was very strong. In suitable concentration of acetonitrile aqueous solution, a slow but full protein denaturation takes place, which causes the unfolding of protein and the release of BTEXS. Then, the BTEXS were extracted into upper phase of ATPS of acetonitrile-K2HPO4-H2O with high extraction efficiencies. This method has been applied to the determination of seven benzene series (benzene, toluene, ethylbenzene, m-xylene, p-xylene, o-xylene, and styrene) residues in the fish sample. The detection limits were in the range of 1.1?~?4.3 ng/g, and the spiked recoveries were 81.4?~?97.8 %, with RSD 1.3?~?5.1 %.  相似文献   

14.
在参考大量文献的基础上,建立主要污染物危害性评价数学模型,结合主客观评价方法,研究利用模糊数学中的模糊变换来综合评价我国家具典型污染物的水平,并将该方法成功应用于甲醛、苯、TVOCs(以甲苯计)、4-氨基偶氮苯、苯并[α]芘、五溴二苯醚、邻苯二甲酸酯(DEPH)、五氯苯酚、狄氏剂、有机锡(三丁基锡)、铅、乙酸丁酯、氡、大肠杆菌等14种典型污染物的综合评价,得出这些污染物水平的排序。  相似文献   

15.
利用顶空气相色谱-离子迁移谱(headspace-gas chromatography-ion mobility spectrometer,HS-GC-IMS)对8种咖啡样品烘焙前后挥发性有机物成分(volatile organic compounds,VOCs)进行分析。鉴定出42个VOCs,包含9个醇类、9个醛类、9个酯类、7个酮类、3个酸类、2个呋喃类、2个醚类、1个吡嗪类。咖啡烘焙后总VOCs比烘焙前增加180.47%,其中呋喃类增加2 200%,吡嗪类增加532.39%,酮类增加82.03%,醚类降低45.23%,醇类降低32.35%,酯类降低18.52%,醛类降低17.32%,挥发性酸类降低15.55%。烘焙后咖啡中糠醇、γ-丁内酯、2-乙酰基呋喃等化合物大量增加,而乙醇、二甲基硫醚、乙酸丙酯、乙酸丁酯等化合物减少,使烘焙后的咖啡表现出复杂的气味。  相似文献   

16.
Naphtha, comprising low molecular weight aliphatics and aromatics (C3-C14), is used as a diluent in processing of bitumen from oil sands. A small fraction (<1%) is lost to tailings waste and incorporated into mature fine tailings (MFT). BTEX (benzene, toluene, ethylbenzene, and xylenes) and whole naphtha were assessed for biodegradation under methanogenic conditions using MFT from an oil sands tailings settling basin. MFT spiked with 0.05-0.1% w/v of BTEX compounds produced up to 2.1 (+/-0.1) mmol of methane during 36 weeks of incubation. Metabolism of 0.5-1.0% w/v naphtha in MFT yielded up to 5.7 (+/-0.2) mmol of methane during 46 weeks of incubation. Gas chromatographic analyses showed that BTEX degraded in the sequence: toluene > o-xylene > m- plus p-xylene > ethylbenzene > benzene. Only 15-23% of whole naphtha, mainly n-alkanes (in the sequence: nonane > octane > heptane) and some BTEX compounds (toluene > o-xylene > m-xylene), was metabolized. Other naphtha constituents, such as iso-paraffins and naphthenes, remained unchanged during this period. These results suggest that the microbial communities in the MFT can readily utilize certain fractions of unrecovered naphtha in oil sands tailings and support methanogenesis in settling basins. Current study findings could influence extraction process, MFT management, and reclamation options.  相似文献   

17.
A direct aqueous injection-gas chromatography/mass spectrometry (DAI-GC/MS) method for trace analysis of gasoline components in water is presented. The method allows for the simultaneous quantification of the following solutes: methyl tert-butyl ether (MTBE), its major degradation products (tert-butyl formate, tert-butyl alcohol (TBA), methyl acetate, and acetone), and possible substitutes of MTBE as an octane enhancer in gasoline (tert-amyl methyl ether, ethyl tert-butyl ether) as well as benzene, toluene, ethylbenzene, p-xylene, m-xylene, and o-xylene (BTEX). No enrichment or pretreatment steps are required, and sample volumes of only 50 microL are needed for analysis. The detection limits in two different matrixes (spiked lake water and contaminated groundwater) are < or = 2 microg/L for most analytes and < 0.2 microg/L for MTBE, benzene, and toluene. The accuracy of the DAI-GC/MS method was excellent as determined from comparison with headspace-GC/MS and purge-and-trap-GC/MS. The DAI-GC/MS method has been applied to various environmental studies, which demonstrated its versatility. The applications comprised both laboratory (MTBE degradation in water treatment, quantification of polar gasoline components) and field (MTBE degradation ata gasoline spill site) investigations.  相似文献   

18.
采用接触角测试比较了水溶性和溶剂型油墨印刷后接装纸表面润湿性能的差异,通过卷烟卷接实验,考察了不同类型接装纸的卷接适应性和卷接的卷烟质量,并运用飞行时间二次离子质谱仪(TOFSIMS)分析了影响卷烟质量和卷接效果的原因,结果表明:①水溶性油墨印刷的接装纸表面润湿性能优于溶剂型油墨印刷的接装纸;②溶剂型油墨印刷的接装纸接装适应性优于水溶性油墨印刷的接装纸,且在卷接成卷烟后,出现外观缺陷的卷烟比例明显低于水溶性油墨印刷的接装纸;③为提高水溶性油墨印刷的接装纸的卷接适应性,需增大印刷后接装纸表面的接触角或改善胶水性能,从而保证接装时接装纸表面有足够的胶水来满足粘接需求.  相似文献   

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