Determination of Ni2+ in Waters with Sodium Polyacrylate as a Binding Phase in Diffusive Gradi
化学化工英语试题及答案
化学化工英语试题及答案一、选择题（每题2分，共20分）1. Which of the following is a chemical element?A. WaterB. OxygenC. HydrogenD. Carbon答案：B, C, D2. The chemical formula for table salt is:A. NaOHB. NaClC. HClD. NaHCO3答案：B3. What is the process called when a substance changes from a solid to a liquid?A. SublimationB. VaporizationC. MeltingD. Condensation答案：C4. In the periodic table, which group contains alkali metals?A. Group 1B. Group 2C. Group 17D. Group 18答案：A5. What is the name of the process where a substance decomposes into two or more substances due to heat?A. CombustionB. OxidationC. ReductionD. Decomposition答案：D6. Which of the following is a physical property of a substance?A. ColorB. TasteC. SolubilityD. Reactivity答案：A7. What is the term for a compound that releases hydrogen ions (H+) when dissolved in water?A. BaseB. AcidC. SaltD. Neutral答案：B8. The law of conservation of mass states that in a chemical reaction:A. Mass is lostB. Mass is gainedC. Mass remains constantD. Mass can be converted into energy答案：C9. Which of the following is a type of chemical bond?A. Ionic bondB. Covalent bondC. Hydrogen bondD. All of the above答案：D10. What is the name of the process where a substance absorbs energy and changes from a liquid to a gas?A. MeltingB. VaporizationC. SublimationD. Condensation答案：B二、填空题（每题2分，共20分）1. The symbol for the element iron is ________.答案：Fe2. The pH scale ranges from ________ to ________.答案：0 to 143. A compound that produces a basic solution when dissolvedin water is called a ________.答案：base4. The smallest particle of an element that retains its chemical properties is called a ________.答案：atom5. The process of separating a mixture into its individual components is known as ________.答案：separation6. The study of the composition, structure, and properties of matter is called ________.答案：chemistry7. The process of a substance changing from a gas to a liquid is called ________.答案：condensation8. A(n) ________ reaction is a type of chemical reactionwhere two or more substances combine to form a single product. 答案：synthesis9. The volume of a gas at constant temperature and pressureis directly proportional to the number of ________.答案：moles10. The process of converting a solid directly into a gas without passing through the liquid phase is known as ________. 答案：sublimation三、简答题（每题10分，共30分）1. Explain what is meant by the term "stoichiometry" in chemistry.答案：Stoichiometry is the calculation of the relative quantities of reactants and products in a chemical reaction.It is based on the law of conservation of mass and involvesthe use of balanced chemical equations and the molar massesof substances to determine the amounts of reactants needed to produce a certain amount of product or the amounts ofproducts formed from a given amount of reactant.2. Describe the difference between a physical change and a chemical change.