莱伯泰科 DMA-80直接测汞仪

Precise and rapid determination of total mercury in Shampoo can be performed using Direct Mercury Analyzer. Such an instrument requires no sample wet chemistry or pretreatment. Once a weighed sample portion is introduced into the instrument, analysis is complete in six minutes. Direct analysis of mercury, using the integrated sequence of Thermal Decomposition, Catalyst Conversion, Amalgamation, and Atomic Absorption Spectrophotometer, is described in EPA 7473 and is validated for laboratory as well as field analysis.

Precise and rapid determination of total mercury in Shampoo can be performed using Direct Mercury Analyzer. Such an instrument requires no sample wet chemistry or pretreatment. Once a weighed sample portion is introduced into the instrument, analysis is complete in six minutes. Direct analysis of mercury, using the integrated sequence of Thermal Decomposition, Catalyst Conversion, Amalgamation, and Atomic Absorption Spectrophotometer, is described in EPA 7473 and is validated for laboratory as well as field analysis.

摘要： 氯碱行业是我国十分重要的化工生产领域，其产品涉及国民经济生活的各个领域，包括：烧碱、聚氯乙烯、盐酸、液氯、氯化钙、氯化钡、三氯化铁、漂白剂、甲烷氯化物、环氧化合物、氯溶剂、氯化石蜡、金属钠、氯酸钠、直链烃、芳烃氯化物等有机、无机化工产品200余种。 采用ETHOS微波密闭消解—DMA-80WR/M-7600系统对氯碱行业触媒及各种固体、液体、气体废弃物进行汞含量的测定，方法简单快速，重现性好，整个过程汞无损失，尾气有专门的吸收处理装置，不会对环境造成污染，有利于帮助氯碱行业及相关监测部门对汞含量做出精度的测定。

摘要： 提出了DMA80直接汞分析仪测定净水剂中汞的方法。对仪器的工作条件干燥温度和时间、分解温度和时间、等待时间以及汞齐化时间进行了研究。在优化的试验条件下，吸光度与汞的质量分数在300ug/L以内和300~500ug/L之间呈线性关系，检出限（3s）为0.029ng，测定下线（10s）为0.095ng。按此方法分析了净化水剂样品，汞的回收率在90%~**之间，相对标准偏差（n=6）为0.8%~1.1%。 关键词：DMA80直接汞分析仪；净化剂；汞

The US EPA has recently announced that it will begin to regulate em ission of mercury from coal-fired plants, the largest source of hum an-made mercury pollution, generating approximately 43 tons of merc ury each year. Mercury is released not only in stack gasses, but i n plant waste and the coal cleaning process. The EPA will propose f inal regulations on coal-fired power plants by December 15, 2003. Mercury in coal has been traditionally measured by CVAAS (Cold Vapo r Atomic Absorption Spectrophotometry), which is a time and labor c onsuming method that relies on complicated wet chemistry sample pre paration. The DMA-80 Direct Mercury Analyzer from Milestone eliminates the sa mple preparation step, allowing you to completely process your coal samp le in about 10 minutes, instead of the hours needed for traditiona l methods. This rapid testing (which is as accurate, if not more s o, that CVAAS) gives you the answers you need without consuming val uable time and effort. Other benefits include: Process both liquid and solid samples – no matter the matrix you w ill get an accurate total mercury reading. Process coal, coal ash, sludge, etc… The built-in 40-position autosampler allows unattended operation fo r a large number of samples The DMA-80 is portable enough to be stationed where you need it mos t. Sample the coal deliveries as they come in and the plant waste befo re it goes out. No chemicals are used in the process so no additional toxic wastes are generated. Completely compatible with US EPA Method 7473 and ASTM Method D672 2-01

