JC/T 1088-2008 English PDF (JCT1088-2008)

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JC/T 1088-2008: Methods for chemical analysis of granulated electric furnace phosphorous slag
JC/T 1088-2008
BUILDING MATERIAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS
Registration number: 24205-2008
Methods for chemical analysis of granulated
electric furnace phosphorus slag
ISSUED ON: JUNE 16, 2008
IMPLEMENTED ON: DECEMBER 01, 2008
Issued by: National Development and Reform Commission of PRC
Table of Contents
Foreword ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 5 
4 Basic requirements of test ... 6 
5 Reagents and materials ... 7 
6 Instruments and equipment ... 12 
7 Preparation of specimen ... 13 
8 Determination of loss on ignition - Ignition reduction method ... 13 
9 Determination of silica - Potassium fluorosilicate capacity method ... 14 
10 Determination of ferric oxide - EDTA direct titration ... 14 
11 Determination of aluminum oxide - EDTA direct titration ... 14 
12 Determination of calcium oxide - Calcium carbonate back titration ... 14 
13 Determination of magnesium oxide - Atomic absorption spectroscopy
(reference method) ... 16 
14 Determination of sulfur trioxide - Barium sulfate gravimetric method ... 16 
15 Determination of potassium oxide and sodium oxide - Flame photometric
method ... 16 
16 Determination of phosphorus pentoxide - Ammonium phosphomolybdate
colorimetric method ... 16 
17 Determination of magnesium oxide - EDTA titration reduction (substitution)
... 17 
18 Determination of fluoride ions - Ion selective electrode method ... 18 
19 Determination of chloride ions - Phosphoric acid distillation - Mercury salt
titration ... 18 
20 Repeatability limits and reproducibility limits ... 19 
Foreword
The consistency between this standard and EN 196-2:2005 “Method of testing
cement - Part 2: Chemical analysis of cement” and ASTM C114:2005 “Standard
test methods for chemical analysis of hydraulic cement” is not equivalent.
This standard was proposed by the China Building Materials Federation.
This standard shall be under the jurisdiction of the National Cement
Standardization Technical Committee (SAC/TC 184).
Drafting organizations of this standard: China Building Materials Science
Research Institute, China Building Materials Inspection and Certification Center.
Main drafters of this standard: Yan Weizhi, Wang Ruihai, Wang Guanjie, Wen
Yugang, Huang Xiaolou.
This standard is the first release.
Methods for chemical analysis of granulated
electric furnace phosphorus slag
1 Scope
This standard specifies the benchmark method and substitution method for the
method of chemical analysis of granulated electric furnace phosphorus slag. In
case of dispute, the benchmark method shall prevail.
This standard applies to the granulated electric furnace phosphorus slag used
in the building materials industry and other materials designated to adopt this
standard.
2 Normative references
The provisions in following documents become the provisions of this standard
through reference in this standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this standard;
however, parties who reach an agreement based on this standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 176-2008 Methods for chemical analysis of cement
GB/T 2007.1 General rules for the sampling and sample preparation of
minerals in bulk - Sampling by manual method
GB/T 6682 Water for analytical laboratory use - Specification and test
methods
3 Terms and definitions
The terms and definitions as established in the GB/T 15000 series as well as
the following terms and definitions apply to this standard.
3.1
Repeatability conditions
The conditions for independent test of the same tested object in the same
laboratory, by the same operator using the equipment, according to the same
test method, in a short period of time.
3.2
Reproducibility conditions
The conditions for independent test of the same tested object in different
laboratories, by different operators using different equipment, according to
the same test method.
3.3
Repeatability limit
A value, under the repeatability conditions (3.1), the probability that the
absolute difference between the two test results is less than or equal to this
value is 95%.
3.4
Reproducibility limit
A value, under reproducibility conditions (3.2), the probability that the
absolute difference between the two test results is less than or equal to this
value is 95%.
4 Basic requirements of test
4.1 Number of tests and requirements
The number of tests per determination is specified as two. Use the average
value of the two tests to express the determination result.
Before the analysis, the specimen shall be baked at 105 °C ~ 110 °C for 2 h,
cooled to room temperature in a desiccator, then weighed.
In the chemical analysis, unless otherwise stated, it must determine the loss on
ignition at the same time. For other determinations, it shall carry out the blank
test at the same time, meanwhile correct the test results.
4.2 Expression of mass, volume, results
Use “grams (g)” to express mass, accurate to 0.0001 g. The burette’s volume
is expressed in “milliliter (mL)”, accurate to 0.05 mL. The unit of titer is
expressed in “milligram per milliliter (mg/mL)”.
The titer of chloride ions in the standard titration solution of mercury nitrate
retains three significant digits after the rounding off. The titer and volume ratio
of other standard titration solutions retain four significant digits after the
rounding off.
Unless otherwise stated, the results of each analysis are based on mass
fraction. The analytical results of the chloride ion are expressed in % to three
decimal places. The analytical results of other items are expressed in % to two
decimal places.
4.3 Blank test
Use the same amount of reagent. Do not add specimen. Use the same
determination procedures to carry out test, to correct the determination results
as obtained.
4.4 Ignition
Place the filter paper and the precipitate in a crucible which has previously been
burned to a constant weight. To avoid producing flame, in an oxidizing
atmosphere, slowly dry and ash it. After ashing it to the absence of black carbon
particle, then place it in a high-temperature furnace (6.4), to burn it at the
specified temperature. In a desiccator (6.3), cool it to room temperature. Weigh
it.
4.5 Constant weight
After the first burning, cooling, weighing, use the method of applying continuous
burning of 15 min, cooling, weighing, to check the constant mass. When the
difference between two consecutive weighing results is less than 0.0005 g, it
reaches constant weight.
5 Reagents and materials
Unless otherwise stated, the reagents used shall be not less than analytical
pure. The water used shall meet the requirements for grade-3 water as
specified in GB/T 6682.
The density of commercially available concentrated liquid reagents as listed in
this standard refers to a density (ρ) at 20 °C, in grams per cubic centimeter
(g/cm3). In chemical analysis, the acid or ammonia used, unless otherwise the
concentration is not indicated, refers to commercially available concentrated
acid or concentrated ammonia. Use the volume ratio to indicate the degree of
dilution of the reagent. For example, hydrochloric acid (1 + 2) me...