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GB/T 13025.12-2012 English PDF (GBT13025.12-2012)

GB/T 13025.12-2012 English PDF (GBT13025.12-2012)

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GB/T 13025.12-2012: General test method in salt industry -- Determination of barium
This Part of GB/T 13025 specifies the method for determination of barium in salt products. This Standard applies to the determination of barium in salt products.
GB/T 13025.12-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.020.50
X 35
Replacing GB/T 13025.12-1994
General Test Method in Salt Industry –
Determination of Barium
ISSUED ON. JUNE 29, 2012
IMPLEMENTED ON. DECEMBER 1, 2012
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Principle ... 5
4 Reagents ... 5
5 Apparatus ... 6
6 Analytical Procedure ... 6
7 Calculation ... 7
8 Accuracy ... 7
Foreword
This Standard belongs to a complete group of general test method standards in salt industry; the complete group comprises the following 13 parts at present; and other test method standards will be developed in the future, if necessary.
-- GB/T 13025.1 General Test Method in Salt Industry – Determination of Grain 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 -- 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 Ferrocyanide
-- 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 Standard is the part 12 of GB/T 13025.
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 13025.12-1994, General Test Method in Salt Industry - Determination of Barium Ion. Compared with GB/T 13025.12-1994, the main technical differences of this Standard, except editorial modifications, are as follows. -- it optimizes the conditions and parameters of graphite furnace;
-- it determines the accuracy of testing results; and
General Test Method in Salt Industry –
Determination of Barium
1 Scope
This Part of GB/T 13025 specifies the method for determination of barium in salt products.
This Standard applies to the determination of barium in salt products.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced document (including any amendments) applies to this Standard.
GB/T 6682-2008 Water for Analytical Laboratory Use – Specification and Test Methods
3 Principle
Sample is injected into a graphite furnace atomizer after it is processed properly; the barium contained dissociated into an atomic vapour in the graphite pipe through high temperature evaporation; the ground state atoms absorbs the resonance line emitted from barium hollow cathode lamp, and its absorption intensity is proportional to the concentration of barium within a certain range.
4 Reagents
4.1 Specifications of reagents
Unless otherwise specified, only reagents identified as Analytical Grade and Grade 2 water as specified in GB/T 6682-2008 are used in the analysis.
4.2 Ammonium nitrate (300 g/L)
Measure 30 g of ammonium nitrate; use water to dilute to 100 mL.
4.3 Vanadium solution (1.0 g/mL)
Weigh 0.178 5 g of vanadium pentoxide; dissolve in 100 mL of hydrochloride acid (5 +
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