意大利Milestone公司DMA系列直接测汞仪、北京莱伯泰科MAX-S直接测汞仪，其分析功能包括热解析、汞齐化和原子吸收光谱测定，这种设计使得该仪器不需进行化学预处理而直接进行分析样品，每个样品的分析时间约2-5分钟。这一测定系统可应用于各种各样的基体分析，包括环境、地质、疾控、食品、气体检测等不同行业与领域的样品。 测汞仪通道使样品配制和样品分析一体化成为一个自动分析系统。自动进样由精密电气动系统完成，样品再自动插入石英分解管，该试管由两个单独的炉膛：干燥/分解炉和催化剂炉加热。在分解管内，样品首先经过干燥，然后再进行热分解。作为载气的氧气流将分解生成物通过分解管带入催化散炉中，并以最高1000℃的温度完成分解，酸性卤化物和氧化物被吸附，残留的分解产物则进入纳米级金质汞齐化器，在此完成汞吸附。氧气流将一些残余气体排除。然后汞齐化器被迅速加热，汞蒸气被蒸发到吸收管，然后通过原子光谱法在253.7nm处进行测量，测出汞的绝对含量（ng）。

本文参考HJ910-2017建立金膜富集-冷原子吸收分光光度法直接测定环境空气中的气态汞。空气采样器采样，环境空气中的汞被金膜富集管吸附，通过DMA80测定富集管中的汞含量。相对标准偏差RSD为0.82~1.74%，加标回收率为98.7~102.5%。结果表明，该方法具有操作简单、快速高效、检出限低、基体干扰小等优点，可用于环境空气中汞含量的批量分析。

Mercury has been the center of public attention for sometime now du e its high toxicity. There are many ways dangerous concentrations o f elemental mercury can get into the soil including illegal dumpin g of contaminated wastes, manufacturing effluents, and even the sim ple operation and maintenance of mercury manometers. Testing and removal of mercury contaminated soil is a costly and ti me consuming job. Waiting to find out lab results from each sample batch can take hours. But now it^s possible to get lab quality resu lts on site, and in only a few minutes.

建立了直接测汞法快速测定土壤中总汞的方法。样品进行热分解，样品中的汞经金汞齐化管富集，加热破坏汞齐后，采用冷原子吸收光谱进行总汞分析。试验结果表明，采用直接测汞法测定土壤中总汞含量有良好的效果，完全可以替代国标方法GB/T 17136-1997。该方法快速、准确且无药品试剂污染，重现性优于采用国标方法测定的结果。

建立用热分解齐化原子吸收光度法测定废水中总汞的方法。 将样品加热至650℃，使所有汞转化成蒸气，利用催化管将蒸气中的二价汞转化成零价汞，再利用金管捕集零价汞，加热金管释放零价汞并使其进入分析单元，在253．7 nm处以冷原子光谱法测定汞含量。方法检出限（tS）为0．045μg/L，测定下限为 0．180μg/L。相对标准偏差ＲSD为2．3% ～4．6%，加标回收率 P为86．2%～94．8%。用热分解齐化原子吸收光度法直接测定废水中总汞，操作简单，污染小，毒性低，可替代《水质 总汞的测定冷原子吸收分光光度法》（HJ597－2011）

土壤是农业生产和人类生存的主要载体和生态环境的重要组成部分，其质量好坏与人们生活息息相关。然而近年来，随着我国经济和社会发展，土壤污染日益严重， 已成为严重的生态问题。土壤污染是指进入土壤中的有害、有毒物质超出土壤的自身净化能力，导致土壤的物理、化学和生物学性质发生改变，直接影响土壤生态系统的结构和功能，导致生产力退化，并最终对生态安全和人类生命健康构成威胁的现象。土壤污染主要是人为造成的污染源，如“三废”的排放，即废气、废渣、废水，还有过量使用农药、化肥、重金属、微生物、化学物品等。 土壤污染具有隐蔽性、潜伏性和长期性，特别是土壤中重金属的污染基本上是一个不可逆转的过程，土壤重金属被植物吸附和积累后，通过食物链富集到人和动物体中，从而危害人畜健康引发癌症等疾病，如水俣病、骨痛病等。同时被污染土壤中的重金属会通过风力、地表径流、淋溶作用等进入大气和水体中，导致大气、地表水、地下水污染和生态系统退化。由于进入土壤中的重金属污染物以可溶性与不溶性颗粒存在，因此残留率很高，如镉、铜、锌、铅等可达85-95%，有些元素甚至会被植物吸收在其体内累积，如铬；另外，各种有机物污染也让人触目惊心。因此如何快速、准确地测试土壤中有害重金属元素及有机污染物显得尤为迫切。为此，Labtech公司提出了检测土壤中的有机物及重金属元素的前处理解决方案。

