BS ISO 22608-2004 Protective clothing - Protection against liquid chemicals - Measurement of repellency retention and penetration of liquid pesticide formulations through protectiv.pdf

1、BRITISH STANDARD BS ISO 22608:2004 Protective clothing Protection against liquid chemicals Measurement of repellency, retention, and penetration of liquid pesticide formulations through protective clothing materials ICS 13.340.10 BS ISO 22608:2004 This British Standard was published under the author

2、ity of the Standards Policy and Strategy Committee on 12 July 2004 BSI 12 July 2004 ISBN 0 580 44040 0 National foreword This British Standard reproduces verbatim ISO 22608:2004 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committe

3、e PH/3, Protective clothing, to Subcommittee PH/3/3, Clothing for protection against chemicals, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international

4、or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to in

5、clude all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enq

6、uiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank

7、page, pages 1 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 22608:2004(E)INTERNATIONAL STANDARD ISO 22608 First edition 2004-07-01 Protective clo

8、thing Protection against liquid chemicals Measurement of repellency, retention, and penetration of liquid pesticide formulations through protective clothing materials Vtements de protection Protection contre les produits chimiques liquides Mesurage de la rpulsion, de la rtention et de la pntration d

9、es formulations de pesticides liquides travers les matriaux des vtements de protection BSISO22608:2004ii BSISO22608:2004ISO 22608:2004(E) iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references. 1 3 Terms and definitions. 1 4 Principle. 2 5 Apparatus. 3 5.1 Apparatus and materia

10、ls for contamination of test specimen. 3 5.2 Apparatus for analysis using Method A . 3 5.3 Apparatus and materials for analysis using Method B. 3 6 Test specimens. 6 7 Selection of analytical technique 7 8 Preparation of test apparatus and materials 7 8.1 Calibration of the pipettor 7 8.2 Preparatio

11、n of test assembly. 7 8.3 Conditioning of test specimen. 8 8.4 Testing temperature 8 9 Method A 8 9.1 Contamination of test specimen . 8 9.2 Calculation. 8 10 Method B 9 10.1 Verification of amount of active ingredient in test liquid applied 9 10.2 Determination of extraction efficiency 9 10.3 Testi

12、ng of blanks. 9 10.4 Contamination of test specimen . 10 10.5 Extraction of test liquids 10 10.6 Calculation. 10 11 Precision and bias 11 12 Test report 11 BSISO22608:2004ISO 22608:2004(E) iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national stan

13、dards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International org

14、anizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given

15、 in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75

16、 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 22608 was prepared by Technical Committee ISO/TC 94, Pers

17、onal safety Protective clothing and equipment, Subcommittee SC 13, Protective clothing. BSISO22608:2004ISO 22608:2004(E) vIntroduction The health and safety of workers involved in the mixing, loading and application of liquid pesticides can be affected by dermal exposure to liquid pesticide formulat

18、ions. Use of protective clothing can assist in minimizing the danger of contact with potentially harmful pesticides. Nonporous materials that provide excellent protection to the user are usually not suitable for many environments where there is a potential for heat stress. Therefore, garments made o

19、f porous materials that can provide a balance between risk from pesticide exposure and user comfort can be used as personal protective equipment (PPE) for workers. The movement of liquid pesticides through these materials is primarily due to penetration through spaces between fibres and interstices

20、between yarns. As these materials provide protection either by repelling or retaining liquid pesticide, the measurement of these properties are also important. This test method is used to measure repellency, retention, and penetration of liquid pesticides through protective clothing materials. BSISO

21、22608:2004BSISO22608:2004 1Protective clothing Protection against liquid chemicals Measurement of repellency, retention, and penetration of liquid pesticide formulations through protective clothing materials 1 Scope This International Standard specifies a test method to measure repellency, retention

22、 and penetration of a known volume of liquid pesticide when applied to protective clothing material. No external hydrostatic or mechanical pressure is applied to the test specimen during or after the application of the liquid pesticide. The degree of contamination depends on numerous factors such as

23、 type of exposure, application technique, and pesticide formulation. As the level of exposure can vary considerably, this method is designed to rate relative performance of personal protective equipment (PPE) materials at two levels of contamination. Low level of contamination is achieved by applyin

24、g 0,1 ml liquid formulation and high level by applying 0,2 ml. This test method does not measure resistance to permeation or degradation. This test method is suitable for field strength and concentrated pesticide formulations. This method may not be suitable for testing protective clothing materials

25、 against volatile pesticides formulations. This International Standard is applicable to the evaluation of materials that are new or those that have undergone treatment such as laundering, or simulated abrasion. Details of the treatment shall be reported. This test method can also be used to determin

26、e the resistance provided by protective clothing materials against penetration of new pesticide formulations. 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

27、, the latest edition of the referenced document (including any amendments) applies. ISO 2859-1:1999, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection 3 Terms and definitions For the purposes of this document

28、, the following terms and definitions apply. 3.1 analytical technique procedure whereby the concentration of the test chemical in a collection medium is quantitatively determined NOTE The procedure selected is based on the test liquid to be analysed. Applicable techniques include, but are not limite

29、d to, gas chromatography, high pressure liquid chromatography, gravimetric analysis, and radionuclide tagging/detection counting. 3.2 coated fabric flexible material composed of a textile fabric and an adherent polymeric or other material applied to one or both surfaces BSISO22608:2004ISO 22608:2004

