ISO 17190-2:2021 Urine-absorbing aids for incontinence — Polyacrylate superabsorbent powders —Part 2: Test method for determination of the amount of residual acrylate monomers

标准简介

Urine-absorbing aids for incontinence — Polyacrylate superabsorbent powders —Part 2: Test method for determination of the amount of residual acrylate monomers是ISO于2021-02发布的ISO标准，适用于全球范围。

标准截图

 

标准文档说明

标准文档类型为Urine-absorbing aids for incontinence — Polyacrylate superabsorbent powders —Part 2: Test method for determination of the amount of residual acrylate monomers高清PDF版本（文字版），标准文档内可进行搜索，可以复制原文，可粘贴。

标准部分原文

INTERNATIONAL STANDARD ISO 17190-2:2021(E)

Urine-absorbing aids for incontinence — Polyacrylate superabsorbent powders —

Part 2: Test method for determination of the amount of residual acrylate monomers

WARNING — This document does not claim to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. It is expected that the person performing this test has been fully trained in all aspects of this procedure.

1 Scope

This document provides a test method for determining the sum of residual monomeric sodium acrylate and acrylic acid present in polyacrylate superabsorbent powders as acrylic acid.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 187, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples

ISO 3696, Water for analytical laboratory use — Specification and test methods

3 Terms a nd definiti ons

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp

— IEC Electropedia: available at http:// www .electropedia .org/ 3.1

amount of residual monomers

sum of residual monomeric sodium acrylate and acrylic acid

3.2

sample

product or portion of a product taken from a production lot for testing purposes and identifiable and traceable back to its origin

3.3

specimen

specific portion of the identified sample (3.2) upon which a test is performed

ISO 17190-2:2021(E)

4 Principle

Residual monomeric sodium acrylate and acrylic acid are extracted from the polyacrylate superabsorbent powders and the amount determined as residual acrylate monomer by HPLC.

The method described here uses a simple 1 g in 200 ml dilution factor. However, it is equally valid to use different masses and volumes as long as the mass: volume dilution ratio is the same and suitable experimental validation is performed.

5 Reagents and materials

Use only reagents of recognized analytical grade, unless otherwise specified.

5.1 Water.

Grade 1 water according to ISO 3696, for the standard solutions for the calibration and Grade 3 water according to ISO 3696, with the exception that the conductivity can be as high as 30 μS/cm, for the saline solution.

5.2 Sodium chloride solution.

5.2.1 0,9 % mass fraction of sodium chloride solution in water. Weigh (9,00 ± 0,01) g of sodium chloride into a 1 l beaker and add (991,0 ± 0,1) g of deionized water (grade 3). Stir until dissolved.

5.2.2 The conductivity of the solution should be checked prior to each use using properly calibrated measuring equipment. The expected conductivity of a 0,9 % saline solution is of the order of 1600 S/m (depending on temperature). Each testing lab shall determine the correct conductivity for the conditions obtaining in the lab. It is also recommended that the temperature of the solution be maintained at (23 ± 2) °C for the duration of the test. As this matches the required laboratory temperature it is not necessary to record the solution temperature.

5.3 Phosphoric acid.

Concentrated c(H P0 ) = 85 % by mass, of HPLC grade or better.

3 4

5.4 Phosphoric acid solution.

c(H PO ) = 0,1 % by mass (1 g/l or 0,0087 mol/l). Dilute concentrated H PO to volume with deionized 3 4 3 4

water (grade 1). Stir until dissolved.

5.5 Acetonitrile.

HPLC grade or better.

5.6 Acrylic acid.

Greater than 99,5 % purity.

Acrylic acid degrades over time owing to slow polymerization, particularly dimerization, and water uptake. It is important to obtain acrylic acid that meets the purity required for this test method. It is not recommended to obtain the reference substance from a laboratory chemicals distributor as the purity of this material from such a source is likely to be defined inaccurately.

网盘链接

百度网盘：https://pan.baidu.com/s/16egf4v3DDP3bjy0yJz-UhA
提取码：ucw5