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1、International Standard ) 607 0 a 4 4glib INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEXW HAPOfitlAfl OPAHM3Al.W IlO CTAHAAPT!43AtWlORGANlSATlON INTERNATIONALE DE NORMALISATION Surface active agents and detergents - Methods of sample division Agents de surface et dbtergents - Mkthodes de division
2、 d un Bchantillon First edition - 1980-04-01 Gi UDC 661.185: 620.113 Ref. No. IS0 607-1980 (E) e Descriptors : surfactants, detergents, sampling, test specimen conditioning, test equipment. 2 52 i? Price based on 7 pages Copyright International Organization for Standardization Provided by IHS under
3、license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 02:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (
4、IS0 member bodies). The work of developing Inter- national Standards is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental
5、 and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 607 was develop
6、ed by Technical Committee ISO/TC 91, Surface active agents, and was circulated to the member bodies in August 1978. It has been approved by the member bodies of the following countries : Australia Austria Belgium Bulgaria Chile Egypt, Arab Rep. France Germany, F. 13. Hungary of Iran Ireland Italy Ja
7、pan Korea, Rep. of Mexico Netherlands Portugal Romania South Africa, Rep. of Spain Switzerland United Kingdom USA USSR Yugoslavia No member body expressed disapproval of the document. This International Standard cancels and replaces IS0 Recommendation R 607-1967, of which it constitutes a technical
8、revision. 0 International Organization for Standardization, 1980 0 Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 02:21:54 MDTNo reproduction or networkin
9、g permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 607-1960 (E) Surface active agents and detergents - Methods of sample division 1 Scope and field of application 3.3 reduced sample : A sample that has been obtained by reducing the quantity of another sample without change of This
10、 International Standard specifies methods for obtaining a reduced sample of surface active agent or detergent suitable for use with single or mixed products, in the form of powders, pastes or liquids. composition. NOTE - It may also be necessary to reduce the particle size in the course of reducing
11、the quantity. The sample ing reasons reduction process may be required for the follow- a) the preparation of a final sample or a laboratory sample of mass greater than 250 g from a blended bulk sample of mass greater than 500 g; b) the preparation of several equivalent laboratory samples and/or refe
12、rence samples and/or storage samples, each of mass greater than 250 g, from a final sample; c) the preparation of a test sample from a laboratory sample. 3.4 final sample : A sample obtained or prepared under the sampling plan for possible subdivision into identical portions for testing, reference o
13、r storage. 3.5 laboratory sample : A sample as prepared for sending to the laboratory and intended for inspection or testing. 3.6 reference sample : A sample prepared at the same time as, and equivalent to, the laboratory sample, which is accep- table to the parties concerned, and retained for use a
14、s a laboratory sample if a disagreement occurs. 2 Reference IS0 6206, Chemical products for industrial use - Sampling - Vocabulary. 3.7 storage sample : A sample prepared at the same time as, and equivalent to the laboratory sample, and intended for possible future use as a laboratory sample. 3.8 te
15、st sample : A sample prepared from the laboratory 3 Definitionsl sample and from which test portions will be taken. 3.1 bulk sample : A collected set of samples which do not maintain their individual identities. 4 Principle 3.2 blended bulk sample : A collected set of samples Reduction of a bulk sam
16、ple by a mechanical process until a blended together to obtain a uniform bulk sample. reduced sample is obtained. I) Definitions based on IS0 6206. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for
17、 Resale, 04/25/2007 02:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 807-1980 (El 5 Procedure 5.1 Products in powder form The procedure specified is applicable to powders, including spray-dried powders, and particularly, those that contain ad- ditives that have
18、been introduced after the drying process. NOTES 1 In the case of powders containing additives introduced after drying, the physical mixture obtained has a tendency to separate. 2 In the case of washing powders, it is recommended that sampling be carried out under a ventilated hood; if necessary, a m
19、ask should be worn. 5.1.1 Apparatus Any satisfactory apparatus may be used, but the following types are recommended : 5.1.1.1 Conical divider (see figures 1 and 2) The apparatus shall be constructed in such a way that the two portions of the sample obtained from each dividing operation are quantitat
20、ively similar to each other and qualitatively representative of the original sample. An apparatus which satisfies these conditions is the conical divider (see figure I) which consists essentially of a hopper (A) from which the sample to be divided runs over the surface of a cone (B) whose apex is si
