GB/T 603-2023 PDF English
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Chemical reagent - Preparations of reagent solutions for use in test methods
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| GB/T 603-2002 | English | 95 |
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Chemical reagent -- Preparations of reagent solutions for use in test methods
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Chemical reagent--Preparations of reagent solutions for use in test methods
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GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.040.40; 71.040.30
CCS G 60
Replacing GB/T 603-2002
Chemical Reagent - Preparations of Reagent Solutions for
Use in Test Methods
(ISO 6353-1.1982, Reagents for Chemical Analysis - Part 1.General Test Methods,
NEQ)
Issued on. AUGUST 6, 2023
Implemented on. MARCH 1, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 6
4 General Provisions... 6
5 Preparation Methods... 7
Index... 34
1 Scope
This document specifies the preparation methods for reagent solutions for use in test methods
of chemical reagent.
This document is applicable to the preparation of preparations and products required for
chemical reagent analysis. It can also be used in other fields.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. 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 601 Chemical Reagent - Preparations of Standard Volumetric Solutions
GB/T 602 Chemical Reagent - Preparations of Standard Solutions for Impurity
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 9733 Chemical Reagent - General Method for the Determination of Carbonyl Compounds
3 Terms and Definitions
This document does not have terms or definitions that need to be defined.
4 General Provisions
4.1 Unless otherwise specified in this document, the reagents used shall be of analytically pure
(including analytically pure) or above. The standard titration solutions and standard solutions
used shall be prepared in accordance with the stipulations of GB/T 601 and GB/T 602.The test
water shall comply with the specifications of Grade-3 water in GB/T 6682, and the reagents
shall be weighed accurately to 0.01 g or measured accurately to 0.1 mL.
4.2 Unless otherwise specified in this document, all solvents not specified are water.
4.3 The test solution (A + B) involved in this document refers to solute A and solvent B that are
mutually miscible.
4.4 Except for “ethanol (95%)”, all solutions expressed in percentage (%) in this document are
mass fractions.
4.5 The material of containers used to store preparations and products shall not physically or
chemically interact with the preparations and products.
4.7 When the preparations and products manifest turbidity, precipitation, moisture absorption
or changes in color, they shall be prepared again.
5 Preparation Methods
WARNING. some reagents used in the preparation methods are toxic or corrosive. Some
test processes may lead to dangerous situations. The operator is responsible for taking
appropriate safety and health measures.
5.1 Preparations
5.1.1 General preparations
5.1.1.2 Saturated hydrogen sulfide water
In the fume hood, as shown in Figure 1, connect the device. Add hydrochloric acid solution
(20%) to A, and add ferrous sulfide to B. The hydrochloric acid solution (20%) is dripped from
A into B, and the generated hydrogen sulfide gas is passed into carbon dioxide-free water, until
the D solution is saturated (the mass no longer increases).
5.1.1.3 Saturated bromine water
In the fume hood, measure-take 10 mL of bromine, add it to a brown bottle filled with 75 mL
of water, shake it well, and place it for stratification. The supernatant liquid is saturated bromine
water.
5.1.2 Test solution
5.1.2.1 Ammonia solution
5.1.2.1.1 Ammonia solution (2.5%)
Measure-take 103 mL of ammonia water and dilute to 1,000 mL.
5.1.2.1.2 Ammonia solution (10%)
Measure-take 400 mL of ammonia water and dilute to 1,000 mL.
5.1.2.2 Phenyl anthranilic acid-ethanol solution (1 g/L)
Weigh-take 0.1 g of phenyl anthranilic acid, dissolve it in ethanol (95%), and use ethanol (95%)
to dilute to 100 mL.
5.1.2.3 Phenylfluorone solution (0.1 g/L)
Weigh-take 0.01 g (accurate to 0.0001 g) of phenylfluorone (benzofluorenone), add an
appropriate amount of ethanol (95%), warm to dissolve it; add 1 mL of hydrochloric acid
solution (20%), and use ethanol (95%) to dilute to 100 mL.
5.1.2.4 Benzoylphenylhydroxylamine solution (20 g/L)
Weigh-take 2 g of benzoyl phenyl hydroxylamine (tantalum reagent), dissolve it in ethanol
(95%), and use ethanol (95%) to dilute to 100 mL. The usage period is 6 months.
5.1.2.5 Benzopenttrione color developer
5.1.2.6 Ammonium pyrrolidine dithiocarbamate (APDC) solution (10 g/L)
Weigh-take 1 g of ammonium pyrrolidine dithiocarbamate (APDC), dissolve it in water, dilute
to 100 mL, if necessary, filter it.
5.1.2.40 Potassium sulfate ethanol solution (0.2 g/L)
Weigh-take 0.2 g of potassium sulfate, dissolve it in 700 mL of water and use ethanol (95%) to
dilute to 1,000 mL.
