GB/T 3286.9-2014 PDF English
US$790.00 · In stock · Download in 9 secondsGB/T 3286.9-2014: Method for chemical analysis of limestone and dolomite - Part 9: The determination of carbon dioxide content - The caustic asbestos absorption gravimetric method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 3286.9: Evolution and historical versions
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Method for chemical analysis of limestone and dolomite - Part 9: The determination of carbon dioxide content - The caustic asbestos absorption gravimetric method
| Valid |
| GB/T 3286.9-1998 | English | RFQ |
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9 days
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Methods for chemical analysis of limestone and dolomite--The determination of carbon dioxide content
| Obsolete |
| GB/T 3286.9-1982 | English | RFQ |
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3 days
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Chemical analysis of limestone and dolomite--The soda asbestos absorption-gravimetric method for determination of carbon dioxide
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 3286.9-2014
GB/T 3286.9-2014: Method for chemical analysis of limestone and dolomite - Part 9: The determination of carbon dioxide content - The caustic asbestos absorption gravimetric method
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT3286.9-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 73.080
D 52
Replacing GB/T 3286.9-1998
Method for Chemical Analysis of Limestone and Dolomite -
Part 9.The Determination of Carbon Dioxide Content - The
Caustic Asbestos Absorption Gravimetric Method
Issued on. JUNE 9, 2014
Implemented on. JANUARY 1, 2015
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... 6
5 Instruments and Devices... 6
6 Specimen Preparation... 9
7 Analysis Steps... 10
7.1 Number of Determinations... 10
7.2 Amount of Test Portion... 10
7.3 Inspection of Instruments and Devices... 10
7.4 Calibration of Instruments and Devices... 10
7.5 Determination... 10
8 Calculation and Expression of Analysis Results... 12
8.1 Calculation of Analysis Results... 12
8.2 Determination and Expression of Analysis Results... 12
9 Allowable Differences... 12
10 Test Report... 13
Appendix A (normative) Flow Chart of Specimen Analysis Results Acceptance
Procedures... 14
Appendix B (informative) Determination of Carbon Dioxide Content in Metallurgical
Lime Using Combustion Gas Volumetric Method... 15
Appendix C (informative) Temperature and Pressure Correction Coefficient Table... 22
1 Scope
This Part of GB/T 3286 specifies the determination of carbon dioxide content through the
caustic asbestos absorption gravimetric method.
This Part is applicable to the determination of carbon dioxide content in limestone and dolomite,
and also to the determination of carbon dioxide content in metallurgical lime. The determination
range (mass fraction) in limestone and dolomite. carbon dioxide content 30% ~ 50%; the
determination range (mass fraction) in metallurgical lime. carbon dioxide content greater than
0.50%.
2 Normative References
The following documents are indispensable to the application of this document. In terms of
references with a specified date, only versions with a specified date are applicable to this
document. In terms of references without a specified date, the latest version (including all the
modifications) is applicable to this document.
GB/T 2007.2 General Rules for the Sampling and Sample Preparation of Minerals in Bulk -
Manual Method for Sample Preparation
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgment of
Limiting Values
3 Principle
The test portion is decomposed with phosphoric acid, and dry air with carbon dioxide removed
is used as the carrier gas. The generated carbon dioxide is absorbed by caustic asbestos. In
accordance with the increased mass, calculate the carbon dioxide content.
The moisture generated during the decomposition of the test portion is absorbed by sulfuric
acid and magnesium perchlorate, and the hydrogen sulfide generated from the sulfide is
absorbed and removed by chromium trioxide sulfuric acid solution.
4 Reagents
4.1 Unless it is otherwise stated, only approved analytically pure reagents and above Grade-3
distilled water complying with the stipulations of GB/T 6682 or equivalent water shall be used
in the analysis.
4.2 Soda lime.
4.3 Caustic asbestos, with a particle size of 0.5 mm ~ 1 mm.
4.4 Anhydrous magnesium perchlorate, with a particle size of 0.5 mm ~ 1 mm; dry in a drying
oven at 180 C for 2 hours, quickly transfer to a desiccator, cool and set aside.
