This International Standard specifies the methods to be used for sampling and testing bone and skin glues in the form of powder, granules, pearls or cubes. NOTE 1 The methods may be extended to the testing of other forms of animal glues by suitable calculation of the equivalent dry glue content. The precision of the test methods included in this International Standard is not known because interlaboratory data are not available. When interlaboratory data are obtained, precision statements will be added to the corresponding test methods at the next revision. NOTE 2 For details of precision statements, refer to ISO 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Sampling
4.1 General
4.2 Initial selection of sample
4.3 Final selection of sample
5 Preparation of test sample
5.1 Reduction of solid (powdered, pearl, cube and granulated) glue sample
5.2 Concentrations for solid glues
5.3 Dissolving solid glues
6 Determination of moisture content
6.1 Principle
6.2 Apparatus
6.3 Procedure
6.4 Expression of results
6.5 Test report
6.6 Variation of gel strength and of viscosity with moisture content
7 Measurement of gel strength
7.1 Principle
7.2 Apparatus
7.3 Dissolving the sample
7.4 Chilling the solution
7.5 Procedure for determining gel strength
7.6 Expression of results
7.7 Test report
7.8 Validation of the test method
8 Comparison of gel strength
8.1 Principle
8.2 Apparatus
8.3 Procedure
8.4 Expression of results
8.5 Test report
9 Determination of viscosity
9.1 Method 1: Glass-capillary viscometer
9.2 Method 2: American pipette
10 Determination of softening point
10.1 General
10.2 Principle
10.3 Apparatus
10.4 Procedure
10.5 Expression of results
10.6 Test report
11 Determination of setting point
11.1 Principle
11.2 Apparatus
11.3 Procedure
11.4 Expression of results
11.5 Test report
12 Determination of foam
12.1 General
12.2 Principle
12.3 Apparatus
12.4 Procedure
12.5 Expression of results
12.6 Test report
13 Determination of pH
13.1 Principle
13.2 Procedure
13.3 Expression of results
13.4 Test report
14 Determination of grease content
14.1 Principle
14.2 Reagents
14.3 Procedure
14.4 Expression of results
14.5 Test report
15 Determination of ash
15.1 Principle
15.2 Apparatus
15.3 Procedure
15.4 Expression of results
15.5 Test report
16 Determination of keeping quality
16.1 General
16.2 Principle
16.3 Procedure
16.4 Expression of results
16.5 Test report
Annex A Instruments for determining gel strength (informative)