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1、INTERNATIONAL STANDARD IS0 18414 First edition 1996-07-o 1 Meat and meat products - Determination of chloride content - Part 1: Volhard method Viande et produits ;j base de viande - D V, is the volume, in millilitres, of the potassium thiocyanate solution (4.6) used in the deter- mination (8.3); V2
2、is the volume, in millilitres, of the potassium thiocyanate solution (4.6) used in the blank test (8.4); c is the concentration of the potassium thio- cyanate solution (4.6), in moles per litre; m is the mass, in grams, of the test portion. Report the result to the nearest 0,05 % (m/m). 10 Precision
3、 The precision of the method has been established by an interlaboratory test (see reference 4), carried out in accordance with IS0 5725. For the values obtained for the repeatability limit, r, and the reproducibility limit, R, a probability level of 95 % holds. 10.1 Repeatability The absolute differ
4、ence between two independent single test results, obtained using the same method on identical test material in the same laboratory by the same operator using the same equipment within a short interval of time, should not be greater than 0,15 % (m/m) for sodium chloride contents between 1 ,O % and 2,
5、0 %; 0,20 % (m/m) for sodium chloride contents greater than 2,0 %. 10.2 Reproducibility The absolute difference between two single test re- sults, obtained using the same method on identical test material in different laboratories with different operators using different equipment, should not be gre
6、ater than: 0,20 % (m/m) for sodium chloride contents between I,0 and 2,0 %; 0,30 % (m/m) for sodium chloride contents greater than 2,0 %. 11 Test report The test report shall specify: - the method in accordance with which sampling was carried out, if known; - the method used; - the test result(s) ob
7、tained; and - if the repeatability has been checked, the final quoted result obtained. It shall also mention all operating details not specified in this part of IS0 1841, or regarded as optional, together with details of any incidents which have in- fluenced the test result(s). The test report shall
8、 include all information necessary for the complete identification of the sample. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 00:06:45 MDTNo reproduction or networking perm
9、itted without license from IHS -,-,- IS0 1841-1:1996(E) Annex A (informative) Bibliography I I IS0 3100-I :1991, Meat and meat products - nach Par. 35 LMBG. Bestimmung des Kochsalz- Sampling and preparation of test samples - gehaltes in Fleisch und Fleischerzeugnissen. Part 1: Sampling. L 06.00-5, S
10、eptember 1980. 2 IS0 5725:1986, Precision of test methods - De- 141 BELJAARS, P.R and HORWITZ, W, Comparison of termination of repeatability and reproducibility for the Volhard and potentiometric methods for the a standard test method by inter-laboratory tests determination of chloride in meat produ
11、cts: Col- (now withdrawn) was used to obtain the precision laborative study. J. Assoc. Off. Anal. Chem., 68, data. 1985, pp. 480-484. 3 Amtliche Sammlung von Untersuchungsverfahren Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical
12、 Standards 1/9972545001 Not for Resale, 04/26/2007 00:06:45 MDTNo reproduction or networking permitted without license from IHS -,-,- This page intentionally left blank Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1
13、/9972545001 Not for Resale, 04/26/2007 00:06:45 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 1841-1:1996(E) ICS 67.120.10 Descriptors: agricultural products, animal products, food products, meat, meat products, chemical analysis, determination of content, chlorides. Price based on 4 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 00:06:45 MDTNo reproduction or networking permitted without license from IHS -,-,-
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