Powered by Google www.ChineseStandard.net Database: 189759 (9 Jun 2024)

GB/T 2286-2008 PDF in English


GB/T 2286-2008 (GB/T2286-2008, GBT 2286-2008, GBT2286-2008)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB/T 2286-2008English90 Add to Cart 0-9 seconds. Auto-delivery. Coke -- Determination of total sulfur Obsolete
GB/T 2286-2017English225 Add to Cart 0-9 seconds. Auto-delivery. Determination of total sulfur composition of coke Valid


Standards related to: GB/T 2286-2008

GB/T 2286-2008: PDF in English (GBT 2286-2008)

GB/T 2286-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.080
G18
Replacing GB/T 2286-1991
Coke - Determination of total sulfur
ISSUED ON. AUGUST 19, 2008
IMPLEMENTED ON. APRIL 01, 2009
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 ... 4 
2 Normative references ... 4 
3 Method I (Eschka method) ... 4 
4 Method II (high-temperature combustion method) ... 8 
Annex A ... 13 
Foreword
Consistency BETWEEN this Standard AND ISO 344.1992(E) “Consistency of this
Standard and ISO 344.1992(E) and ISO 351.1996(E) “Solid Mineral Fuels - Determination
of Total Sulphur - Eschka Method" and ISO 351.1996(E) “Solid Mineral Fuels -
Determination of Total Sulphur - High-Temperature Combustion Method” is non-equivalent.
This Standard replaces GB/T 2286-1991 “Coke - Determination of total Sulphur”.
Compared with GB/T 2286-1991, main changes of this Standard are as follows.
— Revise the writing format, terms and symbols;
— Change English name of the standard from “Coke - Determination of Total Sulphur”
to “Coke - Determination of Total Sulfur”;
— Add the Clause “Foreword”;
— Do not divide the standard into chapters;
— Add the “test report” content;
— Do not list the “test preparation” as a separate chapter; move the “test preparation”
content to “test procedures”;
— Add the blank test content according to the provisions of ISO 351.1996(E);
— Annex A Standard solution preparation and calibration are revised and improved
according to GB/T 601-2002.
Annex A to this Standard is normative.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Steel Standardization Technical
Committee.
Main drafting organizations of this Standard. Sinosteel Anshan Research Institute of
Thermo-energy Co., Ltd. AND China Metallurgical Information And Standardization
Institute.
Main drafters of this Standard. Yang Jinxia, Wang Wei, Yu Yinping, Wang Xiong, Guo
Faqing and Sun Wei.
This Standard was released for the first time in 1980 and revised for the first time in 1991.
Coke - Determination of Total Sulfur
1 Scope
This Standard specifies the determination principle of total sulfur, reagents and materials,
instruments and equipment, sampling, test procedures, calculation of results and degree
of precision.
This Standard applies to determination of total sulfur. Method I is Eschka method; method
II is high-temperature combustion method. Eschka method shall be adopted in arbitration
analysis.
2 Normative references
The articles contained in the following documents have become part of this document
when they are quoted herein. For the dated documents so quoted, all subsequent
modifications (including all corrections) or revisions made thereafter do not apply to this
standard. However, the parties who reach an agreement according to this standard are
encouraged to study whether the latest versions of these documents may be used. For
the undated documents so quoted, the latest versions (including all modification sheets)
apply to this document.
GB/T 601 Chemical reagent - Preparations of standard volumetric solutions
GB/T 1997 Coke - Sampling and preparation of samples
3 Method I (Eschka method)
3.1 Principle
Mix sample with Aldrin sufficiently; burn at a certain temperature; make sulfur in coke turn
into sulfate; then make sulfate ion generate barium sulfate precipitation; calculate total
sulfur content in sample according to the mass of barium sulfate.
3.2 Reagents and materials
Warning — Be careful when handling reagents of which many are toxic and
corrosive.
Unless otherwise specified, only use the analytically-pure reagents AND distilled water or
deionized water or water with equivalent purity.
3.2.1 Barium chloride.
3.2.2 MgO. Chemically pure.
3.2.3 Anhydrous sodium carbonate. Chemically pure.
3.2.4 Silver nitrate.
3.2.5 Aldrin. Weigh 2 mass-portions of magnesium oxide and 1 mass-portion of
anhydrous sodium carbonate; grind to particles of which the size is less than 0.2mm; mix
well and store in airtight container.
3.2.6 Hydrogen peroxide. Concentration of 30%.
3.2.7 Hydrochloric acid solution. Density of 1.19g/cm3.
3.2.8 Nitrate. Density of 1.42 g/cm3.
3.2.9 Barium chloride solution (100 g/L). Weigh 100 g of barium chloride; dissolve in water