21、tuated directly beneath the centre of the lower opening in the hopper. The material running down the cone is diverted to series of receptacles arranged round the circumference of an inverted hopper (C) at the base of the cone (B). Alternate receptacles are connected to one or other of the two outlet
22、s at the bottom of the inverted hopper in order to provide two equivalent reduced samples. 5.1.1.2 Rotary sample divider (see figure 3) A suitable apparatusl) comprises a hopper from which the sam- ple falls in a thin stream onto a rotating platform carrying six, or more, identical receivers arrange
23、d symmetrically about the ver- tical axis of rotation so as to collect all of the falling sample. The frequency of rotation exceeds 40 mint. NOTE - Take care that the frequency of rotation of the platform is not too high if fine particles are present. 5.1.2 Preparation of the reduced sample using th
24、e conical divider (5.1.1.1) 5.1.2.1 Preparation of the final sample Place a receiver under each of the outlets of the conical divider. Fill the hopper and open the valve fully so as to allow the con- tents of the hopper to run over the cone, thus dividing the bulk sample into two portions one of whi
25、ch is deposited in each receiver. Retain one of these portions and discard the other. Pass a fresh quantity of bulk sample through the conical divider and repeat the operation until all the bulk sample has been divided. Clean the apparatus and again pass the retained portions, cor- responding to hal
26、f the bulk sample, through the apparatus as described above and repeat this operation until a reduced sam- ple of the required mass has been obtained. 5.1.2.2 Preparation of several equivalent samples If more than one sample is required, prepare sufficient reduced sample to obtain 2n equivalent samp
27、les where 2n equals or ex- ceeds the number of samples required. Subsequently, divide the reduced sample into 2n equal portions by means of the conical divider. Immediately place the whole of each portion in an airtight bottle or flask. 5.1.2.3 Preparation of test samples If test samples are require
28、d from the laboratory samples, treat the latter as specified in 5.1.2.1 and 5.1.2.2. The minimum mass of the test samples shall in no case be less than 10 g, otherwise there is a risk that the test samples may not be truly representative of the bulk sample and, hence, will be unsuitable for test pur
29、poses. 5.1.3 Preparation of the reduced sample using the rotary divider (5.1 .I .2) 5.1.3.1 Preparation of the final sample Place on the platform the complete set of receivers, one or more of which shall be clean and empty and shall bear some distinguishing mark. Fill the hopper. Set the rotating pl
30、atform in motion and allow the bulk sample to fall into the receivers at a uniform rate for at least 2 min. Retain the portion collected in the marked receiver(s) and discard the remainder. If the mass of the bulk sample is greater than the capacity of the divider, carry out the division in a series
31、 of operations. At the end of each operation, combine the sample portion(s) from the marked receiver(s) in a larger container, and continue using the same marked receiver(s) for subsequent divisions until all the sample has been divided. 1) Examples of commercially available apparatus are : - Pascal
32、 Rotary cascade sample divider; - Retsch type PT sample divider. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 02:21:54 MDTNo reproduction or networking permitted without lic
33、ense from IHS -,-,- IS0 607-1980 (E) Transfer the material collected from the marked receiver(s) to the hopper, and repeat this operation until a sample of the re- quired mass has been obtained. 5.1.3.2 Preparation of several equivalent samples If more than one sample is required, prepare sufficient
34、 reduced sample to obtain n equivalent samples, where n equals or ex- ceeds the number of samples required. Select an appropriate number, n, of marked receivers, and pass all of the reduced sample through the rotary divider. Im- mediately place the whole of each portion in an airtight bottle or flas
35、k. 5.1.3.3 Preparation of test samples If test samples are required from the laboratory samples, treat the latter as specified in 5.1.3.1 and 5.1.3.2. The minimum mass of the test samples shall in no case be less than 10 g, otherwise there is a risk that the test samples may not be truly representat
36、ive of the bulk sample. If the mass required is not a suitable fraction of the bulk sam- ple, it may be necessary to combine portions from successive stages of the division. For example, to reduce a sample of 280 g to 10 g using six receivers, the first division with two marked receivers provides 2
37、x 47 g. One of the portions may again be divided and two of the resulting portions may be added to the remaining 47 g to 2 give 47 + t ) 6 x 47 = 63 g. Passing this through the ap- paratus a third time will give reduced samples of approximately 10 g. 5.2 Products in paste form 5.2.1 Apparatus 5.2.1.
