SN/T 1732.14-2015Pyrotechnic composition used for fireworks and firecracker. Part 14: Determination of dextrin (English PDF)

Foreword

SN/T 1732 "Fireworks for Fireworks and Firecrackers" is divided into 19 parts.

--- Part 1. Determination of strontium content;

--- Part 2. Determination of dichromate content;

--- Part 3. Determination of zinc content;

--- Part 4. Determination of copper content;

---Part 5. Determination of titanium content;

--- Part 6. Determination of strontium content;

--- Part 7. Determination of lead content;

--- Part 8. Determination of sodium content;

---Part 9. Determination of magnesium content;

--- Part 10. Determination of sulfur content;

--- Part 11. Determination of potassium content;

--- Part 12. Determination of red phosphorus content;

--- Part 13. Determination of boric acid content;

--- Part 14. Qualitative detection methods for dextrin;

---Part 15. Method for the detection of polyvinyl chloride;

---Part 16. Determination of picric acid - High performance liquid chromatography;

---Part 17. Method for the determination of hexachlorobenzene; gas chromatography;

---Part 18. Method for the detection of chlorinated paraffin;

--- Part 19. Detection method of gallic acid - High performance liquid chromatography.

This part is the 14th part of SN/T 1732.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This part is proposed and managed by the National Certification and Accreditation Administration.

This section drafted by. Hunan Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.

1 Scope

This part of SN/T 1732 specifies the method for detecting dextrin in fireworks and pyrotechnics.

This section applies to the qualitative detection of dextrin in fireworks and pyrotechnics.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 6682 Analytical laboratory water specifications and test methods GB/T 15813 Fireworks and firecracker molding agent sample separation and crushing

3 Terms and definitions

The following terms and definitions apply to this document.

Dextrin

An incomplete hydrolysis product of starch, which is a yellow or white amorphous powder.

4 Method summary

The dextrin in the pyrotechnic drug sample is dissolved in hot water, and qualitatively determined by the color development system method in which iodine is blue-violet or purple-red.

5 Reagents and materials

All reagents are of analytical grade unless otherwise specified. The water used meets the requirements of Class I water in GB/T 6682.

5.1 Dextrin standard.

5.2 Potassium iodide.

5.3 Elemental iodine.

5.4 Preparation of iodine solution. Weigh 1.4g of solid iodine reagent (5.3) and 3.6g of potassium iodide (5.2) reagent, dissolve in water and dilute to volume 100mL, shake well, and store in the dark.

6 Instruments and equipment

6.1 Analytical balance.

6.2 Glass test tube. 5mL.

6.3 Electric furnace.