摘要

本文中使用PrepElite-SV全自动固相萃取-定量浓缩前处理平台测定蔬菜中的联苯菊酯的残留，大大简化繁琐的样品前处理流程，降低实验室工作量，提高工作效率，保证结果的平行性和准确性，系统的密闭性及溶剂回收功能，也可保护操作人员免受有毒有害物质的危害，同时实验具有较高的回收率，能够完全满足农残测定实验需求。

摘要

偶氮染料是现染料市场中品种数量上最多的一种染料，由染料分子中含有偶氮基而得名。这类染料会发生还原反应形成致癌的芳香胺化合物，因此部分偶氮染料遭到禁用。同时，偶氮染料对水环境的污染也备受关注。本实验使用Sepaths全自动固相萃取仪对水中邻甲苯胺进行萃取富集，并对萃取效果进行了检测。本文建立了Sepaths全自动固相萃取净化GC-MS测定偶氮染料固相萃取分析方法。回收率均在68%~94%之间，该方法简便可靠，适用于纺织品轻工等行业。

摘要

偶氮染料是现染料市场中品种数量上最多的一种染料，由染料分子中含有偶氮基而得名。这类染料会发生还原反应形成致癌的芳香胺化合物，因此部分偶氮染料遭到禁用。同时，偶氮染料对水环境的污染也备受关注。本实验使用Sepaths全自动固相萃取仪对水中对氯苯胺进行萃取富集，并对萃取效果进行了检测。本文建立了Sepaths全自动固相萃取净化GC-MS测定偶氮染料固相萃取分析方法。回收率均在68%~94%之间，该方法简便可靠，适用于纺织品轻工等行业。

摘要

偶氮染料是现染料市场中品种数量上最多的一种染料，由染料分子中含有偶氮基而得名。这类染料会发生还原反应形成致癌的芳香胺化合物，因此部分偶氮染料遭到禁用。同时，偶氮染料对水环境的污染也备受关注。本实验使用Sepaths全自动固相萃取仪对水中4-氯邻甲苯胺进行萃取富集，并对萃取效果进行了检测。本文建立了Sepaths全自动固相萃取净化GC-MS测定偶氮染料固相萃取分析方法。回收率均在68%~94%之间，该方法简便可靠，适用于纺织品轻工等行业。

摘要

偶氮染料是现染料市场中品种数量上最多的一种染料，由染料分子中含有偶氮基而得名。这类染料会发生还原反应形成致癌的芳香胺化合物，因此部分偶氮染料遭到禁用。同时，偶氮染料对水环境的污染也备受关注。本实验使用Sepaths全自动固相萃取仪对水中联苯胺进行萃取富集，并对萃取效果进行了检测。本文建立了Sepaths全自动固相萃取净化GC-MS测定偶氮染料固相萃取分析方法。回收率均在68%~94%之间，该方法简便可靠，适用于纺织品轻工等行业。

摘要

砷广泛存在于自然界中，可以通过多种途径进入生物圈和食物链。砷及其化合物在人体内具有蓄积性，容易在人体内积累，可引起人体的急慢性中毒。正因为砷及其化合物在食品和土壤中的潜在风险，在食品和土壤安全风险监测中总砷的测定被列为重点监测项目而加以重视。如何更加快速有效地处理食品和土壤样品，提供总砷的监测效率，对及时处置砷中毒事件及日常风险监测工作，是食品和土壤砷含量监测面临的课题。准确测定食品和土壤中的微量或痕量元素的关键是样品的前处理，样品的前处理直接影响分析结果的精密度和准确度。在先进的分析仪器被广泛应用时，再用陈旧、落后的传统加热方式来处理样品，就会严重地制约现代分析仪器的先进性。传统的干法灰化和湿法消解操作时间长、挥发元素易损失、易污染环境，而微波消解可以克服易挥发元素的损失，同时具有操作简便、溶剂用量少等优点，因此，微波消解已在食品、环境、化妆品、医药等行业得到了广泛的应用

摘要

实验参考了方法HJ 784-2016和HJ 783-2016，简要介绍了使用莱伯泰科高效快速溶剂萃取系统（HPSE）萃取土壤中的苯并[α]芘，并用高效液相色谱进行检测的一系列方法。实验方法简便，回收率较高且平行性良好。适用于土壤中苯并[α]芘的检测。

摘要

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.

摘要

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

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

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

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

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

摘要

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

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