30、(E) 2 3.3 test liquid mixture of raw materials, including but not limited to, active ingredients, inert ingredients and a base solvent used in pesticide formulation NOTE Additional ingredients could include emulsifiers and surfactants. Solvents used in the formulation could be water, isopropyl alcoh

31、ol, or petroleum distillate. Solid materials (powders, granules, etc.) may be dissolved or emulsified to form a liquid or suspension. These formulations may be ready to use or concentrates that require dilution to field strength. 3.4 penetration flow of a chemical through closures, porous materials,

32、 seams, and holes or other imperfections in a protective clothing material on a non-molecular level 3.5 permeation process by which a chemical moves through a protective clothing material on a molecular level NOTE Permeation involves a) sorption of molecules of the chemical into the contacted (outsi

33、de) surface of a material, b) diffusion of the sorbed molecules in the material, and c) desorption of the molecules from the opposite (inside) surface of the material. 3.6 liquid retention liquid retained in the protective clothing material under the conditions of this test 3.7 protective clothing m

34、aterial any material or combination of materials used in an item of clothing for the purpose of isolating parts of the body from a potential hazard NOTE For the purposes of this International Standard, protective clothing materials include those materials used in the construction of the suit or clot

35、hing that serve as the primary barrier for the wearer. Protective clothing materials do not include materials used in the construction of integral visors, gloves, and footwear. 3.8 liquid repellency characteristic to resist wetting and penetration by a liquid 4 Principle A test liquid is applied usi

36、ng a pipettor to the surface of the test assembly, which consists of single or multiple layer protective clothing material (test specimen) and an absorbent paper backed by polyethylene film (collector layer). After a specified time, another absorbent paper backed by polyethylene film (top layer) is

37、placed on the surface of the test specimen to remove the remaining liquid. The top layer, contaminated test specimen and the collector layer are separated. The amount of test liquid in each layer is measured either by gravimetric analysis (weighing) or by other appropriate analytical techniques. Met

38、hod A is a gravimetric method that measures the mass of the test liquid in each layer, whereas Method B is an analytical method that requires extraction of the test liquid and measures the mass of the active ingredient. Data is obtained to calculate percent repellency, pesticide retention, and penet

39、ration. BSISO22608:2004ISO 22608:2004(E) 35 Apparatus 5.1 Apparatus and materials for contamination of test specimen 5.1.1 Test liquid, to contaminate the test specimen. Magnetic or other stirrer shall be used for liquids that may settle during application. 5.1.2 Pipettor, with disposable pipette ti

40、p, mounted on a support stand, for pipetting (0,1 0,002) ml of liquid for low contamination level and (0,2 0,004) ml for high contamination level (see Figure 1). Multidispensing shall not be used for test liquids that may settle during application. NOTE Liquid viscosity, user experience and temperat

41、ure can affect accuracy and precision. Additional information on selection of pipettor can be obtained from the manufacturer. 5.1.3 Test specimen holder, consisting of a base plate 100 mm 100 mm (see Figure 2) and a cover plate 100 mm 100 mm with a 60 mm 60 mm opening in the centre (see Figure 3). T

42、he test specimen holder is made of polymethyl methacrylate (4 mm thickness) or other suitable material. The mass of the cover plate shall be 30 g to 35 g. 5.1.4 Timer, accurate to nearest 1 s. 5.1.5 Absorbent paper, two 80 mm 80 mm squares backed by polyethylene film per test specimen, one square of

43、 which is used to measure penetration, and the other to measure repellency, both having the following characteristics 1) : base mass: 160 g/m 2 thickness 590 m at 53 kPa and 710 m at 10 kPa typical water absorption value 75 mg/cm 2Substitutions are not recommended, because due to differences in sorp

44、tive properties; use of absorbent papers other than that specified may affect the test results. 5.1.6 Container, to discard contaminated materials. 5.2 Apparatus for analysis using Method A 5.2.1 Balance, accurate to the nearest 0,001 g. 5.2.1 Tweezers. 5.3 Apparatus and materials for analysis using

45、 Method B 5.3.1 Solvent, appropriate for extraction of pesticide. NOTE Selection of the solvent is dependent on the test liquid and the analytical method used. A minimum extraction efficiency of 95 % is required. Procedure to calculate extraction efficiency is given in 10.2. Solvent with high volati

46、lity may not be appropriate, as there may be evaporation loss during handling operations. 1) Benchkote Plus is the trade name of a polyethylene-backed absorbent paper manufactured by Whatman, available through scientific product suppliers or directly from Whatman (). This information is given for th

47、e convenience of users of this International Standard and does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to lead to the same results. BSISO22608:2004ISO 22608:2004(E) 4 5.3.2 Bottles, airtight chemically resistant flasks or bottle

48、s suitable for extraction of pesticides. Airtight chemically resistant bottles are also used for storage. 5.3.3 Tweezers. 5.3.4 Timer, accurate to nearest 1 s. 5.3.5 Graduated cylinder, (50 0,2) ml bottle-top dispenser or other apparatus for accurate measurement of solvent. 5.3.6 Orbital shaker, cap

49、able of (200 20) r/min. Key 1 clamp for support stand 2 pipettor 3 disposable tip 4 distance between the tip and the centre of test specimen 5 test specimen 6 100 mm 100 mm cover plate with 60 mm 60 mm opening 7 100 mm 100 mm base plate Figure 1 Schematic diagram for placement of pipettor and test assembly BSISO22608:2004ISO 22608:2004(E) 5Dimensions in millimetres Characteristics 100 mm 100 mm plate 80 mm 80 mm markin