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根据胶体光学吸收行为研究Zn~(2+)-S~(2-)胶体反应测定Zn~(2-)双波长新光度分析方法。该方法简单方便、曲线稳定、精密度(RSD)<3%,加标回收率为93%~103%,检出限:0.3mg/L.适合于0~10.0μg/ml天然水测定。 相似文献
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采用加速溶剂萃取处理土壤样品,用超高效液相色谱串联质谱法测定样品中15种氨基甲酸酯类农药残留,方法在5.00μg/L~200μg/L范围内线性良好,检出限为0.3μg/kg~0.5μg/kg,加标回收率为78.9% ~116%,6次测定结果的RSD为0.7% ~15.7%.试验表明:不同地域的6种标准土壤对15种目标物... 相似文献
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深圳主要河流中雌激素污染调查 总被引:1,自引:0,他引:1
调查了深圳市10条主要河流雌激素污染现状,结果表明,双酚A在深圳市河流中28个监测点中27个点有检出,检出率96.4%,质量浓度为未检出~6.042 μg/L;17β雌二醇(E2)在深圳市河流中28个监测点中8个点有检出,检出率28.6%,质量浓度为未检出~0.011 6μg/L,能检出的17β雌二醇(E2)值大都在0.001 5μg/L~0.003 9 μg/L之间;雌三醇(E3)仅在1个监测点(新洲河河口)有检出,对壬基酚均未检出. 相似文献
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采用固相萃取超高效液相色谱串联质谱法(SPE-UPLC-MS/MS)同时测定地下水中涕灭威、克百威、2,4滴和五氯酚等4种农药残留,通过优化试验条件,使方法在10.0μg/L~200μg/L范围内线性良好,检出限为0.003μg/L~0.006μg/L.标准溶液低、中2个质量浓度水平的加标回收率为84.1% ~98.8... 相似文献
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采用二氯甲烷提取地表水,浓缩后经超高效液相色谱紫外-三重四级杆质谱检测器联用测定甲萘威。试验表明:紫外检测器测定甲萘威,在2.00μg/L~500μg/L范围内线性良好,相关系数为0.9992,检出限为0.500μg/L;三重四级杆质谱检测器测定甲萘威,在0.100μg/L~200μg/L范围内线性良好,相关系数为0.9990,检出限为0.009μg/L;实际水样3个浓度水平的加标回收率为92.4%~98.4%,RSD为2.5%~6.5%。该方法中双检测器联用测定地表水加标样品,使得定性定量更加准确。 相似文献
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在醋酸醋酸钠缓冲溶液中,铅与邻菲绕啉,硒的络合物。在单扫描示波极谱仪(JP-2型)上,于-0.55伏出现一个灵敏的吸附波。底液最佳浓度:0.15MHAC-0.35MNaAC,0.00015~0.0005%。邻菲统啉,0.5-1.25μgSc~(4+)/ml.其波高与铅含量在0~2μg/ 10ml间成比例.检出限为0.001μg·ml~(-1)。大量钾、钠、铵,2mg钙、镁、铬、钡及一定量金属离子、非金属离子不影响铅的测定。该法已用于地表水中痕量铅的测定,方法简单快速准确。 相似文献
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气相色谱-质谱法测定饮用水中消毒副产物卤代腈 总被引:1,自引:0,他引:1
采用顶空加盐气相色谱-质谱法检测饮用水中的消毒副产物氯乙腈、二氯乙腈和三氯乙腈,并对样品前处理方法及GC/MS仪器条件进行优化,使得3种卤代腈在5.00μg/L ~80.0μg/L 范围内线性良好,方法检出限分别为2.52μg/L、1.02μg/L和1.57μg/L。空白水样的加标回收率为75.9%~94.1%, RSD为3.6%~6.2%。 相似文献
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在pH4.5~7醋酸—醋酸钠缓冲溶液和SDS存在下,Fe(Ⅱ)与5—Cl—PADAB形成1:2紫红色络合物,最大吸收波长为530nm,表观摩尔吸光系数为6.0×10~4l/mol·cm,线性范围为0~25μg Fe(Ⅱ)/25ml。 相似文献
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本文对目前国内所使用和已提出讨论的校准曲线回归计算方法与国际标准校准曲线回归计算方法进行了比较和讨论,表明无论采用何种回归方法进行计算,对测定结果的精密度和准确度均无显著影响。但为了使校准曲线的回归计算方法国际化、标准化,建议采用国际标准回归法。 相似文献
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原730铀矿周围环境,受到了一定程度的放射性污染,其牧草中的总α放射性比活度及铀、镭-226含量均明显高于对照区,但对该矿区周围草食动物的肉、奶剂量的估算,未超过国家食品中放射性物质限制标准,可以食用。 相似文献
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The transboundary River Nestos in the Balkan Peninsula is a surface water resource shared by Hellas and Bulgaria. The Public Power Corporation of Hellas (DEH) proceeded to the dams' construction of Thesaurus in 1997 and Platanovrissi in 2000, to satisfy the increased needs for power
production and irrigation in the Regions of Eastern Macedonia and Thrace in the Hellenic Territory. DEH following the Ministerial
Agreement of the Hellenic Parliament ‘`KYA 18492/19—09—1996’' funded a series of Research Projects concerned on the monitoring
of the water quantity and quality data of Nestos from the Hellenic-Bulgarian borders to its estuaries in the Thracian sea.
‘`PERSEAS’' Research Group from Aristotle University of Thessaloniki, carried out the research, design, construction, installation,
operation and maintenance of the ‘`R.E.MO.S.’' (Remote Environmental MOnitoring System) networks. Three REMOS networks have
been installed in the areas of (a) the River Nestos deltaic channel, (b) Thesaurus dam-lake in the intramountainous valley
and (c) Potamoi (Despat) and Pagoneri (Nestos) villages close to the borders between Hellas and Bulgaria. They record water
level (H), water and air temperature (T), water conductivity (ECw), Redox potential (RP) and dissolved oxygen (DO) on a 24h
basis, since the beginning of the year 2000. The research carried out in this paper, is focused on the REMOS station in the
final course of Nestos in the deltaic area. The continuous monitoring and the data analysis yield useful results for the quality
and quantity of the hydrologic regime of Nestos after the dams' construction, as well as for the trends detected of the quality
parameters (ECw, RP and DO) and the water level, using the nonparametric Spearman's criterion. The best fitted model of time
trend, for each variable, was chosen. The statistical sample of each one of the quality variables consisted of about 1000
values based on daily measures on a three years monitoring program (1/1/2000—31/12/2002). Further research and analysis for
the other network stations of REMOS should provide useful results for the sustainable management of the transboundary River
Nestos. 相似文献