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GB/T 13025.3-2012: General test method in salt industry -- Determination of moisture
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 13025.3-2012	English	149	Add to Cart	2 days [Need to translate]	General test method in salt industry -- Determination of moisture
GB/T 13025.3-1991	English	199	Add to Cart	2 days [Need to translate]	General test method in salt industry--Determination of moisture

GB/T 13025.3-2012: General test method in salt industry -- Determination of moisture

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS71.060.50 X35 National Standards of People's Republic of China Replacing GB/T 13025.3-1991 General test method in salt industry - Determination of moisture Issued on. 2012-06-29 2012-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This section of the standard method of series universal testing in salt industry, which is currently divided into the following series of standards section 13 and, if necessary, other test Standard test method will complement the development of the follow-up work. --- GB/T 13025.1 General test method in salt industry - Determination of particle size; --- GB/T 13025.2 General test method in salt industry - Determination of whiteness; --- GB/T 13025.3 General test method in salt industry - Determination of moisture content; --- GB/T 13025.4 General test method in salt industry - Determination of insoluble matter; --- GB/T 13025.5 General test method in salt industry Determination of chloride ion; --- GB/T 13025.6 General test method in salt industry - Determination of calcium and magnesium; --- GB/T 13025.7 General test method in salt industry - Determination of iodine; --- GB/T 13025.8 General test method in salt industry - Determination of sulfate; --- GB/T 13025.9 General test method in salt industry - Determination of lead; --- GB/T 13025.10 General test method in salt industry - Determination of ferrous cyanide; --- GB/T 13025.11 General test method in salt industry - Determination of Fluoride; --- GB/T 13025.12 General test method in salt industry - Determination of barium; --- GB/T 13025.13 General test method in salt industry - Determination of arsenic. This is Part 3 GB/T 13025 in. This section based on GB/T 1.1-2009 of rules for the preparation. This Part replaces GB/T 13025.3-1991 "General test method in salt industry - Determination of moisture," This part of the editorial modify. This section presented by the China Light Industry Federation, the National Salt Industry Standardization Technical Committee centralized. This section drafted by. National Maritime Center Salt Lake standardization. The main drafters of this section. Tong Yun Kun, Huo Jun Fei. This section previously issued as follows. --- GB/T 13025.3-1991. General test method in salt industry - Determination of moisture

1 Scope

This section GB/T 13025 product provides for determination of salt and salt chemical products in the water. This section applies to the determination of salt and salt chemical products, product moisture wherein the loss on drying method applies only to a moisture content of not more than 4% Determination of the sample.

2 Loss on drying method

2.1 Principle Sample at a predetermined temperature (a temperature between 80 ℃ ~ 200 ℃) is dried to constant weight, weighing reductions before and after drying. 2.2 Instrument 2.2.1 Ovens. Temperature fluctuation ≤ ± 2 ℃. 2.2.2 low profile weighing bottle. 60mm × 30mm. 2.3 Analysis Steps Weigh 10g crushed to 2mm or less homogeneous samples, weighing accuracy 0.001g, has been placed at a predetermined temperature dried and weighed low Type weighing bottle, oblique open weighing bottle into the oven temperature gradually warmed to a predetermined temperature, continue drying 2h, covered weighing bottle, take Out and transferred to a dryer, cooled to room temperature and weighed after each drying 1h weighing until two successive weighing the difference does not exceed 0.0005g Regarded as a constant weight. 2.4 Calculation Results The moisture content of the sample mass fraction w and its value as a percentage (%) expressed by the formula (1). w = m1-m2m × 100% (1) Where. m1 --- weighing bottle plus sample before drying mass in grams (g); m2 after drying --- weighing bottle plus sample mass, in grams (g); m --- weighed sample mass, in grams (g). 2.5 Precision In the same laboratory by the same operator using the same equipment, the same testing methods, and in a short time on the same object to be measured phase Two independent mutually independent test results obtained absolute difference is not greater than specified in Table 1. Table 1 The absolute difference between the moisture content /% result /% < 1.00 0.10 1.00 to 4.00 0.20 ...