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在pH10.4~11.1碱性溶液中钙离子与紫尿酸铵生成橙红色的稳定络合物.络合物最大吸收峰为500nm,显色后络合物可稳定2时.钙量在2.50~25.0(μg/50ml)范围内符合比耳定律,表观摩尔吸光系数为1.2×10~4L/mol·cm.桑德尔灵敏度为0.003μg/cm~2,方法加标回收率为94%~104%. 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
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模糊数学法在回顾性环境影响评价中的应用研究 总被引:5,自引:0,他引:5
应用模糊综合判别的方法,将工程对影响的多重因素进行综合分析评判,并结合胜利发电厂一期工程的大气回顾性环境影响评价对该方法实用性进行研究探讨。 相似文献
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通过对伊犁地区部分矿泉水水质分析,展示了该地区矿泉水中微量元素含量及其分布的特点,为今后开发和利用水地区的矿泉资源提供了一定的科学依据. 相似文献
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对学校环境噪声作了初步调查表明:学校环境噪声主要污染源来自交通噪声,危害最大的是位于交通干线两侧的学校.上课时间能持续在64.5~66.9dB(A)之间的较高水平.其噪声污染与距噪声源距离呈负相关(r=-0.679). 相似文献
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本文研究了水中痕量铍的稳定性大小,与水中酸度、与水中存在的沉淀物种类及量以及与贮存容器有关,为了使标准溶液与水样中痕量铍不致因容器表壁吸附或沉淀物吸附而损失,经试验采用聚乙烯瓶盛装最好,并用盐酸或硝酸调至溶液酸度为pH1-2为好。 相似文献
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本文报道了一种阴极溶出伏安法测定硫脲的新方法。在乙二胺介质中,于-0.76V处出现硫脲峰电流.在PH11的条件下可获得很高的灵敏度。电富集10分钟便可测出0.05PPb(6.57×10~(-10)mol/L)的硫脲.硫脲在1~1000PPb浓度范围内呈良好的线性关系.此法可用了废水中痕量硫脲的测定。 相似文献
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就《工业企业厂界噪声测量方法》用干扰民噪声实际测量时,在测量时间、测量位置等方面存在的不足,进行了探讨。 相似文献