答案：A physical change is a change in the state or form of a substance without altering its chemical composition. Examples include melting, freezing, and boiling. A chemical change, on the other hand, involves a change in the chemical composition of a substance, resulting in the formation of new substances. Examples include combustion and rusting.3. What are the three main types of chemical bonds, and givean example of each.答案：The three main types of chemical bonds are ionic bonds, covalent bonds, and metallic bonds. An ionic bond is formed when electrons are transferred from one atom to another, resulting in the formation of oppositely charged ions. An example is the bond between sodium (Na) and chloride (Cl) in table salt (NaCl). A covalent bond is formed when two atoms share electrons, as seen in water (H2O) where hydrogen atoms share electrons with oxygen. Metallic bonds occur in metals, where a "sea" of delocalized electrons is shared among positively charged metal ions, as in sodium metal。
化学英语考试题及答案
化学英语考试题及答案一、选择题（每题2分，共20分）1. What is the chemical symbol for oxygen?A. OB. OHC. H2OD. O22. Which of the following is not a basic unit of a chemical element?A. AtomB. MoleculeC. ProtonD. Electron3. What is the law of conservation of mass?A. Mass is neither created nor destroyed in a chemical reaction.B. Mass is always created in a chemical reaction.C. Mass is always destroyed in a chemical reaction.D. None of the above.4. What is the correct chemical formula for water?A. H2OB. H2O2C. O2HD. OH-5. Which of the following is a noble gas?A. Oxygen (O)B. Helium (He)C. Carbon (C)D. Nitrogen (N)6. What is the valency of hydrogen in the compound HCl?A. +1B. -1C. +2D. -27. Which of the following is a compound?A. Oxygen gas (O2)B. Carbon dioxide (CO2)C. Hydrogen gas (H2)D. Nitrogen gas (N2)8. What is the common name for the chemical NaCl?A. SodiumB. ChlorineC. Table saltD. Baking soda9. What is the atomic number of carbon?A. 6B. 16C. 12D. 810. What is the process of a substance changing from a solidto a liquid state called?A. SublimationB. VaporizationC. MeltingD. Condensation二、填空题（每空1分，共10分）11. The chemical equation for the combustion of methane is__________.Answer: CH4 + 2O2 → CO2 + 2H2O12. The symbol for the element with atomic number 17 is__________.Answer: Cl13. The process of a substance changing from a liquid to agas is known as __________.Answer: Vaporization14. The chemical formula for calcium carbonate is __________. Answer: CaCO315. The valency of chlorine in the compound KCl is __________. Answer: -116. The noble gas that is used in balloons is __________.Answer: Helium (He)17. The atomic number of oxygen is __________.Answer: 818. The process of a substance changing from a gas to aliquid is known as __________.Answer: Condensation19. The chemical symbol