5.1.2.41 Manganese sulfate solution
Weigh-take 67 g of manganese sulfate monohydrate (manganese sulfate), dissolve it in 500 mL
of water, add 138 mL of phosphoric acid and 130 mL of sulfuric acid, and dilute to 1,000 mL.
5.1.2.42 Sodium sulfate solution (400 g/L)
Weigh-take 40 g of anhydrous sodium sulfate, dissolve it in water and dilute to 100 mL.
5.1.2.43 Sulfuric acid solution
5.1.3 Buffer solutions
5.1.3.1 Ammonia-ammonium chloride buffer solution
5.1.3.1.1 Ammonia-ammonium chloride buffer solution A (pH 10)
Weigh-take 54 g of ammonium chloride, dissolve it in water, add 350 mL of ammonia water,
and dilute to 1,000 mL.
5.1.3.3 Acetic acid-ammonium acetate buffer solution
5.1.3.3.1 Acetic acid-ammonium acetate buffer solution (pH 4 ~ 5)
Weigh-take 38.5 g of ammonium acetate, dissolve it in water, add 28.6 mL of acetic acid (glacial
acetic acid), and dilute to 1,000 mL.
5.1.3.3.2 Acetic acid-ammonium acetate buffer solution (pH 6.5)
Weigh-take 59.8 g of ammonium acetate, dissolve it in water, add 1.4 mL of acetic acid (glacial
acetic acid), and dilute to 200 mL.
5.1.3.4 Acetic acid-sodium acetate buffer solution
5.1.4 Indicators and indicator solutions
5.1.4.1 Thymol blue indicator solution (1 g/L)
Weigh-take 0.1 g of thymol blue, dissolve in ethanol (95%), and use ethanol (95%) to dilute to
100 mL.
5.1.4.2 Thyme phenolphthalein indicator solution (1 g/L)
Weigh-take 0.1 g of thymolphthalein, dissolve it in ethanol (95%), and use ethanol (95%) to
dilute to 100 mL.
5.1.4.3 Saturated 2,4-dinitrophenol indicator solution
Saturated aqueous solution of 2,4-dinitrophenol.
5.1.4.4 N-benzene-anthranilic acid indicator solution (2 g/L)
Weigh-take 0.2 g of N-benzene-anthranilic acid, dissolve it in a small amount of water, add 0.2
g of anhydrous sodium carbonate, warm and dissolve it, and dilute to 100 mL. Prepare it just
before use.
5.1.4.5 Phenol red indicator solution (0.2 g/L)
Weigh-take 0.05 g (accurate to 0.0001 g) of phenol red, add 2.85 mL of sodium hydroxide (2
g/L) and 5 mL of ethanol (95%), warm to dissolve it. Then, add 50 mL of ethanol (95%) and
use water to dilute to 250 mL.
5.1.4.6 1-(2-pyridylazo)-2-naphthol (PAN) indicator solution (1 g/L)
Weigh-take 0.1 g of 1-(2-pyridylazo)-2-naphthol (PAN), dissolve it in ethanol (95%) and use
ethanol (95%) to dilute to 100 mL.
5.1.4.10 Sodium diphenylamine sulfonate indicator solution (5 g/L)
Weigh-take 0.5 g of sodium diphenylamine sulfonate, dissolve it in water and dilute to 100 mL.
5.1.4.11 Phenylazoformic acid 2-phenylhydrazide indicator solution
5.1.4.11.1 Phenylazoformic acid 2-phenylhydrazide indicator solution (0.25 g/L)
Weigh-take 0.025 g (accurate to 0.0001 g) of phenylazoformic acid 2-phenylhydrazide, dissolve
it in ethanol (95%) and use ethanol (95%) to dilute to 100 mL.
5.1.4.11.2 Phenylazoformic acid 2-phenylhydrazide indicator solution (5 g/L)
Weigh-take 0.5 g of phenylazoformic acid 2-phenylhydrazide, dissolve it in ethanol (95%) and
use ethanol (95%) to dilute to 100 mL.
5.1.4.12 Xylenol orange indicator solution (2 g/L)
Weigh-take 0.2 g of xylenol orange, dissolve it in water and dilute to 100 mL. The usage period
is 10 days.
5.1.4.13 Dimethyl yellow-methylene blue mixed indicator solution
Weigh-take 1 g of dimethyl yellow and 0.1 g of methylene blue and dissolve it in 125 mL of
methanol.
5.1.4.14 1,10-phenanthroline-ferrous iron indicator solution
Weigh-take 0.7 g of ferrous sulfate heptahydrate, dissolve it in 70 mL of water, add 2 drops of
sulfuric acid, and add 1.5 g of 1,10-phenanthroline (C12H8N2 H2O) [or 1.76 g of 1,10-
phenanthroline hydrochloride (C12H8N2 HCl H2O)]. After dissolving, dilute it to 100 mL.
Prepare it right before use.
5.1.4.15 Phenolphthalein indicator solution (10 g/L)
Weigh-take 1 g of phenolphthalein, dissolve it in ethanol (95%) and use ethanol (95%) to dilute
to 100 mL.
