General Provisions Standard for Manufacturing and
Preparation General Standards for Food
Additive use in Foods Specification and Standards General Test Methods Reagent, Solution, Standard Solution
for Quantitative Analysis and
Standard Solution Appendix
Name
Content
Definition
Description
Identification
Purity
Assay
Permitted Use Level
All
1. Gas Chromatography
2. Residue on Ignition
3. Loss on Drying and Loss on Ignition
4. Refractive Index
5. Lead Limit Test (Dithizone Method)
6. Methoxyl Determination
7. Thin Layer Chromatography
8. Quantitative Test for Generated Gas
9. Arsenic Limit Test
10. Boiling Point and Amount of Distillate
11. Specific Gravity
12. Optical specific rotation
13. Water Determination (Karl Fischer Method)
14. Paper Chromatography
15. Softening Point Measurement
16. Flame Coloration Test
17. Test Methods for Chloride and Sulfate Slats
18. Thermometers
19. Atomic Absorption Spectrophotometry
20. Assay for Alkali Salt of Organic Acid
21. Melting Point
22. Congealing Point
23. Infrared Spectrophotometry
24. Viscosity
25. Heavy Metal Limit Test
26. Nitrogen Determination
27. pH Determination
28. Identification
29. Readily carbonizable substances test
30. Ash and Acid-Insoluble Ash Limit Test
31. Spectrophotometry
32. Pigment Test Methods
33. Coloring Matter Aluminum Lake Test
34. Flavoring Substances Test
35. Oils Test
General Test Methods > Test Methods for Chloride and Sulfate Slats

17. Test Methods for Chloride and Sulfate Slats


This method is used to test the allowed limit of chlorides or sulfates in a sample

A. Chloride Limit Test
Unless otherwise specified, a specified amount of sample is dissolved in approximately 30 ml of water in a Nestler tube. If the solution is alkaline, it is neutralized with dilute nitric acid and then 6 ml of dilute nitric acid is added. It is then diluted with water to 50 ml. If it is specified to use a test solution, it is diluted to 50 ml with water in a Nestler tube. In another Nestler tube, a specified amount of 0.01 N hydrochloric acid is added, where 6 ml of nitric acid and water are added to bring the total volume to 50 ml. If the solution is not clear, both solutions are filtered under the same conditions. To both solutions, 1 ml each of silver nitrate solution is added and well mixed. While avoiding the direct sunlight, the mixtures are set aside for 5 minutes. Both tubes are compared in terms of turbidity with a black background.

B. Sulfate Limit Test
Unless otherwise specified, a specified amount of sample is dissolved in approximately 30 ml of water in a Nestler tube. If the solution is alkaline, it is neutralized with dilute hydrochloric acid and then 1 ml of dilute hydrochloric acid is added. It is then diluted with water to 50 ml. If it is specified to use a test solution, it is diluted to 50 ml with water in a Nestler tube. In another Nestler tube, a specified amount of 0.01N sulfuric acid is added, where 1 ml of hydrochloric acid and water are added to bring the total volume to 50 ml. If the solution is not clear, both solutions are filtered under the same conditions. To both solutions, 2 ml each of barim chloride solution is added, well mixed, and set aside 10 minutes. Both tubes are compared in terms of turbidity with a black background.