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standard samples
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    This article applies correctional matrix calculation to single-point pH complexometry for determination of Ni,Cu,Co contents in nickel minerals simultaneously and the article discusses method principle,determination of appointed pH,institution of constant matrix,Seven mixed samples and mineral samples and concentrate standard samples are determined and satisfactory results are obtained.
    将校正矩阵计算法用于单点pH络合滴定法中,同时测定了镍矿中Ni,Cu,Co含量。 讨论了方法原理,指定pH值的选择及常数矩阵的建立。
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    The recoveries for these elements were (99.0%~)102.0% with precision of less than 1.19% RSD(n=5). The method has been applied to the determination of these elements in the standard samples and the results are in agreement with certified values.
    加标回收试验的回收率为99.00%~102.00%,样品5次测定的RSD小于1.19%。
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  standard samples
A method is developed for the separate determination of aluminum and beryllium using cellulose as the support; the method was used for the analysis of real samples and tested with standard samples.
      
IUPAC Recommendations for Reference Standard Samples in pH Measurements
      
Designing of Standard Samples for Determining the Sensitivity of Eddy-Current Devices to the Metal Inclusion Content in a Parama
      
The reasons of the wide propagation and the high effectiveness of using standard samples of magnetically soft materials are explained.
      
A numerical analysis of these errors is performed using standard samples as examples.
      
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This article describes the apparatus introduced wholly from NSC. Japan for testing the high temperature properties of iron ore. Its performance, operating method and accuracy management have been stated. Through more than three years' practice, the following facts can be confirmed: the apparatus is well performed, it can meet the requirements in the Bao steel's production, and the (?) management chart, the selfdeveloped internal controlled standard samples and strick control of impurities in the reducing...

This article describes the apparatus introduced wholly from NSC. Japan for testing the high temperature properties of iron ore. Its performance, operating method and accuracy management have been stated. Through more than three years' practice, the following facts can be confirmed: the apparatus is well performed, it can meet the requirements in the Bao steel's production, and the (?) management chart, the selfdeveloped internal controlled standard samples and strick control of impurities in the reducing atmosphere are effective measures to increase the testing accuracy. The results obtained can be used for operation guide in producing qualified sinters.

本文着重介绍了由日本新日铁全套引进的铁矿石高温性能检验装置的设备性能、操作方法和精度管理。经过三年多生产实践的考核,确认该装置性能良好,能满足宝钢生产的需要。同时采用X管理图,自制内控标样及严格控制还原气中杂质含量是提高试验精度的有效措施,这对于提高烧结矿的质量和稳定烧结生产起到了一定的指导作用。

n this paper,the correction matrix ele-ments were discussed and criteria of select-ing standards were established in the analy-sis of iron ores with X-ray fluorescence spec-trometry,The suitable standard samples ofiron mineral can be automatically selectedfrom a large amount of standards by a com-piled program.Pressed powder pellet tech-nique was used for sample praparation. Thedeveloped method is simple,rapid and theaccurate and precision,satisfies the demandsfor production.

本文对XRF法分析铁矿的基体校正元素进行了研究,并建立了标准选择判据,编制的计算软件可以自动地从大量标样中选择适合该样品分析的标准。该法可用于粉末压片制样的分析,方法快速,准确度和精密度均符合生产要求。

This article applies correctional matrix calculation to single-point pH complexometry for determination of Ni,Cu,Co contents in nickel minerals simultaneously and the article discusses method principle,determination of appointed pH,institution of constant matrix,Seven mixed samples and mineral samples and concentrate standard samples are determined and satisfactory results are obtained.

将校正矩阵计算法用于单点pH络合滴定法中,同时测定了镍矿中Ni,Cu,Co含量。讨论了方法原理,指定pH值的选择及常数矩阵的建立。对7个自配样和镍精矿标样进行了测定,均获得满意结果。

 
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