Precise and rapid determination of total mercury in Powder face can be performed using Direct Mercury Analyzer. Such an instrument requires no sample wet chemistry or pretreatment. Once a weighed sample portion is introduced into the instrument, analysis is complete in six minutes. Direct analysis of mercury, using the integrated sequence of Thermal Decomposition, Catalyst Conversion, Amalgamation, and Atomic Absorption Spectrophotometer, is described in EPA 7473 and is validated for laboratory as well as field analysis.

Precise and rapid determination of total mercury in Lipstick can be performed using Direct Mercury Analyzer. Such an instrument requires no sample wet chemistry or pretreatment. Once a weighed sample portion is introduced into the instrument, analysis is complete in six minutes. Direct analysis of mercury, using the integrated sequence of Thermal Decomposition, Catalyst Conversion, Amalgamation, and Atomic Absorption Spectrophotometer, is described in EPA 7473 and is validated for laboratory as well as field analysis.

Precise and rapid determination of total mercury in Powder face can be performed using Direct Mercury Analyzer. Such an instrument requires no sample wet chemistry or pretreatment. Once a weighed sample portion is introduced into the instrument, analysis is complete in six minutes. Direct analysis of mercury, using the integrated sequence of Thermal Decomposition, Catalyst Conversion, Amalgamation, and Atomic Absorption Spectrophotometer, is described in EPA 7473 and is validated for laboratory as well as field analysis.

Precise and rapid determination of total mercury in Lipstick can be performed using Direct Mercury Analyzer. Such an instrument requires no sample wet chemistry or pretreatment. Once a weighed sample portion is introduced into the instrument, analysis is complete in six minutes. Direct analysis of mercury, using the integrated sequence of Thermal Decomposition, Catalyst Conversion, Amalgamation, and Atomic Absorption Spectrophotometer, is described in EPA 7473 and is validated for laboratory as well as field analysis.

硫柳汞又名乙基汞硫代水杨酸钠，是一种含汞有机化合物，以重量计含汞49.6%。是一种在疫苗中广泛使用的防腐剂。由于是汞制剂，硫柳汞的加入量必须严格控制，以防止对人体造成毒害，所以我国药典规定对生物制品（疫苗）中硫柳汞含量要进行测定，以确保生物制品质量符合国家标准。本文参考《中国药典》2020版3115硫柳汞测定法，通过DMA80快速测定生物制品中的硫柳汞含量。相对标准偏差RSD为0.68~0.91%，加标回收率为98.6~98.8%。结果表明，该方法具有操作简单、快速高效等优点，可用于生物制品中硫柳汞含量的快速测定。

在日常生活中，各种类型的药物可以满足人们治病或者保健的需要。然而，并非所有药物中的物质含量都对人体无害。很多药物中都存在重金属物质。重金属物质可能来自于药品原材料辅料及生产设备，也可能来自药品存储及运输等过程。世界各地的监管机构负责确保药品的有效性与安全性。为实现这一目标，必须对潜在有毒和有害的污染物（包括元素杂质）进行鉴定，并规定患者允许暴露的最大浓度。因此，在药物分析检测中，如何有效地对药物中重金属进行检查是医药研发人员一项重要的工作。