38、1 Scoop or spatula, for sampling. 5.2.1.2 Domestic mixer, provided with a beater, for blen- ding. It is not possible to specify a mixer suitable for all requirements and any suitable mixer may be used. In general, it shall be sufficiently powerful so that, when used with a beater of suitable design,
39、 the whole of the bulk sample is mixed and a creamy mass attained within 5 min. 5.2.2 Preparation of a reduced sample Warm the product (bulk sample or laboratory sample) in its ori- ginal container to 35 to 40 “C, and mix immediately using the domestic mixer (5.2.1.2) for 2 to 3 min until a homogene
40、ous mass is obtained. The paste shall not be removed from the original container before mixing as this may result in the production of a non- representative sample. It is therefore essential that the bulk sample is in a container which will allow mixing without transfer. The heating and mixing times
41、 shall be as short as possible so as to reduce to a minimum any change in the product. Using the spatula or scoop (5.2.1 .I), remove immediately the required quantity of sample and transfer it into an appropriate, pre- viously tared container, fitted with a stopper. Allow the contents of the contain
42、er to cool to ambient tempe- rature, and reweigh to obtain the mass of the reduced sample. NOTE - Contact of the paste with glass vessels readily causes separa- tion of a lye; therefore, once the sample is placed in the vessel, no part should be withdrawn to adjust the mass. There is a slight loss o
43、f moisture during mixing and weighing but experience has shown that, in practice, this is at an accep- table level. 5.3 Liquid products 5.3.1 Apparatus 5.3.1.1 5.3.1.2 5.3.1.3 Glass flasks or weighing pipettes, for sampling. Manual stirrer (for example, a glass rod). Mechanical stirrer. 5.3.2 Prepar
44、ation of a reduced sample 5.3.2.1 If the product (bulk sample or laboratory sample) is clear and apparently homogeneous, mix it with the manual stirrer (5.3.1.2); then, using the flask or weighing pipette (5.3.1 .I), remove immediately the quantity required for the reduced sample. As little foam as
45、possible shall be produced in the sample during mixing, and any loss of sample by evapora- tion shall be kept to a minimum. 5.3.2.2 If the product (bulk sample or laboratory sample) is cloudy or contains a sediment, mix it using the mechanical stirrer (5.3.1.3); then remove immediately the required
46、quantity of sample. 5.3.2.3 If the product (bulk sample or laboratory sample) con- tains a solid deposit, carefully warm the original container to about 30 OC until the sediment can be completely dispersed by stirring or until any crystals disappear, and remove immediately the required quantity of s
47、ample. 6 Storage of the reduced sample It is preferable for the analysis or test to be carried out as soon as possible after sampling but, if this is not possible and accor- ding to the intended purpose of the reduced sample, place it immediately in an airtight bottle or flask of glassor plastics ma
48、terials and determine and record its mass. (Do not use metal containers.) Take care that the reduced sample is preserved as far as possible in its original condition until the analysis or test is carried out. 3 Copyright International Organization for Standardization Provided by IHS under license wi
49、th ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 02:21:54 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 607-1990 (E) 7 Report c) the type of apparatus used; The report shall contain the following information : a) reference to the method used; d) any unusual features noticed during the division pro- cedures; b) the number of types of