地面水中氨,硝酸盐,亚硝酸盐,氯化物,正磷酸盐,总硬度和硅酸盐的同时测定

用AQUA800辨别分析仪同时测定地面水中的氨、硝酸盐、亚硝酸盐、氯化物、正磷酸盐、总硬度和硅酸盐,是一种简便、迅速、准确、可靠的测定方法,样品无需预处理,精密度试验其变异系数分别为1．24％、2．18％、2．02％、2．67％、2．35％、3．57％、4．78％,加标回收率分别为103．5％、101．0％、95．0％、99．2％、97．6％、101．5％、98．0％,方法检测限分别为氨0．022mg／L,硝酸盐0．015mp／L,亚硝酸盐0．002tug／L,氯化物0．47mg／L,正磷酸盐0．015mg／L,总硬度17．6mg／L,硅酸盐0．55mg/L,能满足地面水中辨别分析仪同时测定氨、硝酸盐、亚硝酸盐点化物、正磷酸盐、总硬度和硅酸盐分析测定的要求。     

The occurrence of glyphosate, atrazine, and other pesticides in vernal pools and adjacent streams in Washington, DC, Maryland, Iowa, and Wyoming, 2005–2006

Vernal pools are sensitive environments that provide critical habitat for many species, including amphibians. These small water bodies are not always protected by pesticide label requirements for no-spray buffer zones, and the occurrence of pesticides in them is poorly documented. In this study, we investigated the occurrence of glyphosate, its primary degradation product aminomethylphosphonic acid, and additional pesticides in vernal pools and adjacent flowing waters. Most sampling sites were chosen to be in areas where glyphosate was being used either in production agriculture or for nonindigenous plant control. The four site locations were in otherwise protected areas (e.g., in a National Park). When possible, water samples were collected both before and after glyphosate application in 2005 and 2006. Twenty-eight pesticides or pesticide degradation products were detected in the study, and as many as 11 were identified in individual samples. Atrazine was detected most frequently and concentrations exceeded the freshwater aquatic life standard of 1.8 micrograms per liter (microg/l) in samples from Rands Ditch and Browns Ditch in DeSoto National Wildlife Refuge. Glyphosate was measured at the highest concentration (328 microg/l) in a sample from Riley Spring Pond in Rock Creek National Park. This concentration exceeded the freshwater aquatic life standard for glyphosate of 65 microg/l. Aminomethylphosphonic acid, triclopyr, and nicosulfuron also were detected at concentrations greater than 3.0 microg/l.     

火焰原子吸收法测定河流沉积物中微量铜,铅,锌,镉,镍

河流沉积物中微量金属元素的原子吸收测定法已有报道,通常采用的分解方法是用高氯酸—氢氟酸—硝酸混合酸体系消解.但此法的分解效果不是很好,分解液中往往有油脂状物质残留,分解后期会出现溅暴现象,影响测定结果的重现性和准确性.本文研究了用氯酸—氢氟酸—硝酸混合酸体系分解河流沉积物样品.与上述方法比较,此方法分解效果好,分解液澄清,没有油脂状物质残留;操作方便,避免了溅暴现象.     

抓住机遇,走出困境,谋求发展

抓住机遇，走出困境，谋求发展ＣａｔｃｈＯｐｐｏｒｔｕｎｉｔｙ，ＧｅｔＲｉｄｏｆＤｉｌｅｍｍａａｎｄＳｅｋＤｅｖｅｌｏｐｉｎｇＲｏａｄ王宜党（盐城市环境监测中心站盐城２２４００２）国家环境保护局《关于进一步加强环境监测工作的决定》指出：“环境监测实质上...     

火焰原子吸收法测定大气降尘中的铜,铅,锌,镉

火焰原子吸收法测定大气降尘中的铜、铅、锌、镉康新立（山西省运城地区环保局０４４０００）杨俊玲（山西省运城地区药检所０４４０００）大气中重金属的测定，以往是将大气中重金属采集到氯乙烯滤膜上，用氯仿溶解滤膜后，直接用火焰原子吸收法进行测定，由于含量较低，...     

火焰原子吸收法测定人发中铜,锌,钙,镁

环境、微量元素及人体健康之间存在着十分密切的关系.迄今为止,在人体内已经发现了60多种微量元素.人发中的微量元素含量,可以反映出人体微量元素的水平.人发样品易于采集,易于保存,代表性好.因而测定人发微量元素的工作对环境科学、诊断疾病、评定营养状况和环境污染状况等方面起着重要作用.     

与时俱进,开拓创新,努力开创环境监测工作新局面

在党的“十六大”召开前夕 ,我们召开了第六次全国环境监测工作会议。会议开得很成功 ,富有成效。心芳同志代表总局所作的工作报告 ,我完全同意 ,希望大家回去后认真组织学习 ,抓好落实。下面 ,我讲三点意见 :1　环境保护工作取得的主要成绩90年代以来 ,特别是 1 998年以来 ,党中央、国务院对环境保护高度重视。江泽民总书记把环境保护摆到关系国家前途和命运的战略高度 ,作出了一系列重要指示 ,为正确处理经济社会发展和环境保护的关系 ,保障国家环境安全指明了方向。各级党委和政府在环境保护和可持续发展领域做了大量工作 ,全民环境意识…     

陇南山地贫困区人口,资源,环境与发展

通过１９９８年中国西部扶贫世界银行贷款农业开发项目环境影响评价工作,对甘肃省陇南山地贫困区的贫困成因及人口和生态环境现状进行分析,提出了实现该地区脱贫致富和人口,资源,环境,经济协调发展的主要途径。     

