JC/T 618-2019 Methods of chemical analysis of thermal insulation materials for leachable chloride, fluoride, silicate, sodium ions ENGLISH PDF
1 Scope
This standard specifies the test conditions, specimen preparation, test solution preparation, blank test, determination method, precision, and test report for the determination of soluble chlorides, fluorides, silicates, sodium ions, and leaching solution pH in insulation materials.
This standard is applicable to the determination of soluble chloride, fluoride, silicate, sodium ion and leaching solution pH of thermal insulation materials covering austenitic stainless steel, such as mineral wool and its products, calcium silicate, composite silicate, expanded perlite, foam asbestos, foam glass, aerogel thermal insulation products, thermal insulation and fire retardant coatings, and also applicable to the determination of soluble chloride, fluoride, silicate, sodium ion and leaching solution pH of thermal insulation materials for other purposes.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 602 Chemical reagent - Preparations of standard solutions for impurity
GB/T 6682 Water for analytical laboratory use - Specification and test methods
3 Test conditions
3.1 The specimen shall be stored and dried in a pollution-free environment.
3.2 The equipment and tools used shall be free from chloride, fluoride, silicate, sodium ions, and acid-base contamination.
3.3 The specifications of analytical water shall not be lower than the requirements of first grade water specified in GB/T 6682, and the chloride ion content shall be less than 0.01 mg/L; the reagents used shall be analytical grade or above, and the standard solution shall be prepared according to GB/T 602.
4 Preparation of specimen
Contents
Foreword i
1 Scope
2 Normative references
3 Test conditions
4 Preparation of specimen
5 Preparation of test solutions
6 Blank test
7 Determination method
8 Accuracy
9 Test report
Annex A (Informative) Calibration of dilute silver nitrate standard titration solution by potentiometric titration apparatus
Annex B (Informative) Preparation of silver-silver sulfide electrode