5.1.4.19 Chrome blue black R indicator
Weigh-take 10 g of anhydrous sodium sulfate that has been dried at 105 C 2 C for 2 hours,
add 0.1 g of chrome blue black R, evenly mix and finely grind it. Store it in a desiccator.
5.1.4.20 Methyl thymol blue indicator
Weigh-take 10 g of potassium nitrate that has been dried at 105 C 2 C for 2 hours, add 0.1
g of methyl thymol blue, evenly mix and finely grind it. Store it in a desiccator.
5.1.4.21 Methyl orange indicator solution (1 g/L)
Weigh-take 0.1 g of methyl orange, dissolve it in water at 70 C, cool and dilute to 100 mL.
5.1.4.22 Methyl red-methylene blue mixed indicator solution
Solution I. weigh-take 0.1 g of methylene blue, dissolve it in ethanol (95%) and use ethanol
(95%) to dilute to 100 mL.
Solution II. weigh-take 0.1 g of methyl red, dissolve it in ethanol (95%) and use ethanol (95%)
to dilute to 100 mL. Take 50 mL of Solution I and 100 mL of Solution II, and evenly mix it.
5.1.4.23 Methyl red indicator solution (1 g/L)
Weigh-take 0.1 g of methyl red, dissolve it in ethanol (95%) and use ethanol (95%) to dilute to
100 mL.
5.1.4.24 Methyl violet indicator solution (0.5 g/L)
Weigh-take 0.05 g (accurate to 0.0001 g) of methyl violet, dissolve it in water, and dilute to 100
mL.
5.1.4.25 Crystal violet indicator solution (5 g/L)
Weigh-take 0.5 g of crystal violet, dissolve it in acetic acid (glacial acetic acid), and use acetic
acid (glacial acetic acid) to dilute to 100 mL.
5.1.4.28 o-toluidine indicator solution (1 g/L)
Weigh-take 0.1 g of o-toluidine, add 10 mL of hydrochloric acid and a small amount of water
to dissolve it, and dilute to 100 mL.
5.1.4.29 Iron (III) ammonium sulfate indicator solution (80 g/L)
Weigh-take 8 g of ammonium iron (III) sulfate dodecahydrate, dissolve it in 50 mL of water
containing a few drops of sulfuric acid, and dilute to 100 mL.
5.1.4.30 α-naphthol phenylmethanol-acetic acid indicator solution (2 g/L)
Weigh-take 0.2 g of α-naphthol phenylmethanol, dissolve it in acetic acid (glacial acetic acid)
and use acetic acid (glacial acetic acid) to dilute it to 100 mL.
5.1.4.31 Alizarin red S indicator solution (1 g/L)
Weigh-take 0.1 g of alizarin red S, dissolve it in water and dilute to 100 mL.
5.1.4.32 Eosin sodium salt indicator solution (5 g/L)
Weigh-take 0.5 g of eosin sodium salt, dissolve it in water, and dilute to 100 mL.
5.1.4.33 Acid chromium blue K-naphthol green B mixed indicator solution (KB indicator
solution)
Weigh-take 0.3 g of acid chromium blue K and 0.1 g of naphthol green B, dissolve it in water,
and dilute to 100 mL.
5.1.4.34 Bromothymol blue indicator solution (1 g/L)
Weigh-take 0.1 g of bromothymol blue, dissolve it in 50 mL of ethanol (95%), and dilute to 100
mL.
5.1.4.35 Bromophenol blue indicator solution (0.4 g/L)
Weigh-take 0.04 g (accurate to 0.0001 g) of bromophenol blue, dissolve it in ethanol (95%),
and use ethanol (95%) to dilute to 100 mL.
5.1.4.36 Bromocresol green-methyl red indicator solution
Solution I. weigh-take 0.1 g of bromocresol green, dissolve it in ethanol (95%) and use ethanol
(95%) to dilute to 100 mL.
Solution II. weigh-take 0.2 g of methyl red, dissolve it in ethanol (95%) and use ethanol (95%)
to dilute to 100 mL.
5.2 Products
5.2.1 Starch-potassium iodide test paper
Add 0.2 g of potassium iodide to 100 mL of newly prepared starch indicator solution (10 g/L),
soak the ashless filter paper in the solution, take it out, and dry it in the dark. Place it in a brown
bottle.
5.2.2 Mercury bromide test paper
Weigh-take 1.25 g of mercury bromide and dissolve it in 25 mL of ethanol (95%). Soak the
ashless filer paper in the solution for 1 hour, take it out, and dry it in a dark place. Place it in a
brown bottle.
5.2.3 Lead acetate cotton
Take absorbent cotton and soak it with lead acetate solution (50 g/L). Remove the excess
solution and dry it in a dark place. Place it in a brown bottle.
5.2.4 Lead acetate test paper
Take an appropriate amount of ashless filter paper, soak it with lead acetate solution (50 g/L),
take it out and dry in a dark place. Place it in a brown bottle.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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