for the element with the highest atomic mass is __________.Answer: Og (Oganesson)20. The law that states the total mass of the reactants equals the total mass of the products in a chemical reaction is known as the __________.Answer: Law of Conservation of Mass三、简答题（每题5分，共20分）21. Explain the difference between a pure substance and a mixture.Answer: A pure substance consists of a single type of particle, while a mixture is composed of two or moredifferent substances that are not chemically combined.22. What is an acid and what are its properties?Answer: An acid is a substance that donates hydrogen ions (H+) when dissolved in water. Properties of acids include a sour taste, the ability to change the color of certain indicators, and the ability to react with bases to form salts and water.23. Describe the process of photosynthesis.Answer: Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll pigments. It involves theconversion of carbon dioxide and water into glucose and oxygen in the presence of light energy.24. What is a chemical equilibrium and how is it represented? Answer: Chemical equilibrium is the state in a reversible reaction where the rate of the forward reaction equals the rate of the reverse reaction, resulting in no net change in the concentrations of reactants and products. It is represented by the equilibrium constant expression, Kc, which is the ratio of the concentrations of products to reactants raised to their respective stoichiometric coefficients.四、计算题（每题5分，共10分）25. If 10 grams of sodium bicarbonate (NaHCO3) are dissolved in water and reacted with an excess of hydrochloric acid (HCl), calculate the volume。
QuEChERS-_超高效液相色谱-_串联质谱法测定蜂蜜中19_种喹诺酮类抗生素
QuEChERS－超高效液相色谱－串联质谱法测定蜂蜜中１９种喹诺酮类抗生素倪杨 杨军军 石磊 张莹莹 熊融（北京市农林科学院林业果树研究所，北京市落叶果树工程技术研究中心，农业农村部果品及苗木质量监督检验测试中心（北京），北京 100093）摘要：建立超高效液相色谱-串联质谱法（ultra performance liquid chromatography-tandem mass spectrometry, UPLC-MS/MS）同时测定蜂蜜中19种喹诺酮类药物含量的分析方法。
实验对样品前处理过程及色谱质谱仪器条件进行优化。
蜂蜜样品与超纯水1∶1混合后涡旋振荡溶解，经乙腈溶液超声提取，再加入氯化钠盐析分层，离心后上清液采用C18吸附剂进行净化处理，以ACQUITY BEH C18色谱柱分离。
在电喷雾离子（electrospray ionization, ESI）源正离子扫描模式下，采用多反应监测（multiple reaction monitoring, MRM）模式进行检测，外标法进行定量。
结果表明，19种喹诺酮类药物在3 min内完成色谱分离分析，在0.2~50 μg/L质量浓度范围内呈现良好线性关系，相关系数（R2）均大于0.995，检出限（limit of detection, LOD）为0.25~0.50 μg/kg，定量限（limit of quantification, LOQ）为0.80~1.50 μg/kg。
在低、中、高3个添加浓度水平下，蜂蜜中19种喹诺酮类药物的加标回收率为78.9%~96.5%，相对标准偏差（relative standard deviations, RSDs）为1.8%~4.9%（n=6）。
该方法稳定、准确、灵敏、快速，适用于蜂蜜中喹诺酮类抗生素的快速检测和分析确证。