准备好了吗？2020年即将来临，新版药典（2020年版）初稿也已编纂完成，现正处于公示阶段。时隔五年，相较于现行的2015年版，2020年版一部新增中药标准约220个，修订完善中药标准约500个。其中重点解决中药材和中药饮片的农药残留、重金属及有害元素以及真菌毒素的限量标准。

汞作为有毒重金属之一，其毒性排列在首位。目前汞被联合国环境规划署列为全球性污染物，是除了温室气体外**一种对全球范围产生影响的化学物质。20世纪以来，随着汞在工业、农业、医药以及日常生活中的广泛应用，汞的生产量和使用量剧增，致使大量汞随人类活动进入到环境。汞对自然界和人体都具有很大的危害，我国对汞的监测也十分重视，也出台了很多关于汞检测的标准。由于汞易挥发、记忆效应强，在前处理过程中存在损失，在原子荧光、ICP-MS中存在记忆效应，因此常规的方法比较繁琐、耗时。直接测汞仪也越来越收到广泛的关注。

目前，国家打击各种刑事案件的力度在不断增大。在各种刑事案件的侦破中，毒物作为证据及其鉴定结论的准确性是至关重要的。在司法领域涉及的无机毒物主要是金属毒物，如砷、汞、钡、铊等（清华才女朱令铊中毒）。主要的检材包括体外检材（现场环境、遗留食品等）、体内检材（尿液、血液、组织、头发）。采用微波消解等前处理技术，结合ICP-MS等分析技术，可以对痕量物质进行快速定性、定量分析，为案件定性提供可靠依据。还可为农业环境污染、污染物排放等引起的农作物污染进行因果关系鉴定和损失评估。 莱伯泰科一直致力于样品的前处理领域，在样品前处理领域有着自己独特的优势，现结合国家相关标准方法和现有前处理仪器，推出公安刑侦领域前处理解决方案，供广大用户进行参考。

2017年8月16日起，《关于汞的水俣公约》对中国生效。10月27日，世界卫生组织国际癌症研究机构公布的致癌物清单初步整理参考，汞和无机汞化合物在3类致癌物清单。2019年7月23日，汞及汞化合物被列入有毒有害水污染物名录（第一批）。 那么，汞是什么？汞是自然生成的元素，常见于空气、水和土壤中，同时汞也是一种剧毒的非必需元素，广泛存在于各类环境介质和食物链中，其踪迹遍布全球各个角落。汞也是在生态系统中能完全循环的唯一重金属。汞通过火山挥发进入大气，入水沉积于污泥、土壤中，在细菌作用下生成甲基汞，从而进入植物，被制成饲料，在动物体内累积，最终威胁人类的身体健康与生命安全。 公众对动物源性产品安全的重视程度日益增强,对饲料中的各种物质进行分析与检测，在保障营养成分含量的同时也需要控制有毒物质的含量，减少有毒物质对动物损害以及在动物体内残留，保障动物健康成长，这样才能从源头上防止重金属进入人们的餐桌。 实验人员对汞的检测方法的探索从未间断过，但由于从广泛意义上来说汞是常温常压下唯一以液态存在的金属，在消解过程中容易损失，分析测试时又常常因记忆效应令实验人员头痛不已。本文通过使用DMA-80直接测汞仪省去加酸消解等前处理步骤，直接对饲料中的重金属汞进行检测。

民以食为天，食以安为先。众所周知，粮食是人类赖以生存和发展的最基本物质基础。粮食安全关系到广大人民群众的身体健康和生命安全，关系到经济健康发展和社会稳定。随着人们对粮食安全的关注，越来越多的人开始重视粮食安全，粮食安全已经成为世界性问题。 粮食重金属超标是我们国家重点检测的项目之一。常见重金属元素由于某些原因未经处理就被排除河流、湖泊或海洋，或者进入了土壤中，使得这些河流、湖泊、海洋和土壤收到污染，它们不能被生物降解。重金属被稻谷、小麦等农作物吸收被人类食用，重金属就会进入人体使人产生重金属中毒，轻则发生怪病，重者导致死亡。 莱伯泰科一直致力于样品的前处理领域，在样品前处理领域有着自己独特的优势，现结合国家相关标准方法和现有前处理仪器，推出粮油无机样品前处理解决方案，供广大用户进行参考。

