HG/T 3696.1-2011 PDF English
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HG/T 3696.1-2011: Inorganic chemicals for industrial use - Preparations of standard and reagent solutions for chemical analysis - Part 1: Preparations of standard volumetric solutions
---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/HGT3696.1-2011
CHEMICAL INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.060.01;71.060.99
G 10
Filing No.. 34581-2012
Replacing HG/T 3696.1-2002
Inorganic chemicals for industrial use - Preparation of
standard and reagent solutions for chemical analysis - Part
1.Preparations of standard volumetric solutions
Issued on. DECEMBER 20, 2011
Implemented on. JULY 01, 2012
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 General provisions... 6
4 Warning... 7
5 Preparation and calibration of standard titration solution... 8
5.1 Sodium hydroxide standard titration solution... 8
5.2 Hydrochloric acid standard titration solution... 9
5.3 Sulfuric acid standard titration solution... 10
5.4 Sodium carbonate standard titration solution... 11
5.5 Potassium dichromate standard titration solution [c(1/6 K2Cr2) ≈ 0.1 mol/L]... 12
5.6 Sodium thiosulfate standard titration solution [c(Na2S2O3) ≈ 0.1 mol/L]... 14
5.7 Bromine standard titration solution [c(1/2Br2) ≈ 0.1 mol/L]... 15
5.8 Potassium bromate standard titration solution [c(1/6KBrO3) ≈ 0.1 mol/L]... 16
5.9 Iodine standard titration solution [c(1/2I2) ≈ 0.1 mol/L]... 17
5.10 Potassium carbonate standard titration solution... 19
5.11 Oxalic acid standard titration solution [c(1/2C2H2O4) ≈ 0.1 mol/L]... 21
5.12 Potassium permanganate standard titration solution [c(1/5KMnO4) ≈ 0.1 mol/L]
... 22
5.13 Ammonium ferrous sulfate standard titration solution {c[(NH4)2Fe(SO4)2] ≈ 0.1
mol/L}... 23
5.14 Cerium sulfate (or cerium ammonium sulfate) standard titration solution {c[Ce(SO4)2]
≈ 0.1 mol/L, c[2(NH4)2(SO4) • Ce(SO4)2] ≈ 0.1 mol/L}... 24
5.15 Disodium ethylenediaminetetraacetate (EDTA) standard titration solution... 26
5.16 Zinc chloride standard titration solution [c(ZnCl2) ≈ 0.1 mol/L]... 28
5.17 Magnesium chloride (or magnesium sulfate) standard titration solution [c(MgCl2) ≈
0.1 mol/L, c(MgSO4) ≈ 0.1 mol/L]... 29
5.18 Lead nitrate standard titration solution {c[Pb(NO3)2] ≈ 0.05 mol/L}... 30
5.19 Copper sulfate standard titration solution [c(CuSO4) ≈ 0.1 mol/L]... 31
5.20 Silver nitrate standard titration solution [c(AgNO3) ≈ 0.1 mol/L]... 32
5.21 Sodium chloride standard titration solution [c(NaCl) ≈ 0.1 mol/L]... 33
5.22 Sodium thiocyanate (or potassium thiocyanate or ammonium thiocyanate) standard
titration solution [c(NaSCN) ≈ 0.1 mol/L, c(KSCN) ≈ 0.1 mol/L, c(NH4SCN) ≈ 0.1
mol/L]... 34
5.23 Sodium nitrite standard titration solution... 36
5.24 Perchloric acid standard titration solution [c(HCIO4) ≈ 0.1 mol/L]... 38
5.25 Mercury nitrate standard titration solution {c[1/2Hg(NO3)2] ≈ 0.1 mol/L}... 39
5.26 Sodium oxalate standard titration solution... 40
Appendix A (Normative) Corrected value of volume of standard titration solution at
different temperatures... 42
Appendix B (Informative) Determination of potentiometric titration end point and
example of data recording... 43
Appendix C (Informative) Treatment method of mercury-containing waste liquid... 45
1 Scope
This Part specifies the preparation and calibration methods of the main standard titration
solutions, which are used by the volumetric method, for chemical analysis of inorganic
chemical products.
This Part is applicable to the preparation of standard titration solutions of accurate
concentration for volumetric determination of the main content and impurity content of
inorganic chemical products. It can also be used for chemical analysis of other chemical
products.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 6682-2008 Water for analytical laboratory use - Specification and test
methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgement
of limiting values
HG/T 3696.3-2011 Inorganic chemicals for industrial use - Preparations of standard
and reagent solutions for chemical analysis - Part 3.Preparations of reagent
solutions
3 General provisions
3.1 The water used in this Part, unless other requirements are specified, shall meet the
specifications of grade-3 water in GB/T 6682-2008.
3.2 The reference reagents, which are used in the calibration in this Part, are the
reference reagents for volumetric analysis; the other reagents used are all reagents of
analytical grade or above.
