Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 1914-2007 Chemical analytical filter paper.
The following technical deviations have been made with respect to the GB/T 1914-2007 (the previous edition):
——The normative references are modified;
——The breaking length of qualitative filter paper is changed into tensile strength;
——Three technical indexes, namely dry bursting resistance, alkali resistance and D65 fluorescence brightness, are added;
——Brightness is changed to D65 brightness, and technical requirements for filtration performance are changed to that it shall be qualified;
——The determination methods of filtration time and wet bursting resistance are improved.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Paper Industry of Standardization Administration of China (SAC/TC 141).
The previous editions of the standards replaced by this standard are as:
——GB/T 1914-1980, GB/T 1914-1993, GB/T 1914-2007.
Chemical analytical filter paper
1 Scope
This standard specifies the terms and definitions, product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of qualitative and quantitative filter paper for chemical analysis.
This standard is applicable to the qualitative and quantitative filter paper for chemical analysis.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 450 Paper and board—Sampling for testing and identification of machine and cross direction, wire side and felt side
GB/T 451.1 Paper and board—Determination of size and deviation
GB/T 451.2 Paper and board—Determination of grammage
GB/T 454 Paper—Determination of bursting strength
GB/T 462 Paper, board and pulp—Determination of moisture content of analytical sample
GB/T 742 Fibrous raw material, pulp, paper and board—Determination of ash
GB/T 744 Pulps—Determination of alkali resistance
GB/T 1541 Paper and board—Determination of dirt count
GB/T 1545.2-2003 Paper, board and pulps—Determination of pH of aqueous extracts
GB/T 2828.1 Sampling procedures for inspection by attributes—Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 6682 Water for analytical laboratory use—Specification and test methods
GB/T 7974 Paper, board and pulps—Measurement of diffuse blue reflectance factor—D65 brightness (Diff/Geometry, Outdoor daylight conditions)
GB/T 10340 Paper and board—Determination of filtering rate
GB/T 10739 Paper, board and pulps—Standard atmosphere for conditioning and testing
GB/T 12914 Paper and board—Determination of tensile properties
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
filtration performance
ability of filter paper to separate suspension into supernatant liquid and solid precipitation
4 Product classification
4.1 Chemical analysis filter paper is divided by their uses into qualitative filter paper and quantitative filter paper. Qualitative filter paper can be divided into three types according to different filtration rate: 101 (fast qualitative filter paper), 102 (intermediate qualitative filter paper) and 103 (slow qualitative filter paper); quantitative filter paper is also divided into three types according to the different filtration rate: 201 (fast quantitative filter paper), 202 (intermediate quantitative filter paper) and 203 (slow quantitative filter paper).
4.2 The qualitative filter paper and quantitative filter paper are classified into superior product, first-grade product and acceptable product based on the product quality.
5 Requirements
5.1 The technical indexes of qualitative filter paper shall be in accordance with those specified in Table 1.
Table 1
Item Requirements
Superior product First-grade product Acceptable product
Type 101 Type 102 Type 103 Type 101 Type 102 Type 103 Type 101 Type 102 Type 103
Quantitative g/m2 80.0 ± 4.0 80.0 ± 4.0 80.0 ± 5.0
Filtration performance — Passed
Filtration time s ≤35 >35~70 >70~140 ≤35 >35~70 >70~140 ≤35 >35~70 >70~140
Tensile strength (longitudinal) ≥ N/m 1200 1500 1500 1200 1500 1500 1200 1500 1500
Dry bursting resistance ≥ kPa 85 90 90 85 90 90 80 85 85
Wet bursting resistance ≥ mm water column 130 150 200 120 140 180 120 140 180
Alkali resistance≥ % 92.0 92.0 92.0 92.0 92.0 92.0 90.0 90.0 90.0
Ash≤ % 0.11 0.13 0.15
pH of aqueous extracts — 6.0~8.0
D65 brightness ≥ % 85.0
D65 fluorescence brightness % 0.5
Dust count ≤ 0.2mm2~0.3mm2 pcs/m2 70 80 90
>0.3mm2~0.7mm2 8 10 12
>0.7mm2 Not allowed Not allowed Not allowed
Delivery moisture % 7.0 ± 3.0
The technical indexes of quantitative filter paper shall be in accordance with those specified in Table 2.
