GB/T 10514-2012Determination of free water for nitrophosphate - Oven method (English PDF)

Foreword

This standard rule according to GB/T 1.1-2009 given draft.

This standard is one nitrate fertilizer, P and K series of standard test methods for nitrate, which are listed below national standards.

--- GB/T 10511-2008 "After distillation of total nitrogen content for nitrophosphate titration method";

--- GB/T 10512-2008 "nitrate fertilizer phosphorus content - Quinoline phosphomolybdate gravimetric method";

--- GB/T 10513-2012 "nitrophosphate determination of water content Karl Fischer method";

--- GB/T 10515-2012 "Determination of particle size Nitrophosphates";

--- GB/T 10516-2012 "nitrate fertilizer particles have an average crush strength of determination." This standard replaces GB/T 10514-1989 "nitrophosphate determination of water content - Oven method." The standard proposed by China Petroleum and Chemical Industry Association.

1 Scope

This standard specifies the determination of P and K fertilizer nitrate, free water content by oven method.

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

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this File. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 10511-2008 After distillation of total nitrogen content for nitrophosphate titration

3 Principle

At a temperature in the sample mass loss was dried 2h free moisture content.

4 Instrument

4.1 usually laboratory instruments.

4.2 Electric oven. temperature can be controlled at (100 ± 2) °C;

4.3 weighing bottle. with a ground cover, diameter 50mm, height 30mm.

5 Steps

Do two parallel determination of sample. According to GB/T 10511-2008 provisions 6.1 Preparation of samples.

Weigh about 2g sample (accurate to 0.0002g) in advance at (100 ± 2) °C dried to constant weight weighing bottle and placed electric heated dry Dry box, weighing bottle thermometer mercury ball should be placed close to the horizontal position, until the temperature reaches (100 ± 2) °C, the dried 2h, removed, placed in Cool to room temperature in a desiccator, and weigh.

6 Expression analysis