GB/T 15076.2-2019 in English

National Standard of the People's Republic of China GB/T 15076.2—2019

Chemical Analysis Methods for Tantalum Part 2: Determination of Tantalum Content by Inductively Coupled Plasma Atomic Emission Spectrometry and Chromatographic Separation Gravimetric Method

1. Standard Background and Technical Evolution

GB/T 15076 "Chemical Analysis Methods for Molybdenum Saw" is divided into 16 parts, and this part is Part 2. The main changes in the revision of the standard include: changing the determination method, expanding the determination range, adding sample clauses and precision clauses, and optimizing the reagent dosage and test report requirements.

2. Principle and scope of application of the method

2.1 Inductively coupled plasma atomic emission spectrometry (ICP-AES)

Inductively coupled plasma atomic emission spectrometerExcites the niobium element in the sample through argon plasma, determines the light intensity of its characteristic wavelength of 295.088 nm, and calculates the mass fraction of niobium. It is suitable for the determination of niobium content in tantalum and its compounds, and the determination range is $0.0010\% \sim 2.00\%$.

2.2 Chromatographic separation weight method

The paper chromatography separation technology is used to dissolve the sample with hydrofluoric acid and nitric acid, and niobium is separated from other elements by the developing agent, and the mass of niobium oxide is finally weighed. It is suitable for the determination of niobium content in tantalum and its compounds, and the determination range is $>2.00\% \sim 20.00\%$.

3. Comparison of standard frameworks

4. Implementation suggestions

Choose a method:Choose a suitable method based on the mass fraction of niobium in the sample. For trace analysis, ICP-AES is preferred; for high-content analysis, chromatographic separation weight method can be used.

Instrument calibration:Regularly calibrate the inductively coupled plasma atomic emission spectrometer to ensure wavelength accuracy and sensitivity stability.

Sample preparation:Strictly control sample particle size and drying conditions to avoid introducing impurities that affect the measurement results.

Blank test:Carry out a blank test with the sample to reduce system errors.