Table 2
Item Requirements
Superior product First-grade product Acceptable product
Type 201 Type 202 Type 203 Type 201 Type 202 Type 203 Type 201 Type 202 Type 203
Quantitative g/m2 80.0 ± 4.0 80.0 ± 4.0 80.0 ± 5.0
Filtration performance — Passed
Filtration time s ≤35 >35~70 >70~140 ≤35 >35~70 >70~140 ≤35 >35~70 >70~140
Dry bursting resistance ≥ kPa 85 90 90 85 90 90 80 85 85
Wet bursting resistance ≥ mm Water column 130 150 200 120 140 180 120 140 180
Alkali resistance≥ % 95.0 95.0 95.0 95.0 95.0 95.0 93.0 93.0 93.0
Ash≤ % 0.009 0.010 0.011
pH of aqueous extracts — 5.0~8.0
D65 brightness ≥ % 85.0
D65 fluorescence brightness % 0.5
Dust count ≤ 0.2mm2~0.3mm2 pcs/m2 70 80 90
>0.3mm2~0.7mm2 8 10 12
>0.7mm2 Not allowed Not allowed Not allowed
Delivery moisture % 7.0 ± 3.0
5.3 Qualitative filter paper is divided into square one and round one. For the former, the size is generally 600 mm × 600 mm and 300 mm × 300 mm, the size deviation shall not exceed ±3 mm and the skewness shall not exceed 3 mm; for the latter, the diameter is generally 55 mm, 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 180 mm, 230 mm and 270 mm, and the diameter deviation shall not exceed ±1 mm. The round quantitative filter paper is common used. Its diameter is 55 mm, 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 180 mm, 230 mm and 270 mm, and diameter deviation shall not exceed ±1 mm. It is also allowed to produce qualitative and quantitative filter paper of other specifications and sizes according to the order contract.
5.4 The side cut of the paper shall be regular and clean and no burrs or cracks, etc. are found on its appearance.
5.5 The paper shall be uniform in fiber texture, and clean on its surface without visible metal impurities, sand grains, coal dust and other hard blocks. It is also not allowable to have folds, streaks, transparent points, pinholes, etc., or obvious hair slip.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation and storage
Annex A (Normative) Method for the determination of filtration performance
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 1914-2007 Chemical analytical filter paper.
The following technical deviations have been made with respect to the GB/T 1914-2007 (the previous edition):
——The normative references are modified;
——The breaking length of qualitative filter paper is changed into tensile strength;
——Three technical indexes, namely dry bursting resistance, alkali resistance and D65 fluorescence brightness, are added;
——Brightness is changed to D65 brightness, and technical requirements for filtration performance are changed to that it shall be qualified;
——The determination methods of filtration time and wet bursting resistance are improved.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Paper Industry of Standardization Administration of China (SAC/TC 141).
The previous editions of the standards replaced by this standard are as:
——GB/T 1914-1980, GB/T 1914-1993, GB/T 1914-2007.
Chemical analytical filter paper
1 Scope
This standard specifies the terms and definitions, product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of qualitative and quantitative filter paper for chemical analysis.
This standard is applicable to the qualitative and quantitative filter paper for chemical analysis.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 450 Paper and board—Sampling for testing and identification of machine and cross direction, wire side and felt side
GB/T 451.1 Paper and board—Determination of size and deviation
GB/T 451.2 Paper and board—Determination of grammage
GB/T 454 Paper—Determination of bursting strength
GB/T 462 Paper, board and pulp—Determination of moisture content of analytical sample
GB/T 742 Fibrous raw material, pulp, paper and board—Determination of ash
GB/T 744 Pulps—Determination of alkali resistance
GB/T 1541 Paper and board—Determination of dirt count
GB/T 1545.2-2003 Paper, board and pulps—Determination of pH of aqueous extracts
GB/T 2828.1 Sampling procedures for inspection by attributes—Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 6682 Water for analytical laboratory use—Specification and test methods
GB/T 7974 Paper, board and pulps—Measurement of diffuse blue reflectance factor—D65 brightness (Diff/Geometry, Outdoor daylight conditions)
GB/T 10340 Paper and board—Determination of filtering rate
GB/T 10739 Paper, board and pulps—Standard atmosphere for conditioning and testing
GB/T 12914 Paper and board—Determination of tensile properties
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
filtration performance
ability of filter paper to separate suspension into supernatant liquid and solid precipitation
4 Product classification
4.1 Chemical analysis filter paper is divided by their uses into qualitative filter paper and quantitative filter paper. Qualitative filter paper can be divided into three types according to different filtration rate: 101 (fast qualitative filter paper), 102 (intermediate qualitative filter paper) and 103 (slow qualitative filter paper); quantitative filter paper is also divided into three types according to the different filtration rate: 201 (fast quantitative filter paper), 202 (intermediate quantitative filter paper) and 203 (slow quantitative filter paper).
