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GB/T 20405.1-2023: Urine-absorbing aids for incontinence - Polyacrylate superabsorbent powders - Part 1: Test methods for determination of pH
Status: Valid GB/T 20405.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20405.1-2023 | English | 204 |
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Urine-absorbing aids for incontinence - Polyacrylate superabsorbent powders - Part 1: Test methods for determination of pH
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GB/T 20405.1-2023
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| GB/T 20405.1-2006 | English | 279 |
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Urine-absorbing aids for incontinence -- Test methods for characterizing Polymer-based absorbent materials -- Part 1: Determination of pH
| Obsolete |
GB/T 20405.1-2006
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PDF similar to GB/T 20405.1-2023
Basic data | Standard ID | GB/T 20405.1-2023 (GB/T20405.1-2023) | | Description (Translated English) | Urine-absorbing aids for incontinence - Polyacrylate superabsorbent powders - Part 1: Test methods for determination of pH | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | C45 | | Classification of International Standard | 11.180.20 | | Word Count Estimation | 11,114 | | Date of Issue | 2023-11-27 | | Date of Implementation | 2024-06-01 | | Older Standard (superseded by this standard) | GB/T 20405.1-2006 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 20405.1-2023: Urine-absorbing aids for incontinence - Polyacrylate superabsorbent powders - Part 1: Test methods for determination of pH
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 11:180:20
CCSC45
National Standards of People's Republic of China
Replace GB/T 20405:1-2006
Urine absorbent polyacrylate high absorbency for incontinence patients
Aqueous powders Part 1: Determination of pH value
(ISO 17190-1:2020,IDT)
Published on 2023-11-27
2024-06-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
PrefaceⅠ
Introduction II
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Principle 1
5 Reagents and Materials 2
6 device 2
7 Condition 3
8 sampling 3
9 Step 4
10 calculation 4
11 Report 4
12 Accuracy 5
Reference 6
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document is Part 1 of GB/T 20405 "Urine absorbent polyacrylate super absorbent powder for incontinence patients":
GB/T 20405 has released the following parts:
---Part 1: Determination method of pH value;
---Part 2: Test method for determining the residual amount of acrylate monomer;
---Part 3: Test method for determination of particle size distribution by sieving method;
---Part 4: Determination of moisture content by weight loss on heating method;
---Part 5: Determination of water absorption in physiological saline by weighing method:
This document replaces GB/T 20405:1-2006 "Test methods for properties of polymer matrix absorbent materials for urine absorbents for incontinence patients"
Part 1: Determination of pH value", compared with GB/T 20405:1-2006, in addition to structural adjustments and editorial changes, there are major technical changes
as follows:
a) The mixing speed and time were changed, the solidification time of the polymer gel was increased, and the pH of the supernatant liquid after the electrode was immersed
The recording interval is set to 30s (see Chapter 9, Chapter 7 of the:2006 edition);
b) Removed the requirement for repeated testing (see Chapter 8 of the:2006 edition);
c) Changed the statistical results of inter-laboratory tests to the analysis and statistical evaluation of new laboratory test data (see Section 12
Chapter 8 and Appendix A of the:2006 edition):
This document is equivalent to ISO 17190-1:2020 "Urine absorbent polyacrylate super absorbent powder for incontinence Part 1:
Method for measuring pH value:
Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:
This document is proposed by the Ministry of Civil Affairs of the People's Republic of China:
This document is under the jurisdiction of the National Standardization Technical Committee for Rehabilitation and Special Equipment for Disabled Persons (SAC/TC148):
This document was drafted by: China Assistive Devices Center for Disabled Persons, Chinese Institute of Rehabilitation Sciences, and Shaanxi Medical Device Quality Inspection Institute:
The main drafters of this document: Zhang Jian, Chen Xiaodong, Zhou Mi, Wang Qi, Li Jun, Xiu Chunyang, and Wu Guoxing:
The previous versions of this document and the documents it replaces are as follows:
---First published as GB/T 20405:1-2006 in:2006;
---This is the first revision:
Introduction
Polymer matrix absorbent materials are required in urine absorption assistive devices for infants, the elderly, and paralyzed and incontinent patients: gather
Acrylic super absorbent powder is a kind of urine absorbent for incontinence patients: The pH value is a characteristic of this absorbent material:
