1 Scope
This standard specifies the requirements and methods for determining metal and nonmetal impurities in chemical reagents by inductively coupled plasma atomic emission spectrometry.
This standard is applicable to direct injection of liquid test samples containing various impurities in chemical reagents or test solutions after removal of matrix, and determination by inductively coupled plasma atomic emission spectrometer. This standard is not applicable to solid injection.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 602 Chemical reagent - Preparations of standard solutions for impurity (GB/T 602-2002; ISO 6353-1: 1982, NEQ)
GB/T 4470 Analytical spectroscopic methods - Flame emission, atomic absorption and atomic fluorescence - Vocabulary
GB/T 4842 Argon
GB/ T 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-2008; ISO 3696: 1987, MOD)
JJG 768 Verification regulation of emission spectrometer
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3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 4470 and the following apply.
3.1
high frequency generator
high-frequency power source which provides high-frequency energy for the coupling coil and the plasma
3.2
plasma torch
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Determination
8 Recovery rate
9 Safety precautions
Annex A (Normative) Quartz sub-boiling distillation device
Annex B (Normative) Preparation of multi-element standard solution
Annex C (Informative) Wavelength of analytical spectral lines of elements under determination
Annex D (Normative) Determination method for detection limit