4.2 The qualitative filter paper and quantitative filter paper are classified into superior product, first-grade product and acceptable product based on the product quality.
5 Requirements
5.1 The technical indexes of qualitative filter paper shall be in accordance with those specified in Table 1.
Table 1
Item Requirements
Superior product First-grade product Acceptable product
Type 101 Type 102 Type 103 Type 101 Type 102 Type 103 Type 101 Type 102 Type 103
Quantitative g/m2 80.0 ± 4.0 80.0 ± 4.0 80.0 ± 5.0
Filtration performance — Passed
Filtration time s ≤35 >35~70 >70~140 ≤35 >35~70 >70~140 ≤35 >35~70 >70~140
Tensile strength (longitudinal) ≥ N/m 1200 1500 1500 1200 1500 1500 1200 1500 1500
Dry bursting resistance ≥ kPa 85 90 90 85 90 90 80 85 85
Wet bursting resistance ≥ mm water column 130 150 200 120 140 180 120 140 180
Alkali resistance≥ % 92.0 92.0 92.0 92.0 92.0 92.0 90.0 90.0 90.0
Ash≤ % 0.11 0.13 0.15
pH of aqueous extracts — 6.0~8.0
D65 brightness ≥ % 85.0
D65 fluorescence brightness % 0.5
Dust count ≤ 0.2mm2~0.3mm2 pcs/m2 70 80 90
>0.3mm2~0.7mm2 8 10 12
>0.7mm2 Not allowed Not allowed Not allowed
Delivery moisture % 7.0 ± 3.0
The technical indexes of quantitative filter paper shall be in accordance with those specified in Table 2.
Table 2
Item Requirements
Superior product First-grade product Acceptable product
Type 201 Type 202 Type 203 Type 201 Type 202 Type 203 Type 201 Type 202 Type 203
Quantitative g/m2 80.0 ± 4.0 80.0 ± 4.0 80.0 ± 5.0
Filtration performance — Passed
Filtration time s ≤35 >35~70 >70~140 ≤35 >35~70 >70~140 ≤35 >35~70 >70~140
Dry bursting resistance ≥ kPa 85 90 90 85 90 90 80 85 85
Wet bursting resistance ≥ mm Water column 130 150 200 120 140 180 120 140 180
Alkali resistance≥ % 95.0 95.0 95.0 95.0 95.0 95.0 93.0 93.0 93.0
Ash≤ % 0.009 0.010 0.011
pH of aqueous extracts — 5.0~8.0
D65 brightness ≥ % 85.0
D65 fluorescence brightness % 0.5
Dust count ≤ 0.2mm2~0.3mm2 pcs/m2 70 80 90
>0.3mm2~0.7mm2 8 10 12
>0.7mm2 Not allowed Not allowed Not allowed
Delivery moisture % 7.0 ± 3.0
5.3 Qualitative filter paper is divided into square one and round one. For the former, the size is generally 600 mm × 600 mm and 300 mm × 300 mm, the size deviation shall not exceed ±3 mm and the skewness shall not exceed 3 mm; for the latter, the diameter is generally 55 mm, 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 180 mm, 230 mm and 270 mm, and the diameter deviation shall not exceed ±1 mm. The round quantitative filter paper is common used. Its diameter is 55 mm, 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 180 mm, 230 mm and 270 mm, and diameter deviation shall not exceed ±1 mm. It is also allowed to produce qualitative and quantitative filter paper of other specifications and sizes according to the order contract.
5.4 The side cut of the paper shall be regular and clean and no burrs or cracks, etc. are found on its appearance.
5.5 The paper shall be uniform in fiber texture, and clean on its surface without visible metal impurities, sand grains, coal dust and other hard blocks. It is also not allowable to have folds, streaks, transparent points, pinholes, etc., or obvious hair slip.
Contents of GB/T 1914-2017
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation and storage
Annex A (Normative) Method for the determination of filtration performance