关键词：QuEChERS；超高效液相色谱-串联质谱；喹诺酮类抗生素；蜂蜜Simultaneous determination of 19 quinolone antibiotics in honey byQuEChERS-UPLC-MS/MSNi Y ang, Y ang Junjun, Shi Lei, Zhang Yingying, Xiong Rong(Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing Engineering Research Center for Deciduous Fruit Trees, Inspection and Testing Laboratory of Fruits and Nursery Stocks (Beijing) Ministry ofAgriculture and Rural Affairs, Beijing 100093, China)Abstract: To establish a method for simultaneous determination of 19 quinolone antibiotics in honey by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) combined with QuEChERS extraction. The pretreatment process and instrument conditions were optimized. Samples were mixed with ultrapure water at a ratio of 1:1, ultrasonic extracted with acetonitrile solution and salted out by adding NaCl. After centrifugation, the supernatant was cleaned up by C18 sorbent and separated on an ACQUITY BEH C18 column. In the electrospray ionization (ESI) positive ion scanning mode, the samples were analyzed by multiple reaction monitoring (MRM) and quantifi ed by external standard method. Result showed that all the 19 quinolone antibiotics were well separated in 3 min and the calibration curves in the range of 0.2-50 μg/L for all compounds were linear with correlation coeffi cients(R2)were more than 0.995. The limits of detection (LODs) and limits of quantifi cation (LOQs) in honey were 0.25-0.50 μg/kg and 0.80-1.50 μg/kg, respectively. The average recoveries of 19 quinolone antibiotics in different matrices at low, medium and high spiked levels were ranged from 78.9%-96.5%, with relative standard deviations (RSDs) in the range of 1.8%-4.9% (n=6). The method is proved to be stable, accurate, sensitive and rapid, and can meet requirements for the rapid and accurate determination of quinolone antibiotics in honey sample.Key words: QuEChERS; UPLC-MS/MS; quinolone antibiotics; honey基金项目：北京市科技计划项目（Z201100008920007），北京市农林科学院科技创新能力建设专项（KJCX20200302）作者简介：倪杨（1985-），女，博士，高级农艺师，研究方向农产品质量安全，E-mail:***************通信作者：熊融（1977-），女，硕士，高级工程师，研究方向植物资源评价与检测技术研究，E-mail:**********************中国蜂业APICULTURE OF CHINA和除杂富集效果有待提高，因其操作复杂、过柱时间长且成本较高，不适合大批量快速检测。
【放射化学系列】铀、镎、钚的放射化学
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硝酸铵-丁二酮肟-百里酚酞体系分离富集镍(Ⅱ)
硝酸铵-丁二酮肟-百里酚酞体系分离富集镍(Ⅱ)涂常青;李雯霞;温欣荣;丘苑红;李敏穗;陈毅平【摘要】建立了一种以微晶百里酚酞作吸附剂分离富集镍(Ⅱ)的新方法.探讨了分离富集镍(Ⅱ)的行为及其与常见离子定量分离的条件,详细讨论了Ni2+的富集机理.结果表明,控制pH8.0,在硝酸铵-丁二酮肟-百里酚酞体系中,镍(Ⅱ)与丁二酮肟(DMG)形成的螯合物沉淀[Ni(DMG)2]可被定量吸附至微晶百里酚酞表面上,形成界面清晰的液-固两相,而锰(Ⅱ)、铜(Ⅱ)、镉(Ⅱ)、铝(Ⅱ)、锌(Ⅱ)等不被吸附,实现了镍(Ⅱ)与这些金属离子的定量分离,据此建立了分离富集镍(Ⅱ)的新方法.方法成功用于合成水样中微量镍(Ⅱ)的定量分离,富集率为95.9％～106.5％.【期刊名称】《冶金分析》【年(卷),期】2014(034)003【总页数】4页(P77-80)【关键词】镍(Ⅱ);分离富集;丁二酮肟;微晶百里酚酞【作者】涂常青;李雯霞;温欣荣;丘苑红;李敏穗;陈毅平【作者单位】嘉应学院化学与环境学院,广东梅州514015;嘉应学院化学与环境学院,广东梅州514015;嘉应学院化学与环境学院,广东梅州514015;嘉应学院化学与环境学院,广东梅州514015;嘉应学院化学与环境学院,广东梅州514015;嘉应学院化学与环境学院,广东梅州514015【正文语种】中文【中图分类】O652.6镍是人体不可缺少的微量元素，对维持人体生理功能起重要作用，缺镍可引起一些病变。
但摄入过量的镍反过来会对人体造成危害。
自然界中的镍常以卤化物、硝酸盐、硫酸盐以及某些无机络合物的形式溶解于水中，因此，测定环境水样中的镍含量对于环境科学和生命科学具有重要意义。
由于环境水样中镍的含量往往很低而无法直接测定，通常在测定之前必须进行分离富集。
目前，有关镍的分离富集方法已有不少报道，主要有溶剂萃取［1－2］，浊点萃取［3－4］，固相萃取［5－6］，非有机溶剂萃取［7－8］，离子交换分离［9－10］，液膜分离［11］，共沉淀分离［12］，等。
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不同水体中挥发性卤代烃的对比