摘要： 当今社会越来越关注孕妇及其胎儿和小孩食用被汞污染鱼类和水产品的危害性。美 国食品和药物管理局（USFDA）警告人们减少对旗鱼、鲨鱼和金枪鱼的消费。美国 的海洋渔业、美国环保署（USEPA）和美国食品及药物管理局正非常谨慎地监控在 海中和淡水中的鱼类体内的汞含量水平。 可以使用DMA-80直接测汞仪精确而快速地完成对鱼组织、贝类组织、龙虾组织和比 目鱼组织的汞含量的测定。该仪器不需对样品进行湿化学处理或前处理。当若干重 的部分样品放入仪器中，不到10分钟就可以完成分析。直接测定汞含量，采用一体 化的热分解、接触反应转换、融合、和原子吸收光谱测量的分析顺序，EPA 7473方 法描述了该过程，这种方法适合于实验室和野外测量分析。

摘要： 当今社会越来越关注孕妇及其胎儿和小孩食用被汞污染鱼类和水产品的危害性。美 国食品和药物管理局（USFDA）警告人们减少对旗鱼、鲨鱼和金枪鱼的消费。美国 的海洋渔业、美国环保署（USEPA）和美国食品及药物管理局正非常谨慎地监控在 海中和淡水中的鱼类体内的汞含量水平。 可以使用DMA-80直接测汞仪精确而快速地完成对鱼组织、贝类组织、龙虾组织和比 目鱼组织的汞含量的测定。该仪器不需对样品进行湿化学处理或前处理。当若干重 的部分样品放入仪器中，不到10分钟就可以完成分析。直接测定汞含量，采用一体 化的热分解、接触反应转换、融合、和原子吸收光谱测量的分析顺序，EPA 7473方 法描述了该过程，这种方法适合于实验室和野外测量分析。

摘要： 当今社会越来越关注孕妇及其胎儿和小孩食用被汞污染鱼类和水产品的危害性。美 国食品和药物管理局（USFDA）警告人们减少对旗鱼、鲨鱼和金枪鱼的消费。美国 的海洋渔业、美国环保署（USEPA）和美国食品及药物管理局正非常谨慎地监控在 海中和淡水中的鱼类体内的汞含量水平。 可以使用DMA-80直接测汞仪精确而快速地完成对鱼组织、贝类组织、龙虾组织和比 目鱼组织的汞含量的测定。该仪器不需对样品进行湿化学处理或前处理。当若干重 的部分样品放入仪器中，不到10分钟就可以完成分析。直接测定汞含量，采用一体 化的热分解、接触反应转换、融合、和原子吸收光谱测量的分析顺序，EPA 7473方 法描述了该过程，这种方法适合于实验室和野外测量分析。

摘要： 当今社会越来越关注孕妇及其胎儿和小孩食用被汞污染鱼类和水产品的危害性。美 国食品和药物管理局（USFDA）警告人们减少对旗鱼、鲨鱼和金枪鱼的消费。美国 的海洋渔业、美国环保署（USEPA）和美国食品及药物管理局正非常谨慎地监控在 海中和淡水中的鱼类体内的汞含量水平。 可以使用DMA-80直接测汞仪精确而快速地完成对鱼组织、贝类组织、龙虾组织和比 目鱼组织的汞含量的测定。该仪器不需对样品进行湿化学处理或前处理。当若干重 的部分样品放入仪器中，不到10分钟就可以完成分析。直接测定汞含量，采用一体 化的热分解、接触反应转换、融合、和原子吸收光谱测量的分析顺序，EPA 7473方 法描述了该过程，这种方法适合于实验室和野外测量分析。