NOTE. used magnesium perchlorate can be re-used after drying.
4.5 Anhydrous calcium chloride.
4.6 High-purity calcium carbonate, not lower than 99.99%.
4.7 Dehydrated sulfuric acid. place sulfuric acid (ρ = 1.84 g/mL) in a beaker, heat until it emits
smoke, and maintain for a while, let it slightly cool, then, carefully place in a desiccator, cool
and set aside.
4.8 Phosphoric acid, 1 + 1.
4.9 Chromium trioxide sulfuric acid solution, 10 g/L.
Take 1 g of chromium trioxide in a beaker, add 1 mL of water, add 100 mL of sulfuric acid (ρ
= 1.84 g/mL) to dissolve it, and evenly mix it.
5 Instruments and Devices
The device for measuring carbon dioxide is shown in Figure 1.
Description of indexes.
5.1 Rotor flowmeter (1 in Figure 1), 20 mL/min ~ 200 mL/min, used to observe the flow of air
as the carrier gas.
5.2 Drying tower (2 in Figure 1). with a capacity of approximately 500 mL, containing soda
lime (4.2).
5.3 Drying tower (3 in Figure 1). with a capacity of approximately 500 mL, containing
anhydrous calcium chloride (4.5).
5.4 Special-made acid adding tube (4 in Figure 1). with a capacity of 30 mL.
5.5 Special-made connecting tube (5 in Figure 1). use double-hole rubber plugs to connect to
the dry tower (5.3) and the special-made acid adding tube (5.4).
5.13 Drying tower (13 in Figure 1). the lower part contains anhydrous calcium chloride (4.5),
the upper part contains soda lime (4.2), separated by absorbent cotton in the middle.
5.14 Gas washing bottle (14 in Figure 1), containing water.
5.15 Water flow suction tube (15 in Figure 1), connected to the faucet.
5.16 All parts of the device are connected with rubber hoses of appropriate length as shown in
Figure 1, and each device is fixed with corresponding clamps.
6 Specimen Preparation
6.1 In accordance with GB/T 2007.2, prepare the specimens.
6.2 The specimens shall be processed until the particle size is less than 0.125 mm.
6.3 Before analysis, the limestone and dolomite specimens shall be dried at 105 C ~ 110 C
for 2 hours and placed in a desiccator to cool to room temperature.
7 Analysis Steps
7.1 Number of Determinations
For the same specimen (6.3 or 6.4), conduct at least two independent determinations.
7.4 Calibration of Instruments and Devices
The calibration of instruments and devices is performed in accordance with 7.5.
7.5 Determination
7.5.1 Adjust Piston E to control the air flow rate at 170 mL/min ~ 180 mL/min and maintain it
for about 15 min. Close F. After the buttles in the gas washing bottle (5.10) stop, successively
close the pistons of the carbon dioxide absorbing U-shaped tube (5.12) and the U-shaped tube
(5.11) and remove the carbon dioxide absorbing U-shaped tube (5.12). Use clean gauze to
gently wipe it, place it in the balance box for 15 minutes, and weigh it.
7.5.2 Then, connect the carbon dioxide absorbing U-shaped tube (5.12) to the determination
system, and operate in accordance with 7.5.1, until the difference between the two weighings
is not greater than 0.5 mg. Take the last weighed mass as the mass of the U-shaped tube (5.12)
before absorbing carbon dioxide.
7.5.8 After the determination is completed, connect the carbon dioxide absorbing U-shaped tube
(5.12) to the determination system, successively close B, D, G and H, and finally, close the air
extraction water gate to prevent water from flowing back.
8 Calculation and Expression of Analysis Results
8.1 Calculation of Analysis Results
9 Allowable Differences
The difference between two independent analysis results within the laboratory and the
difference between two laboratory analysis results shall not be greater than the corresponding
allowable differences listed in Table 1
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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