This part of GB/T 8570 specifies two methods for the determination of the oil content not volatile at about 105 ℃, of liquefied anhydrous ammonia, namely gravimetric method and infra-red method.
When the oil content determined via gravimetric method is less than 5 mg/kg, “less than 5 mg/kg” shall be reported as the determination result, or it shall be determined via infra-red method.
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 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
GB/T 8570.4 Determination of Liquefied Anhydrous Ammonia - Part 4: Residue Content - Titrimetric Method
HG/T 2843 Chemical Fertilizer Products - Standard Volumetric, Standard, Reagent and Indicator Solutions for Chemical Analysis
3 Principle
GB/T 8570.6-2010 The following standards are cited：
GB/T 8570.6-2010 Cited by the following standards：