The GB/T 20405 series of test methods are suitable for the detection of polyacrylate super absorbent powders in sanitary products, including those for incontinence
Material testing of urine absorption aids: These test methods are designed specifically for testing materials and are not intended for use with, and are not applicable to, finished urine absorption aids:
Instrument testing:
GB/T 20405 is planned to consist of 11 parts:
---Part 1: Determination method of pH value: The purpose is to provide the determination of pH value of powdered highly water-absorbent polyacrylate:
method:
---Part 2: Test method for determining the residual amount of acrylate monomer: The purpose is to provide a method for determining the highly water-absorbent polyacrylate powder:
Test method for the total amount of sodium acrylate and acrylic acid remaining in the final product (expressed as acrylic acid):
---Part 3: Test method for determination of particle size distribution by sieving method: The purpose is to provide a method for measuring particle size not larger than 850μm
Test method for particle size distribution of cross-linked polyacrylate super absorbent powders:
---Part 4: Determination of moisture content by weight loss on heating method: The purpose is to provide a cross-linked polyacrylate highly water-absorbent powder
Determination method of weight loss on heating when moisture content is between 0% and 5%:
---Part 5: Determination of water absorption in physiological saline by weighing method: The purpose is to provide a polyacrylate highly water-absorbent powder
Method for determination of swelling capacity in physiological saline:
---Part 6: Determination of the liquid retention rate of physiological saline after centrifugation by weighing method: The purpose is to provide a method for determining the high water absorption of polyacrylate
A method for determining the ability of a powder to retain salt solution after centrifugation:
---Part 7: Determination of liquid suction volume under pressure by weighing method: The purpose is to provide high water absorbency of polyacrylate under specific pressure
Method for determination of absorption of salt solution by powder:
---Part 8: Determination of flow rate by weighing method: The purpose is to provide a method for measuring the mass flow rate of polyacrylate highly water-absorbent powder:
---Part 9: Determination of density by weighing method: The purpose is to provide highly water-absorbent polyacrylate used in urine absorption assistive devices for incontinence
Method for determination of powder density:
---Part 10: Determination of extractable polymer content by potentiometric titration: The purpose is to provide polyacrylate highly water-absorbent powder that can be used in salt
Method for determining the mass fraction of carboxylic acid groups of different chain lengths extracted from water:
---Part 11: Determination of respirable particle content: The purpose is to provide polyacrylate highly water-absorbent powder inhalable particles containing
Quantity measurement method:
Urinary absorbent polyacrylate high absorbency for incontinence patients
Aqueous powders Part 1: Determination of pH value
Warning---This document does not purport to resolve any security issues related to its use: Users of this document are responsible for proceeding with their use
Implement appropriate safety and health practices and determine the applicability of regulatory restrictions: Personnel performing testing should be fully trained in all aspects of this procedure
training:
1 Scope
This document describes a method for the determination of the pH of highly water-absorbent polyacrylates in powder form:
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations
files, only the version corresponding to that date applies to this document: For undated referenced documents, the latest version (including all amendments) applies to
this document:
ISO 187 Standard atmospheric conditions for handling and testing of paper, paperboard and pulp specimens and procedures for monitoring atmospheric conditions and specimen handling
Note: GB/T 10739-2002 Standard atmospheric conditions for handling and testing of paper, paperboard and pulp samples (ISO 187:1990, EQV)
andtestmethods)
Note: GB/T 6682-2008 Specifications and test methods for water used in analytical laboratories (ISO 3696:1987, MOD)
ISO 10523 Determination of pH value of water quality (Waterquality-DeterminationofPH)
Note: GB/T 22592-2008 General principles for determination of pH value of water treatment agents (ISO 10523:1994, NEQ)
3 Terms and definitions
The following terms and definitions apply to this document:
3:1
sample sample
A product or part of a product extracted from a production batch for testing purposes that is identifiable and traceable to its origin:
4 Principles
Use a pH meter and use the standard pH-responsive glass electrode method to measure the concentration of physiological saline after adding polyacrylate super absorbent powder:
pH value:
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