3.3 Analytical balances, weights, burettes, volumetric flasks, single-marked pipettes,
which are used in work, need to be calibrated regularly.
3.4 The concentration of the standard titration solution, which is prepared in this Part,
except for perchloric acid, refers to the concentration at 20 °C. During calibration and
use, if there is a difference in temperature, it shall be corrected, according to Appendix
A.
4 Warning
Some of the reagents, which are used in the preparation method of this Part, are
toxic or corrosive, so be careful when handling! If splashed on the skin, rinse
immediately with water; in severe cases, seek medical attention immediately.
5 Preparation and calibration of standard titration solution
5.1 Sodium hydroxide standard titration solution
5.1.1 Preparation
5.2 Hydrochloric acid standard titration solution
5.2.1 Preparation
Pipette the specified volume of hydrochloric acid, according to Table 2.Pour it into
1000 mL of water. Shake well.
5.2.2 Calibration
5.2.2.1 Determination method
According to Table 2, weigh the specified amount of benchmark anhydrous sodium
carbonate, which was calcined in a high temperature furnace at 270 °C ~ 300 °C to a
constant mass, accurate to 0.0001 g.
5.2.2.2 Result calculation
The concentration of hydrochloric acid standard titration solution [c(HCl)] is expressed
in moles per liter (mol/L), which is calculated according to formula (2).
5.5.1 Method 1
5.5.1.1 Preparation
Weigh 5 g of potassium dichromate. Dissolve it in 1000 mL of water. Shake well.
5.5.1.2 Calibration
5.7 Bromine standard titration solution [c(1/2Br2) ≈ 0.1 mol/L]
5.7.1 Preparation
Weigh 3 g of potassium bromate and 25 g of potassium bromide. Dissolve it in 1000
mL of water. Shake well.
5.7.2 Calibration
5.14.2 Calibration
5.14.2.1 Method 1
5.14.2.1.1 Determination method
Weigh 0.2 g of benchmark sodium oxalate, which is dried to the constant mass in an
electric heating constant temperature drying oven at 105 °C ~ 110 °C, accurate to
0.0001 g. Dissolve it in 75 mL of water. Add 4 mL of sulfuric acid solution (20%) and
10 mL of hydrochloric acid. Heat it to 65 °C ~ 70 °C. Use the prepared cerium sulfate
standard titration solution (or cerium ammonium sulfate) to titrate it, until the solution
turns pale yellow. Add 3 drops of ferrous-o-phenanthroline indicator solution, to make
the solution become orange-red. Continue to titrate, until the solution is light blue. At
the same time, carry out a blank test.
HG/T 3696.1-2011
CHEMICAL INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.060.01;71.060.99
G 10
Filing No.. 34581-2012
Replacing HG/T 3696.1-2002
Inorganic chemicals for industrial use - Preparation of
standard and reagent solutions for chemical analysis - Part
1.Preparations of standard volumetric solutions
Issued on. DECEMBER 20, 2011
Implemented on. JULY 01, 2012
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 General provisions... 6
4 Warning... 7
5 Preparation and calibration of standard titration solution... 8
5.1 Sodium hydroxide standard titration solution... 8
5.2 Hydrochloric acid standard titration solution... 9
5.3 Sulfuric acid standard titration solution... 10
5.4 Sodium carbonate standard titration solution... 11
5.5 Potassium dichromate standard titration solution [c(1/6 K2Cr2) ≈ 0.1 mol/L]... 12
5.6 Sodium thiosulfate standard titration solution [c(Na2S2O3) ≈ 0.1 mol/L]... 14
5.7 Bromine standard titration solution [c(1/2Br2) ≈ 0.1 mol/L]... 15
5.8 Potassium bromate standard titration solution [c(1/6KBrO3) ≈ 0.1 mol/L]... 16
5.9 Iodine standard titration solution [c(1/2I2) ≈ 0.1 mol/L]... 17
5.10 Potassium carbonate standard titration solution... 19
5.11 Oxalic acid standard titration solution [c(1/2C2H2O4) ≈ 0.1 mol/L]... 21
5.12 Potassium permanganate standard titration solution [c(1/5KMnO4) ≈ 0.1 mol/L]
... 22
5.13 Ammonium ferrous sulfate standard titration solution {c[(NH4)2Fe(SO4)2] ≈ 0.1
mol/L}... 23
5.14 Cerium sulfate (or cerium ammonium sulfate) standard titration solution {c[Ce(SO4)2]
≈ 0.1 mol/L, c[2(NH4)2(SO4) • Ce(SO4)2] ≈ 0.1 mol/L}... 24
5.15 Disodium ethylenediaminetetraacetate (EDTA) standard titration solution... 26
5.16 Zinc chloride standard titration solution [c(ZnCl2) ≈ 0.1 mol/L]... 28
5.17 Magnesium chloride (or magnesium sulfate) standard titration solution [c(MgCl2) ≈
0.1 mol/L, c(MgSO4) ≈ 0.1 mol/L]... 29
5.18 Lead nitrate standard titration solution {c[Pb(NO3)2] ≈ 0.05 mol/L}... 30
5.19 Copper sulfate standard titration solution [c(CuSO4) ≈ 0.1 mol/L]... 31
5.20 Silver nitrate standard titration solution [c(AgNO3) ≈ 0.1 mol/L]... 32