[摘要] 目的：建立用测汞仪直接测定并评价南京地区超市和农贸市场所售鲫鱼组织中的汞含量。方法：用直接测汞仪，分别测定鱼皮、鱼脑、鱼肉及鱼籽组织中的汞含量。结果：鲫鱼组织中的汞含量呈如下规律：鱼脑 > 鱼皮 > 鱼肉 > 鱼籽；鱼龄越大，体内富集的汞越多。对汞含量在0.12～20.00ng范围内呈线性关系，相关系数r=0.9999，**检出限为0.04 ng。样品加标回收率为95.8～104.4%，RSD为1.63～2.92%。本方法与国标法无显著性差异。结论：本方法精密度和准确度较好，测汞时无需进行样品前处理，具有取样量少，简单、准确和高效等特点，能满足样品检测的要求。 [ 关键词 ] 直接测汞仪；鲫鱼；汞含量；分析测定

将金精矿粉样品直接置于石英舟中，在高纯氧气氛中燃烧，释放出汞，与齐化管中的金形成金齐化，于900℃加热放出汞蒸气，用直接测汞仪法测定汞的含量。测定结果的相对标准偏差为0.28%-1.57%（n=6）,方法检出限为1.0ug/kg,加标回收率为95.7%-117.4%。用该法对4种土壤标准样品进行了测定，测定结果与标准值相符。该方法适合于金精矿粉中微量汞的测定。 关键词 固体进样；直接测汞仪；金精矿粉；汞

摘要 将金精矿粉样品直接置于石英舟中，在高纯氧气氛中燃烧，释放出汞，与齐化管中的金形成金齐化，于900℃加热放出汞蒸气，用直接测汞仪法测定汞的含量。测定结果的相对标准偏差为0.28%-1.57%（n=6）,方法检出限为1.0ug/kg,加标回收率为95.7%-117.4%。用该法对4种土壤标准样品进行了测定，测定结果与标准值相符。该方法适合于金精矿粉中微量汞的测定。 关键词 固体进样；直接测汞仪；金精矿粉；汞

The US EPA has recently announced that it will begin to regulate em ission of mercury from coal-fired plants, the largest source of hum an-made mercury pollution, generating approximately 43 tons of merc ury each year. Mercury is released not only in stack gasses, but i n plant waste and the coal cleaning process. The EPA will propose f inal regulations on coal-fired power plants by December 15, 2003. Mercury in coal has been traditionally measured by CVAAS (Cold Vapo r Atomic Absorption Spectrophotometry), which is a time and labor c onsuming method that relies on complicated wet chemistry sample pre paration. The DMA-80 Direct Mercury Analyzer from Milestone eliminates the sa mple preparation step, allowing you to completely process your coal samp le in about 10 minutes, instead of the hours needed for traditiona l methods. This rapid testing (which is as accurate, if not more s o, that CVAAS) gives you the answers you need without consuming val uable time and effort. Other benefits include: Process both liquid and solid samples – no matter the matrix you w ill get an accurate total mercury reading. Process coal, coal ash, sludge, etc… The built-in 40-position autosampler allows unattended operation fo r a large number of samples The DMA-80 is portable enough to be stationed where you need it mos t. Sample the coal deliveries as they come in and the plant waste befo re it goes out. No chemicals are used in the process so no additional toxic wastes are generated. Completely compatible with US EPA Method 7473 and ASTM Method D672 2-01

