GB/T 10512-2008Determination of phosphorus content for nitrophosphate - Quinoline phosphomolybdate gravimetric method (English PDF)

1 Scope

This standard specifies the determination of quinoline phosphomolybdate gravimetric method nitrate fertilizer, the phosphorus content of phosphorus and potassium nitrate.

This standard applies to all kinds of technology, the nitrate fertilizer, water solubility of phosphorus and phosphorus content of phosphorus and potassium nitrate.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 10511-2008 nitrophosphate total nitrogen content after distillation titration

HG/T 2843 fertilizer products chemical analysis commonly used in standard titration solution, standard solution, reagent solution and indicator solution

Principle 3

Water and disodium EDTA solution was extracted nitrate fertilizer, water-soluble phosphorus Phosphorus Potassium nitrate and phosphorus, phosphate extracts CKS Ion in acidic medium to form a yellow phosphomolybdic acid reagent and Quimociac quinoline precipitation, determination of phosphorus using quinoline phosphomolybdate gravimetric method.

4 Reagents and materials

The following part-corrosive reagents and solutions, the operator should be careful! If splashed on skin, immediately wash with water, severe cases should

Immediate treatment.

The standard reagent preparation, and water solution used in the method of preparation and specifications are not specified, shall comply with HG/T 2843 stipulated.

5 Instruments