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laser fluorimetric
相关语句
  激光荧光法
     Laser Fluorimetric Determination of Trace Uranium in Geological Samples
     激光荧光法测定地质样品中痕量铀
短句来源
     The fluorescence-enhancing agents YZ-Ⅰ and YZ-Ⅱ, which consist mainly of sodium pyrophosphate and polyphosphate respectively, for the laser fluorimetric determination of trace uranium are studied and the detection limit of uranium by using YZ-Ⅰ or YZ-Ⅱ in conjunction with the UA-3 uranium analyser reached 0.002 ppb.
     本文提出了用于激光荧光法测定痕量铀的两种荧光增强剂 YZ-Ⅰ和YZ-Ⅱ,拟定了 TBP萃取-激光荧光测定痕量铀的方法。
短句来源
     The fluorescence-enhancing agents XPY and XB Y were studied for use in the laser fluorimetric determination of trace uranium.
     作者研制了XPY和XBY两种荧光增强试剂,用于激光荧光法测定地质样品中痕量铀。
短句来源
  相似匹配句对
     Laser time Resolved fluorimetric Determination of Cadmium.
     镉的激光时间分辨荧光测定
短句来源
     Laser-time Resolved Fluorimetric Determination of Selenium (Ⅳ)
     硒的激光-时间分辨荧光分析
短句来源
     Laser and It's Application
     激光(laser)及其应用
短句来源
     Laser cutting
     激光切割
短句来源
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  laser fluorimetric
A simple sample decomposition and laser fluorimetric determination of uranium at trace level is reported in certain refractory minerals, like ilmenite, rutile, zircon and monazite; environmental samples viz.
      
Preliminary indications are that laser fluorimetric analysis will be useful in characterization of sorption of gadolinium.
      


The fluorescence-enhancing agents YZ-Ⅰ and YZ-Ⅱ, which consist mainly of sodium pyrophosphate and polyphosphate respectively, for the laser fluorimetric determination of trace uranium are studied and the detection limit of uranium by using YZ-Ⅰ or YZ-Ⅱ in conjunction with the UA-3 uranium analyser reached 0.002 ppb. Linear corelation existed, extending through five orders of magnitude, with a precision of less than ± 5 % for a uranium content of more than 0.1 ppb. The uranium contents in aqueous solutions,...

The fluorescence-enhancing agents YZ-Ⅰ and YZ-Ⅱ, which consist mainly of sodium pyrophosphate and polyphosphate respectively, for the laser fluorimetric determination of trace uranium are studied and the detection limit of uranium by using YZ-Ⅰ or YZ-Ⅱ in conjunction with the UA-3 uranium analyser reached 0.002 ppb. Linear corelation existed, extending through five orders of magnitude, with a precision of less than ± 5 % for a uranium content of more than 0.1 ppb. The uranium contents in aqueous solutions, including riverwater, lake water, groundwater, seawater etc. are determined by using YZ-Ⅰ or YZ-Ⅱ without separation of the foreign ions and pre-concentration of uranium.The TBP extraction-laser fluorimetric method for the determination of trace uranium is developed and reported. One determination lasted 3 minuets only. Among the 18 ions tested, 13 cations and anoins don't interfere the determination of uanium when their amounts is 107 times that of uranium. This method can therefore be used for samples containing a great quantity of interfering species.

本文提出了用于激光荧光法测定痕量铀的两种荧光增强剂 YZ-Ⅰ和YZ-Ⅱ,拟定了 TBP萃取-激光荧光测定痕量铀的方法。测铀检测限0.002ppb,标准曲线的线性工作范围达五个数量级,当铀浓度>0.1ppb时,分析精度<±5%,此两种试剂对许多干扰杂质有很强的掩蔽能力。TBP萃取-激光荧光法可用于含多种、大量杂质的样品分析。

The fluorescence-enhancing agents XPY and XB Y were studied for use in the laser fluorimetric determination of trace uranium. Influences of pH, temperature and impurity ions on fluorescence we-ie studied. Detection limit of uranium reaches 0.006 ng/ml. A linear correlation extends from 0. 0x ng/ml to 1000 ng/ml.As low as 0.01 ppm uranium in geological samples can be determined after acid decomposition. The method has been used for determining U in GSD 1-8, plant, hair and groundwate- samples. The results...

The fluorescence-enhancing agents XPY and XB Y were studied for use in the laser fluorimetric determination of trace uranium. Influences of pH, temperature and impurity ions on fluorescence we-ie studied. Detection limit of uranium reaches 0.006 ng/ml. A linear correlation extends from 0. 0x ng/ml to 1000 ng/ml.As low as 0.01 ppm uranium in geological samples can be determined after acid decomposition. The method has been used for determining U in GSD 1-8, plant, hair and groundwate- samples. The results were satisfactory.

作者研制了XPY和XBY两种荧光增强试剂,用于激光荧光法测定地质样品中痕量铀。荧光增强剂不仅对铀有荧光增强作用,而且使测定体系具有较强的抗干扰能力。经验证对岩石样品中的铀的检出下限为0.01ppm。能满足岩石矿物中痕量铀的测定要求。

In this paper,a simple and highly sensitive laser fluorimetric system is described,and the value of time discrimination for suppressing unwanted signals and decreasing the minimum detectable concentration is demonstrated. It is confirmed that time discrimination is very useful for ultratrale determination of fluorescent complex.This technique is successful with the combined use of a pulsed laser and a pulse gate signal detection system for samarium complex. The linear range and the detectin limit...

In this paper,a simple and highly sensitive laser fluorimetric system is described,and the value of time discrimination for suppressing unwanted signals and decreasing the minimum detectable concentration is demonstrated. It is confirmed that time discrimination is very useful for ultratrale determination of fluorescent complex.This technique is successful with the combined use of a pulsed laser and a pulse gate signal detection system for samarium complex. The linear range and the detectin limit of the method are 0 01—10μg/ml and 3 3ng/ml,respectively.The RSD for Sm 3+ (0 5μg/ml)(n=12) is 3 7%.The method was used to detemine samarium in rare earth mixtures.The recovery was in the range of 90 0—110 0%,and the mean recovery was 101 4%(n=6)。

本文利用Sm-TTA-EtOH液体荧光体系,采用时间分辨激光荧光检测手段,建立了钐的时间分辨激光荧光分析法。该法的线性范围为0.01~10μg/ml,检出限为3.3ng/ml。0.5μg/ml钐标样测定的相对标准偏差为3.7%(n=12)。结合混合稀土中多种元素共存的特点,实验确定了装置的有关参数。用标准加入方法对实际样品进行了测定,并与其他方法测定结果进行了比较,结果满意。本法测定实际样品中钐的相对标准偏差小于7%。

 
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