Approximately 2700 – 6000 tons of mercury are released into the at mosphere annually. Once airborne, mercury can travel thousand mile s from its generation point. Eventually, it precipitates onto the l and and water. And once it enters water, mercury is transformed by microorganisms into methylmercury, the most toxic and dangerous for m of mercury. Exposure to high dosage of methylmercury can cause tremors, inabili ty to walk, convulsions and even death. Children exposed to the mercury show a variety of abnormalities such as delayed onset of walking and talking, cerebra l palsy, and slowed neurological reflexes and learning abilities. One of the best indicators of exposure to mercury is testing for co ncentration in hair and blood. The average concentration of mercur y in non-exposed people is about 8 ppb in blood and 2 ppm in hair Mercury has traditionally been measured in hair, blood, tissues, an d urine by CVAAS (Cold Vapor Atomic Absorption Spectrophotometry), which is a time and labor consuming method that relies on complicat ed wet chemistry sample preparation. The DMA-80 Direct Mercury Analyzer from Milestone eliminates the sa mple preparation step, allowing you to rapidly process your samples in m inutes, instead of the hours needed for traditional methods. This r apid testing (which is as accurate, if not more so, that CVAAS) giv es you the answers you need without consuming valuable time and eff ort. Other benefits include: Process both liquid and solid samples – no matter how difficult th e matrix you will get an accurate total mercury reading. The built-in 40-position autosampler allows unattended operation fo r a large number of samples The DMA-80 is portable enough to be stationed where you need it mos t; in your laboratory, in a portable testing van, etc... No chemicals are used in the process so no additional toxic wastes are generated. Completely compatible with US EPA Method 7473

Approximately 2700 – 6000 tons of mercury are released into the at mosphere annually. Once airborne, mercury can travel thousand mile s from its generation point. Eventually, it precipitates onto the l and and water. And once it enters water, mercury is transformed by microorganisms into methylmercury, the most toxic and dangerous for m of mercury. Exposure to high dosage of methylmercury can cause tremors, inabili ty to walk, convulsions and even death. Children exposed to the mercury show a variety of abnormalities such as delayed onset of walking and talking, cerebra l palsy, and slowed neurological reflexes and learning abilities. One of the best indicators of exposure to mercury is testing for co ncentration in hair and blood. The average concentration of mercur y in non-exposed people is about 8 ppb in blood and 2 ppm in hair Mercury has traditionally been measured in hair, blood, tissues, an d urine by CVAAS (Cold Vapor Atomic Absorption Spectrophotometry), which is a time and labor consuming method that relies on complicat ed wet chemistry sample preparation. The DMA-80 Direct Mercury Analyzer from Milestone eliminates the sa mple preparation step, allowing you to rapidly process your samples in m inutes, instead of the hours needed for traditional methods. This r apid testing (which is as accurate, if not more so, that CVAAS) giv es you the answers you need without consuming valuable time and eff ort. Other benefits include: Process both liquid and solid samples – no matter how difficult th e matrix you will get an accurate total mercury reading. The built-in 40-position autosampler allows unattended operation fo r a large number of samples The DMA-80 is portable enough to be stationed where you need it mos t; in your laboratory, in a portable testing van, etc... No chemicals are used in the process so no additional toxic wastes are generated. Completely compatible with US EPA Method 7473

Approximately 2700 – 6000 tons of mercury are released into the at mosphere annually. Once airborne, mercury can travel thousand mile s from its generation point. Eventually, it precipitates onto the l and and water. And once it enters water, mercury is transformed by microorganisms into methylmercury, the most toxic and dangerous for m of mercury. Exposure to high dosage of methylmercury can cause tremors, inabili ty to walk, convulsions and even death. Children exposed to the mercury show a variety of abnormalities such as delayed onset of walking and talking, cerebra l palsy, and slowed neurological reflexes and learning abilities. One of the best indicators of exposure to mercury is testing for co ncentration in hair and blood. The average concentration of mercur y in non-exposed people is about 8 ppb in blood and 2 ppm in hair Mercury has traditionally been measured in hair, blood, tissues, an d urine by CVAAS (Cold Vapor Atomic Absorption Spectrophotometry), which is a time and labor consuming method that relies on complicat ed wet chemistry sample preparation. The DMA-80 Direct Mercury Analyzer from Milestone eliminates the sa mple preparation step, allowing you to rapidly process your samples in m inutes, instead of the hours needed for traditional methods. This r apid testing (which is as accurate, if not more so, that CVAAS) giv es you the answers you need without consuming valuable time and eff ort. Other benefits include: Process both liquid and solid samples – no matter how difficult th e matrix you will get an accurate total mercury reading. The built-in 40-position autosampler allows unattended operation fo r a large number of samples The DMA-80 is portable enough to be stationed where you need it mos t; in your laboratory, in a portable testing van, etc... No chemicals are used in the process so no additional toxic wastes are generated. Completely compatible with US EPA Method 7473

