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XB/T 601.3-2008: Chemical analysis methods of lanthanum boride - Determination of tungsten content - Inductively coupled plasma atomic emission spectrographic method
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Chemical analysis methods of lanthanum boride - Determination of tungsten content - Inductively coupled plasma atomic emission spectrographic method
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XB/T 601.3-2008
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Basic data | Standard ID | XB/T 601.3-2008 (XB/T601.3-2008) | | Description (Translated English) | Chemical analysis methods of lanthanum boride - Determination of tungsten content - Inductively coupled plasma atomic emission spectrographic method | | Sector / Industry | Rare Earth Metal Industry Standard (Recommended) | | Classification of Chinese Standard | H65 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 7,795 | | Date of Issue | 2008-02-01 | | Date of Implementation | 2008-07-01 | | Regulation (derived from) | NDRC Announcement No. 11 of 2008; Ministry of Industry and Information Technology Announcement No. 23 of 2017 | | Issuing agency(ies) | National Development and Reform Commission of the People's Republic of China | | Summary | This standard specifies the determination method of tungsten content in lanthanum hexaboride. This standard applies to the determination of tungsten content in lanthanum hexaboride. Measuring range: 0.0010%��0.10%. | XB/T 601.3-2008: Chemical analysis methods of lanthanum boride - Determination of tungsten content - Inductively coupled plasma atomic emission spectrographic method
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Chemical analysis methods of lanthanum boride-Determination of tungsten content-Inductively coupled plasma atomic emission spectrographic method
Book People's Republic of China Rare Earth Industry Standard
XB/T 601.3-2008
Chemical analysis method of lanthanum hexaboride
Determination of tungsten content
Inductively coupled plasma emission spectroscopy
2008-02-01 released
Implementation of.2008-07-01
Issued by the National Development and Reform Commission of the People's Republic of China
Foreword
This standard is divided into the following 5 parts.
XB/T 601.1-2008 Methods for chemical analysis of lanthanum hexaboride. Determination of boron content. Acid-base titration
XB/T 601.2-2008 Methods for chemical analysis of lanthanum hexaboride Determination of iron, calcium, magnesium, chromium, manganese, and copper content inductively coupled plasma
Emission spectroscopy
XB/T 601.3-2008 Methods for chemical analysis of lanthanum hexaboride-Determination of tungsten content-Inductively coupled plasma emission spectrometry
XB/T 601.4-2008 Methods for chemical analysis of lanthanum hexaboride. Determination of carbon content. High frequency induction combustion and infrared absorption method.
XB/T 601.5-2008 Methods for chemical analysis of lanthanum hexaboride-Determination of acid-soluble silicon content-Silicon molybdenum blue spectrophotometric method
This part is part 3.
This part was proposed and managed by the National Rare Earth Standardization Technical Committee.
This part was drafted by Hunan Rare Earth Metal Materials Research Institute.
This part was drafted by Baotou Rare Earth Research Institute and Beijing Nonferrous Metal Research Institute.
The main drafters of this section. Cheng Guoqing, Liu Rongli, Weng Guoqing.
Participating drafters of this section. Siqin Gaowa, Cui Aiduan, Shao Rongzhen, Yang Ping.
XB/T 601.3-2008
Chemical analysis method of lanthanum hexaboride
Determination of tungsten content
Inductively coupled plasma emission spectroscopy
1 scope
This section specifies the determination method of tungsten content in lanthanum hexaboride.
This section applies to the determination of tungsten content in lanthanum hexaboride. Measurement range. 0.0010% to 0.10%.
2 Principles of the method
The sample is dissolved in nitric acid, tungsten is complexed with hydrofluoric acid, and the lanthanum matrix is separated at the same time. Boric acid remains in the sample solution. The matrix matching method is used to match the background.
The subtraction method eliminates the influence of the matrix, and is determined by argon plasma spectrometry.
3 Reagents
3.1 Nitric acid (ρ1.42g/mL).
3.2 Hydrofluoric acid (ρ1.14g/mL).
3.3 Tungsten standard storage solution. Weigh 0.1261g tungsten trioxide ((WO3) >99.9%, dried at 110°C for 1h), and place it in.200mL
In the beaker, add 1g of sodium hydroxide and a little water, heat to dissolve it until it is clear, then transfer it to a 100ml volumetric flask after cooling, dilute to the mark with water, and mix
uniform. 1mL of this solution contains 1,000 mg of tungsten. Store in a plastic bottle.
3.4 Tungsten standard solution. Pipette 10.00mL tungsten standard stock solution (3.3) into a 100mL volumetric flask, add 2mL hydrofluoric acid
(3.2) Dilute to the mark with water and mix well. This solution 1mL contains 100μg of tungsten. Store in a plastic bottle.
3.5 Tungsten standard solution. Pipette 10.00mL tungsten standard solution (3.4) into a 100mL volumetric flask, add 2mL hydrofluoric acid (3.2);
Dilute to the mark with water and mix well. This solution 1mL contains tungsten 10.0μg. Store in a plastic bottle.
3.6 Boric acid solution (50g/L).
3.7 Argon gas. purity > 99.99%.
4 Instruments
4.1 Inductively coupled plasma emission spectrometer. the reciprocal line dispersion rate is not more than 0.25nm/mm.
4.2 Light source. Argon plasma light source. The use power is not more than 2kW.
5 Sample
The sample is mixed and dried at 105°C to 110°C for 1 h, then cooled to room temperature in a desiccator and weighed immediately.
6 Analysis steps
6.1 Sample
Weigh 0.5g sample (5) to the nearest 0.0001g.
6.2 Determine the quantity
Weigh two samples, measure in parallel, and take the average value.
6.3 Preparation of analysis test solution
Place the sample (6.1) in a.200mL polytetrafluoroethylene beaker, add 5mL of water to wet the sample. Slowly add nitric acid dropwise while shaking
XB/T 601.3-2008
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