Preparation of steel substrates before application of paints and related products—Tests for the assessment of surface cleanliness—Part5: Measurement of chloride on surfaces prepared for painting(ion detection tube method)
1 Scope
This part of GB/T 8570 specifies the Karl Fischer method for the determination of the water content of liquefied anhydrous ammonia.
This part is applicable to liquefied anhydrous ammonia products with water content not less than 0.005 0 %.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 8570. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part of GB/T 8570. However parties to agreements based on this part of GB/T 8570 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 6283 Chemical Products - Determination of Water - Karl Fischer Method (GB/T 6283-2008, ISO 760: 1978, NEQ)
GB/T 8570.1 Determination of Liquefied Anhydrous Ammonia - Part 1: Taking a Laboratory Sample
GB/T 8570.3-2010 Determination of Liquefied Anhydrous Ammonia - Part 3: Residue Content - Gravimetric Method
HG/T 2843 Chemical Fertilizer Products - Standard Volumetric, Standard, Reagent and Indicator Solutions for Chemical Analysis
Foreword i
1 Scope
2 Normative References
3 Principle
4 Reagents and Materials
5 Apparatus
6 Sampling
7 Analysis Procedures
8 Expression of Analysis Result
9 Permissible Deviation