运用计算机分析钙,镁,总硬度数据

计算机在环境监测中的应用已经很普及,但主要是将FOXPRO、FOXBASE、DBASE等数据库语言运用于环境统计、环境评价等数据的处理中。BASIC语言以它的通俗易懂、易学、易掌握、适用范围广等特点受到广大计算机用户的欢迎。我们经过实践编制了简便实用的BASIC程序,并将其运用于环境监测分析数据的计算与分析中,使工作效率大大提高,减少了劳动强度。1分析项目的方法及计算公式水的总硬度是指钙和镁的总浓度,它是地下水和地面水的必测项目之一。EDTA络合滴定法简单快速,是一般最常选用的方法。在分析测试中,一般是先分析后计算…     

Environmental Contaminants in Blood, Hair, and Tissues of Ocelots from the Lower Rio Grande Valley, Texas, 1986–1997

The ocelot (Felis pardalis) isan endangered neotropical cat distributed within asmall range in the Lower Rio Grande Valley (LRGV), inTexas, U.S.A. Studies of the impacts of environmentalcontaminants in wild cats are few. Approximately onefourth of the estimated population (about 100) ofocelots in the LRGV was sampled to evaluate theimpacts of chlorinated pesticides, polychlorinatedbiphenyls, and trace elements on the population. Hairwas collected from 32 ocelots trapped between 1986–1992,and blood was collected from 20 ocelots trappedbetween 1993–1997. A few blood samples were obtainedfrom individuals recaptured two or three times. Tissue samples from 4 road-killed ocelots were alsoanalyzed. DDE, PCBs, and Hg were some of the mostcommon contaminants detected in hair and blood. MeanHg levels in hair ranged from 0.5 to 1.25 g g^-1 dw,Se from 1.5 to 3.48 g g^-1 dw, and Pb from 0.56 to26.8 g g^-1 dw. Mean DDE concentrations in plasma ranged from 0.005 g g^-1 ww to 0.153 g g^-1 ww, and PCBs ranged from 0.006 g g^-1 ww to 0.092 g g^-1 ww. Mean Hg levels in red blood cells rangedfrom 0.056 g g^-1 dw to 0.25 g g^-1 dw. Concentrations of DDE, PCBs, or Hg, did not increasesignificantly with age, although the highestconcentrations of DDE and Hg were found in olderanimals. Overall, concentrations of DDE, PCBs, and Hgwere low and at levels that currently do not pose anythreat to health or survival of the ocelot. This isfurther supported by good reproduction of the ocelotin the LRGV, where adult females averaged about 1.5kittens/litter. Thus, it seems that the current majorthreat to recovery of the ocelot in the LRGV may behabitat loss, although potential impacts of newgeneration pesticides, such as organophosphorus andcarbamate insecticides need further study.     

高效富集——火焰原子吸收法测定清洁水中痕量铜,铅,锌,镉

采用高效富集技术，以火焰原子吸收法测定清洁水中痕量铜，铅，锌，镉，检测限分别为０．３，１．６，１．１和０．２ｍｇ／ｌ，精密度好，准确度高，满足日常分析要求。     

多道石墨炉原子光谱法同时测定水中的Cu,Pb,Zn,Cd

使用多道石墨炉原子吸仪,采用石墨管涂层处理技术,在对几种基体改进剂的改进作用进行实验比较的基础上,选择１％ＺｒＯＣｌ２为基体改进剂,对水中的Ｃｕ,Ｐｂ、Ｚｎ、Ｃｄ４种元素进行了同时测定,并应用此方法对北京化工二厂和京密引水渠的水样进行了加标回收试验,取得了较为满意的结果。     

新疆大芸中铀,钍,镭,^9^0锶,^1^3^7铯的含量

对新疆中草药大芸中铀、钍、镭、~(90)锶、~(137)铯进行了含量测定,取得数据结果,并与浙江茶叶、宁夏枸杞子中五种核素含量进行了对比,提供有关部分参考。     

市场经济条件下排污费征,管,用模式初探

对现行排污费征、管、用模式作了分析，认为现行模式存在严重不足，应尽快建立与市场经济相协调的排污费征、用模式。对所要建立的模式作了讨论。     

毛细管气相色谱法同时测定氯苯,硝基苯,硝基氯苯等

氯苯、硝基苯、硝基氯苯存在于多种工业废水中,排入水体后,可影响水的感官性状,并可通过呼吸道和皮肤进入人体,产生毒害作用引起神经系统、肝脏等疾病,被国家环保局列入“中国环境优先监测污染物黑名单”中,又同时作为“推荐近期实施的优先监测污染物”.采用气相色谱法分别分析氯苯或硝基苯的填充     

螯合树脂在线富集——火焰原子吸收光度法测定水中微量Cu,Pb,Zn,Cd

对螯合树脂在线富集，火焰原子吸收光度法进行了条件试验。试验证实方法对Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ４个元素检出浓度可达μｇ／Ｌ级，校准曲线性、样品重现性及准确度可满足测定要求。     

某铀矿工人头发中总α,总β,铀,钍放射性水平的调查

本文对某铀矿职业工人和非职业工人头发中的总β、总α放射性水平和铀、钍含量进行了分析测定.结果表明,该矿工人体内铀和钍的蓄积量均在正常放射性本底水平范围内,从头发中检验未观察到工人体内铀、钍放射性水平有明显的升高.