第4卷第2期2005年5月淮阴师范学院学报（自然科学版）JOURNAL OF HUAIYIN TEACHERS COLLEGE （NATURAL SCIENCE EDITION ）VoI.4No.2May.2005不同水体中挥发性卤代烃的对比魏科霞，尹起范（淮阴师范学院分析测试中心，江苏淮安223300）摘要：建立了吹扫-捕集与气相色谱联用技术结合电子捕获检测器分析水体中多种挥发性卤代烃的方法.定量测定了淮安市自来水、古黄河水、运河、内运河及池塘水中的挥发性卤代烃并进行了对比.结果表明，自来水中主要含有氯仿、三氯乙烯、二溴一氯甲烷等，而自来水水源古黄河水中这三种卤代烃的含量极低.运河和内运河中四氯化碳的含量偏高，而且含有少量四氯乙烯.池塘水与古黄河水水质相近.关键词：气相色谱法；吹扫-捕集；电子捕获检测器；挥发性卤代烃中图分类号：O624文献标识码：A文章编号：1671-6876（2005）02-0127-04收稿日期：2004-12-20作者简介：魏科霞（1976-），女，吉林长岭人，助教，硕士，主要从事色谱分析研究.0引言水是人类赖以生存的必备条件.1974年，美国科学家Rook ［1］和BeIIaP ［2］首先发现原水经过氯化后三卤甲烷（THMS ）的含量显著升高.经毒理试验表明，THMS 具有致癌、致畸、致突变作用，对人体健康有害［3］.因此，各国的科学工作者对自来水氯化消毒生成的主要副产物卤代烃展开了积极的研究.许多国家及卫生组织对饮用水中三氯甲烷含量已有明确的限定［4］，如：美国（总THMS 含量!100!g /L ）；中国（!60!g /L ）；前西德和欧洲共同体（!25!g /L ）.吹扫-捕集法（PAT ）适于从液体或固体样品中，富集沸点低于200C 溶，解度小于2%且能被惰性气体吹出的挥发性或半挥发性有机物［5］.美国EPA 已经将PAT 法列为包括卤代烃在内的标准方法的前处理方法［6］.本文建立了一种吹扫-捕集与气相色谱联用技术并使用电子捕获检测器分析水体中6种挥发性卤代烃的方法.应用该方法定量测定了淮安市自来水、古黄河水、运河水、内运河水、池塘水中的VHCS 并进行了对比.实验结果表明，自来水中主要含有氯仿、三氯乙烯、二溴一氯甲烷等，而自来水水源古黄河水中这三种卤代烃的含量极低.运河和内运河中四氯化碳的含量偏高，而且含有少量的四氯乙烯，流水和死水之间卤代烃种类和含量相近.1实验部分1.1仪器和试剂GC-14B 气相色谱仪（63Ni-ECD 检测器，日本岛津公司）；Sepu 3000色谱工作站（杭州普惠科学仪器有限公司）；4560吹扫-捕集浓缩仪（5mL 吹扫管，吸附剂：Tenax /GeI /ChaPcoaI ，O.I.AnaIyticaI ，美国）；HP-5弹性石英毛细管柱（30m X 0.32mm X 1!m FiIm ，J Scientific ，美国）.卤代烃混合标准样品（国家环境保护总局标准样品研究所）；甲醇（色谱纯）；纯水（纯净水煮沸30min 后放置冷却）；标准样品成分及浓度：氯仿（CHCI 3）：100!g /mL ；四氯化碳（CCI 4）：24.5!g /mL ；三氯乙烯（C 2HCI 3）：100!g /mL ；四氯乙烯（C 2CI 4）：49.9!g /mL ；溴仿（CHBP 3）：104!g /mL ；二溴一氯甲烷（CHBP 2CI ）：1010!"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""g /mL.1.2色谱条件程序升温：柱起始温度40C，持续5min，以5C/min程序升温至60C，持续5min，再以20C/min程序升温至200C；进样器温度：220C；检测器温度：220C；载气：高纯N2（!99.999%）；柱流量：2.0mL/min；进样方式：分流进样；分流比：2011.1.3吹扫-捕集条件载气：高纯N2（!99.999%）；载气流速：40mL/min；吹扫时间：11min；热解吸时间：1min；解吸温度：180C；烘烤温度：180C；烘烤时间：10min.1.4空白试验使用常规方法处理的去离子水或重蒸馏水，往往达不到空白值测定的要求，仍然存在一些挥发性卤代烃的色谱干扰峰.实验中将纯净水煮沸30min后冷却所得纯水作为空白样品，进行全程空白试验，无色谱峰干扰.1.5标准溶液的配制将卤代烃混合标准样品及二溴一氯甲烷标准样品于20C环境温度下平衡30min，用微量进样器取250!L卤代烃混合标准样品及10!L二溴一氯甲烷标准样品，注入一预先装有甲醇的50mL容量瓶中，用甲醇稀释至刻度摇匀，配制成储备液.然后用移液管分别吸取储备液1.0，2.0，4.0，8.0，15.0mL至5个250mL容量瓶中，用纯水稀释至刻度摇匀，配制成标准系列待用，各标样的浓度如表1.表1标准样品的浓度（单位：!g/L）编号CHCl3CCl4C2HCl3C2Cl4CHbr3CHbr2Cl1 2.00.5 2.0 1.0 2.10.82 4.0 1.0 4.0 2.0 4.2 1.638.0 2.08.0 4.08.3 3.2416.0 3.916.08.016.6 6.5530.07.430.015.031.212.11.6样品的测定采集水样，用注射器取待测水样5.0mL注入样品管中，以40mL/min流速的高纯N2吹扫11min，吹扫出来的卤代烃收集在已烘烤过的吸附阱中，迅速升温至180C热解吸，自吸附阱中解吸出来的卤代烃，用高纯N2反吹，经六通阀切换导入气相色谱，经HP-5弹性石英毛细管柱分离后，用ECD检测器进行测定.图1卤代烃标准物质的色谱图2结果与讨论2.1样品的定性分析以组分的保留时间作为定性依据，实验所得6种卤代烃标准物质的色谱图如图1，CHCl3，CCl4，821淮阴师范学院学报（自然科学版）第4卷C 2HCI 3，CHBI 2CI ，C 2CI 4，CHBI 3的保留时间分别为3.072，3.767，4.732，8.075，9.876，12.344min.2.2样品的定量分析以峰面积外标多点校正法（n =5）进行定量分析.2.3标准曲线的制作分别取标准溶液5.0mL ，从吹扫-捕集浓缩仪进样，得到6种卤代烃标准物质的色谱图（如图1），将各组分的峰面积（A ）与质量浓度（W ）进行线性回归，得到标准曲线回归方程及相关系数（如表2）.表2回归方程与线性相关系数（n =5）测定组分回归方程相关系数CHCI 3W =2.94559X 10-7+6.64105X 10-11X A0.9989CCI 4W =6.84004X 10-7+9.72626X 10-12X A 0.9996C 2HCI 3W =-3.66527X 10-6+7.73232X 10-11X A0.9972CHBI 2CI W =1.79967X 10-6+2.35147X 10-11X A 0.9999C 2CI 4W =1.34752X 10-7+1.63273X 10-11X A 0.9998CHBI 3W =-4.87679X 10-6+6.76267X 10-11X A0.99942.4精密度与回收率采用峰面积外标法进行定量分析，5次测定结果的相对标准偏差（RSD ）与加标回收率如表3.