ISO-1208-1982.pdf
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1、International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME)(CIYHAPOHAF OPI-AHMJAMR I-IO CTAHAPTM3AL otherwise, proceed directly as described in 8.3. 8.1 Test Portion 8.5 Separation of light fikh Ensure that the test portio Sample (final lot Sample). n is represen tative of the laborato
2、ry Break the material into smakl pieces, weigh, to the nearest OS g, 25 g sf the Sample and transfer it to a breaker (6.2). 8.1.2 Ground spices Waigh, to the nearest 0,l g, 25 g of the Sample and transfer it to a beaker (6.2). 8.2 reliminry remowal of d dat Add 200 ml of the light Petroleum (5.5) to
3、 the test Portion (8.1) in the beaker. Boil gently on a warm water bath for 15 min. Remove the light Petroleum by decanting, taking care not to lose any of the material under test. 8.3 Sepzwation of . is the mass, in grams, of the residue obtained (8.3). 9.2 Light filth (sec 8.6) Note the presence o
4、f matter of animal origin (see 8.6). If required, record separately the numbers of insect fragments, rodent hairs and other items of animal origin in the test Portion, i.e. the numbers per 25 g of Sample. 10 Test report The test report shall show the method used and the resuits ob- tained. lt shall
5、also mention any operating conditions not specified in this International Standard, or regarded as op- tional, as well as any circumstances that may have influenced the results. The test report shall include all the informa the complete identification of the Sample. tion necessary for Copyright Inte
6、rnational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 00:27:04 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1208-1982 (El Light Petroleum layer Water layer ,/” /A ,-
7、 Metal rod 1 AA Rubber stopper _,-,- Light Petroleum layer Nut (recessed into rubber stopper) Stopper lowered, for mixing, etc. Stopper raised, for trapping off Water layer Figure - Wildman trap flask (6.11, showing method of use NOTE - The upper nut and washer have been omitted. Copyright Internati
8、onal Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 00:27:04 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1208-1982 (EI Annex Pancreatin - AO General Pancreatin is a su
9、bstance containing enzymes, principally pan- creatic amylase, trypsin, and pancreatic iipase, obtained from the pancreas of the hog, Sus scrofa Linne var. domesticus Gray (Farn. Suidae), or of the ox, Bos taurus Linne (Farn. Bovidae). Pancreatin converts not less than 25 times its mass of N.F.* Pota
10、to Starch Reference Standard into soluble carbo- hydrates, and not less than 25 times its mass of casein into pro- teoses. Pancreatin of a higher digestive power may be brought to this Standard by admixture with lactose, or with sucrose con- taining not more than 3,25 % of starch, or with pancreatin
11、 of lower digestive power. A.1 Description Pancreatin occurs as a cream-coioured, amorphous powder, having a faint, characteristic, but not offensive odour. Pan- creatin changes Protein into proteoses and derived substances, and converts starch into dextrins and sugars. Its greatest ac- tivities are
12、 in neutral or faintly alkaline media; more than traces of mineral acids or large amounts of alkali hydroxides render it inert. An excess of alkali carbonate inhibits its action. A.2 Assay for fat Introduce 2 g of pancreatin into a flask of capacity about 50 ml, add 20 ml of diethyi ether, stopper,
13、and set it aside for several hours, mixing by rotating at frequent intervals. Decant the supernatant diethyl ether by means of a guiding rod into a plain filter Paper of diameter about 7 cm, previously moistened with diethyl ether, and collect the filtrate in a tared beaker. To the residue remaining
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- ISO 1208 1982
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