摘　要　 建立了甲苯二次萃取-直接测汞的方法对生物样品中的甲基汞进行分析测定．样品经氢溴酸水解、甲苯萃取、Ｌ-半胱氨酸反萃取等前处理，应用ＤＭＡ-８０直接测汞仪测定．对甲基汞鱼肉标准物质（ＧＢＷ１００２９）和贻贝标准物质（ＳＲＭ２９７６）的实测结果显示，测定值与标准参考值的相对误差小于４％，测定值的相对标准偏差小于２％，甲基汞的检出限为０．６４ｎｇ·ｇ－１，甲苯二次萃取的萃取率在９５％—９９％之间．该方法具有较高的准确度和精密度，适于鱼、贝等生物体中甲基汞的测定，并可将总汞和甲基汞的测定在一台仪器上完成． 关键词　甲基汞，海产品，甲苯萃取，直接测汞法．

目的 建立热分解齐化原子吸收法测定尿中总汞的方法。方法 样品不经消解处理，采用直接测汞仪测定。结果 样品基体干扰少，测定方法线性良好，线性范围0.0ng~1200ng,方法检出限为0.0050ng,精密度1.50%~2.62%之间，回收率在102%~107%之间，测定国家标准参考物质，测定值均在标准值范围内。结论 热分解齐化原子吸收法方法简便、快捷、干扰少、灵敏度高，适用于职业卫生中尿汞的筛查及汞中毒的快速检测，有较高实用价值。

Approximately 2700 – 6000 tons of mercury are released into the at mosphere annually. Once airborne, mercury can travel thousand mile s from its generation point. Eventually, it precipitates onto the l and and water. And once it enters water, mercury is transformed by microorganisms into methylmercury, the most toxic and dangerous for m of mercury. Exposure to high dosage of methylmercury can cause tremors, inabili ty to walk, convulsions and even death. Children exposed to the mercury show a variety of abnormalities such as delayed onset of walking and talking, cerebra l palsy, and slowed neurological reflexes and learning abilities. One of the best indicators of exposure to mercury is testing for co ncentration in hair and blood. The average concentration of mercur y in non-exposed people is about 8 ppb in blood and 2 ppm in hair Mercury has traditionally been measured in hair, blood, tissues, an d urine by CVAAS (Cold Vapor Atomic Absorption Spectrophotometry), which is a time and labor consuming method that relies on complicat ed wet chemistry sample preparation. The DMA-80 Direct Mercury Analyzer from Milestone eliminates the sa mple preparation step, allowing you to rapidly process your samples in m inutes, instead of the hours needed for traditional methods. This r apid testing (which is as accurate, if not more so, that CVAAS) giv es you the answers you need without consuming valuable time and eff ort. Other benefits include: Process both liquid and solid samples – no matter how difficult th e matrix you will get an accurate total mercury reading. The built-in 40-position autosampler allows unattended operation fo r a large number of samples The DMA-80 is portable enough to be stationed where you need it mos t; in your laboratory, in a portable testing van, etc... No chemicals are used in the process so no additional toxic wastes are generated. Completely compatible with US EPA Method 7473