and dilute to 1 000 mL with water.
3.2.10 Hydrochloric acid solution. (1 + 1).
3.2.11 Silver nitrate solution (10 g/L). Weight 1 g of silver nitrate; dissolve in water and
dilute to 100 mL with water; add a few drops of nitric acid; store in a dark bottle.
3.2.12 Methyl red indicator solution (1 g/L). Weight 0.1 g of methyl red; dissolve in 50 mL
of ethanol; dilute to 100 mL with water.
3.2.13 Qualitative filter paper. Intermediate speed, Φ90 mm~Φ110 mm.
3.2.14 Quantitative filter paper. Intermediate speed, Φ90 mm~Φ110 mm.
3.3 Instruments and equipment
3.3.1 Analytical balance. Sensitivity is 0.000 1 g.
3.3.2 Counter balance. Sensitivity is 0.01 g.
3.3.3 Muffle furnace. With temperature measurement and temperature control devices
that can maintain at temperature 800°C to 850 °C and accompanied by thermocouple and
pyrometer. The position of small hole in rear wall of the furnace shall enable temperature
measuring point of thermocouple to be in the middle of constant-temperature area and
20mm to 30 mm away from furnace bottom; there is a chimney for gas exhaust in the rear.
3.3.4 Dryer. With allochroic silicagel or granular anhydrous calcium chloride inside.
3.3.5 Beaker. 400 mL.
Note. Dilute with sulfuric acid solution [c(1/2H2SO4) = 0.1 mol/L] prepared based on the Annex before
using sulfuric acid solution.
4.2.8 Preparation of methyl red-methylene blue mixed indicator.
4.2.8.1 Mix methylene blue ethanol solution (1 g/L) with methyl red ethanol solution (1 g/L)
based on a 1+2 volume ratio.
4.2.8.2 Weigh 0.125 g of methyl re; dissolve in 50 mL of ethanol; dilute to 100 mL with
water; weigh 0.083 g of methylene blue; dissolve in 50 mL of ethanol; dilute to 100 mL with
water; respectively store in brown bottles. Mix based on a 1 + 1 volume ratio before use;
store in brown dropping bottle.
Note. Above two types of indicator solutions are both optional; validity period of indicator solution after
mixing is 7 days.
4.3 Instruments and equipment
4.3.1 High-temperature tube furnace. Heat through silicon carbide rod or silicon carbon
tube, with temperature regulating device, which can maintain furnace temperature at 1
250°C±10°C.
4.3.2 Combustion tube. Made of high-temperature porcelain, corundum or quartz. Total
tube length is about 750 mm; one end has an outer diameter of 22 mm, an inner diameter
of 19mm and a length of 690 mm; the other end has an outer diameter of 10 mm, an inner
diameter of 7 mm and a length of 60 mm.
4.3.3 Combustion boat. Made of high-temperature porcelain or corundum, length of 77
mm, upper length of 12 mm, lower length of 9 mm and height of 8 mm.
4.3.4 Absorption bottle. Erlenmeyer flask, with a volume of 250mL.
4.3.5 Nickel-chromium wire hook. Diameter of about 2 mm, length of 650 mm, one end
bent into a small hook.
4.3.6 Silicone rubber tube. Outer diameter of 11 mm, inner diameter of 8 mm, length of
about 80 mm.
4.4 Sample preparation
Conduct according to the provisions of GB/T 1997.
4.5 Test procedures
4.5.1 Test preparation
4.5.1.1 Connect the instruments for standby application based on the sequence as shown
in Figure 1.
Where,
Mad — Moisture content of analytical sample, mass fraction (%).
4.7 Degree of precision
Repeatability. Not greater than 0.05%.
Reproducibility. Not greater than 0.1%.
4.8 Test report
Test report shall contain following information.
a) Test sample.
b) Basis standard.
c) Application method;
d) Calculation of results;
e) Deviation from standard;
f) Anomalies observed in test;
g) Test date.
Annex A
(Normative)
Standard Solution Preparation and Calibration
A.1 Sodium hydroxide standard solution (4.2.6) [c(NaOH)=0.1 mol/L]
A.1.1 Preparation
Weigh 110 g of sodium hydroxide; dissolve in 100 mL of water and shake well; inject into
polyethylene container; keep airtight until the solution becomes clear. Use plastic pipe to
siphon 5.4 mL of supernatant; inject into 1 000 mL of carbon dioxide-free water and shake
well.
A.1.2 Calibration
Weigh 0.75 g of working standard reagent potassium hydrogen phthalate that has been
dried in electric stove at 105°C~110°C to a constant weight; dissolve in 50 mL of carbon
dioxide-free water; add 2 drops of phenolphthalein ((10 g/L) indicator solution; use
prepared sodium hydroxide solution for titration of solution to pink; and keep for 30 s;
make blank test simultaneously.
Concentration value of sodium hydroxide standard titration solution [c(NaOH)] is in moles
per liter ((mol/L), calculated according to Formula (A.1).
Where,
m — Exact value of potassium hydrogen phthalate mass, in grams (g);
V1 — Value of sodium hydroxide solution volume, in millimeters (mL);
V2 — Value of blan...
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.