GB/T 31266-2014Determination of chloral content for superphosphorate (English PDF)
过磷酸钙中三氯乙醛含量的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 5, 2014
Implementation date
February 7, 2015
Scope
GB/T 31266-2014 is the English-translated version of 过磷酸钙中三氯乙醛含量的测定.
GB/T 31266-2014 is the Chinese standard "Determination of chloral content for superphosphorate". Its scope clause reads: This standard specifies the method for the determination of chloral SSP content. This standard applies to the determination of chloral SSP content.
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Document preview — GB/T 31266-2014
National Standard of the People's Republic of China
- ICS
- 65.080
- Classification
- G 20
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3.1 Principle
- 3.2 Reagents
- 3.3 Instrument
- 3.4 Analysis Steps
1 Scope
This standard specifies the method for the determination of chloral SSP content.
This standard applies to the determination of chloral SSP content.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
HG/T 2843 fertilizer products chemical analysis commonly used in standard titration solution, standard solution, reagent solution and indicator solution
Test Method 3
Warning. isopropanol flammable reagents, chloral with a pungent odor, test personnel should be suitably guarded. This standard does not indicate
All possible security issues, users have the responsibility to take appropriate safety and health practices and to ensure compliance with relevant national regulations condition.
This standard is used in the preparation of reagents, water and a solution, in the specifications and method of preparation is not specified, it shall comply with the provisions of HG/T 2843's.
3.1 Principle
Samples of chloral with isopropanol extraction, gas chromatography, Micro-Electron Capture Detector (ECD) for testing.
3.2 Reagents
3.2.1
isopropanol, pesticide grade.
3.2.2
chloral standard solution, 0.5mg/mL. Weigh 0.0500g equivalent chloral chloral hydrate (accurate to 0.0002g),
Dissolved in isopropanol, transferred to a 100mL volumetric flask, dilute to the mark with isopropanol, shake.
3.2.3
High-purity nitrogen.
3.3 Instrument
3.3.1
General laboratory equipment.
3.3.2
oscillator.
3.3.3 syringe filter
Preparation of the organic phase membrane pore size of 0.45µm.
3.3.4 Gas chromatograph
with Micro-Electron Capture Detector.
3.3.5 Micropipettes
20µL ~ 200µL, 100µL ~ 1000µL.
3.4 Analysis Steps
3.4.1 preparation of standard solution
Pipette 0µL respectively, 100µL, 200µL, 400µL, 800µL chloral standard solution in 50mL volumetric flask, dilute with isopropanol
Diluted to the mark, shake, isopropyl alcohol standard solution of chloral series, the concentration of this standard solution were 0µg/mL, 1µg/mL, […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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