5.21 Sodium chloride standard titration solution [c(NaCl) ≈ 0.1 mol/L]... 33
5.22 Sodium thiocyanate (or potassium thiocyanate or ammonium thiocyanate) standard
titration solution [c(NaSCN) ≈ 0.1 mol/L, c(KSCN) ≈ 0.1 mol/L, c(NH4SCN) ≈ 0.1
mol/L]... 34
5.23 Sodium nitrite standard titration solution... 36
5.24 Perchloric acid standard titration solution [c(HCIO4) ≈ 0.1 mol/L]... 38
5.25 Mercury nitrate standard titration solution {c[1/2Hg(NO3)2] ≈ 0.1 mol/L}... 39
5.26 Sodium oxalate standard titration solution... 40
Appendix A (Normative) Corrected value of volume of standard titration solution at
different temperatures... 42
Appendix B (Informative) Determination of potentiometric titration end point and
example of data recording... 43
Appendix C (Informative) Treatment method of mercury-containing waste liquid... 45
1 Scope
This Part specifies the preparation and calibration methods of the main standard titration
solutions, which are used by the volumetric method, for chemical analysis of inorganic
chemical products.
This Part is applicable to the preparation of standard titration solutions of accurate
concentration for volumetric determination of the main content and impurity content of
inorganic chemical products. It can also be used for chemical analysis of other chemical
products.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 6682-2008 Water for analytical laboratory use - Specification and test
methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgement
of limiting values
HG/T 3696.3-2011 Inorganic chemicals for industrial use - Preparations of standard
and reagent solutions for chemical analysis - Part 3.Preparations of reagent
solutions
3 General provisions
3.1 The water used in this Part, unless other requirements are specified, shall meet the
specifications of grade-3 water in GB/T 6682-2008.
3.2 The reference reagents, which are used in the calibration in this Part, are the
reference reagents for volumetric analysis; the other reagents used are all reagents of
analytical grade or above.
3.3 Analytical balances, weights, burettes, volumetric flasks, single-marked pipettes,
which are used in work, need to be calibrated regularly.
3.4 The concentration of the standard titration solution, which is prepared in this Part,
except for perchloric acid, refers to the concentration at 20 °C. During calibration and
use, if there is a difference in temperature, it shall be corrected, according to Appendix
A.
4 Warning
Some of the reagents, which are used in the preparation method of this Part, are
toxic or corrosive, so be careful when handling! If splashed on the skin, rinse
immediately with water; in severe cases, seek medical attention immediately.
5 Preparation and calibration of standard titration solution
5.1 Sodium hydroxide standard titration solution
5.1.1 Preparation
5.2 Hydrochloric acid standard titration solution
5.2.1 Preparation
Pipette the specified volume of hydrochloric acid, according to Table 2.Pour it into
1000 mL of water. Shake well.
5.2.2 Calibration
5.2.2.1 Determination method
According to Table 2, weigh the specified amount of benchmark anhydrous sodium
carbonate, which was calcined in a high temperature furnace at 270 °C ~ 300 °C to a
constant mass, accurate to 0.0001 g.
5.2.2.2 Result calculation
The concentration of hydrochloric acid standard titration solution [c(HCl)] is expressed
in moles per liter (mol/L), which is calculated according to formula (2).
5.5.1 Method 1
5.5.1.1 Preparation
Weigh 5 g of potassium dichromate. Dissolve it in 1000 mL of water. Shake well.
5.5.1.2 Calibration
5.7 Bromine standard titration solution [c(1/2Br2) ≈ 0.1 mol/L]
5.7.1 Preparation
Weigh 3 g of potassium bromate and 25 g of potassium bromide. Dissolve it in 1000
mL of water. Shake well.
5.7.2 Calibration
5.14.2 Calibration
5.14.2.1 Method 1
5.14.2.1.1 Determination method
Weigh 0.2 g of benchmark sodium oxalate, which is dried to the constant mass in an
electric heating constant temperature drying oven at 105 °C ~ 110 °C, accurate to
0.0001 g. Dissolve it in 75 mL of water. Add 4 mL of sulfuric acid solution (20%) and
10 mL of hydrochloric acid. Heat it to 65 °C ~ 70 °C. Use the prepared cerium sulfate
standard titration solution (or cerium ammonium sulfate) to titrate it, until the solution
turns pale yellow. Add 3 drops of ferrous-o-phenanthroline indicator solution, to make
the solution become orange-red. Continue to titrate, until the solution is light blue. At
the same time, carry out a blank test.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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