表3方法的精密度和回收率（n =5）测定组分CHCI 3CCI 4C 2HCI 3CHBI 2CI C 2CI 4CHBI 3加入浓度/（!g /L ）10.0 2.510.0 4.0 4.910.4RSD /（ ）0.70 1.9 3.8 3.1 4.6 2.5回收率/（ ）102.3105.9108.896.6104.996.72.5方法的检出限当纯水进样体积为5.0mL 时，以三倍噪声作为方法的检出限.本方法所测定的6种卤代烃的检出限如表4.表4挥发性卤代烃的检出限（单位：!g /L ）测定组分CHCI 3CCI 4C 2HCI 3CHBI 2CI C 2CI 4CHBI 3检出限0.200.140.880.120.130.742.6水样的测定2.6.1自来水的测定将自来水龙头打开，使水自然流出30min 后，用一磨口样品瓶接取满瓶自来水，取5.0mL 进样，以峰面积外标法定量分析，平行测定4次，取平均值，结果如表5.2.6.2原水的测定分别从淮安市的古黄河、运河、内运河及淮阴师范学院师陶园中的池塘中用矿泉水瓶取满瓶水，不留液上空间，密封带回实验室，置于冰箱中于4C 下保存待测.测定时将试样瓶从冰箱中取出于室温下平衡30min 后，取5.0mL 进样，以峰面积外标法定量分析，平行测定4次，取平均值，测定结果如表5.2.7水样中卤代烃的对比从水样的测定结果可以看出，在古黄河水（淮安市自来水原水）中只检测到氯仿和四氯化碳，且含量极低.而自来水中氯仿、三氯乙烯和二溴一氯甲烷的含量较高，这些卤代烃主要是由氯化消毒产生的.另外还发现淮安市内的两条主要河流运河和内运河中四氯化碳的含量偏高，而且含有少量的自来水和古黄河水中没有检测出的四氯乙烯，估计是这两条河流受到了工业废水的污染.实验中也采集了淮阴师范学院师陶园中的池塘水作为样品，以比较流水和死水之间卤代烃种类和含量的差别.结果发现，校园池塘水与古黄河水水质相差不大，其中卤代烃的种类和含量相近.921第2期魏科霞等：不同水体中挥发性卤代烃的对比表5水样中挥发性卤代烃的检测水样检测项目浓度/（!g/L）自来水CHCI3C2HCI3CHBr2CI23.763.13.9古黄河水CHCI3CCI41.720.28运河水CHCI3CCI4C2CI42.88.60.18内运河水CHCI3CCI4C2CI44.27.60.17校内池塘水CHCI3CCI41.40.27参考文献：［1］Rook J J.Formation of haIoforms during chIorinated of naturaI waters［J］，Water Treat Exam，1974，23：234240.［2］BeIIar T A，Lichtenberg J J，Kroner R C.The occurrence of organohaIides in chIorinated drinking water［J］，J AWWA，1974，66（12）：703706.［3］Bianchi A P，Varney M S，PhiIips J.AnaIysis of voIatiIe organic compounds in estuarine sediments using dynamic headspace and gas chromatography-mass spectrometry［J］.J chromatogr，1991，542：413450.［4］刘明礼.对饮用水中有机污染物的控制［J］.油气田环境保护，1995，5（1）：3135.［5］Buszka P M，Rose D L，Ozuna G B，et aI.Determination of nanogram per Iitre concentrations of voIatiIe organic compounds in water by capiIIary gas chromatography and seIected ion monitoring mass spectrometry and its use to define ground water fIow direc-tions in Edwars aguifer［J］.Texas Ana Chem，1995，67（20）：36593667.［6］中国环境监测总站.固体废弃物试验分析评价手册［M］.北京：中国环境科学出版社，1992.Comparison for Volatile Halohydrocarbons in Different WaterWEI Ke-xia，YIN Oi-fan（AnaIysis and Inspection Center，Huaiyin Teacher CoIIege，Jiangsu Huaian223300，China）Abstract：In this paper estabIishing one method with PAT-GC/ECD to anaIyze6kinds of voIatiIe haIohydrocar-bons（VHCs），determinating them in tap water，in oId Huang He River water，in CanaI water，in InternaI CanaI water and in Iake water guantitativeIy and comparing the VHCs and their content in them.It is shown in the resuIt that CHCI3，C2HCI3and CHBr2CI is the great VHCs in tap water and their concentration in its source water is very Iow compared with that in it.The concentration of CCI4in CanaI water and in InternaI CanaI water is higher and a few C2CI4is detected.The kinds and concentration of VHCs in Lake water is simiIar to those in oId Huang He River water.Key words：gas chromatography；purge and trap；ECD；voIatiIe haIohydrocarbons（VHCs）［责任编辑：蒋海龙］031淮阴师范学院学报（自然科学版）第4卷。