1、International Standard f! 2072 0 + 4 *!ig!B INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONMEYtlAPOAtiAfl OPAHH3AL alternatively, a suitable plastics material may be used. Use only ground glass or plastics (not rubber) stoppers. The apparatus specified in IS0 804, clause 5, and 5.1 Burette, graduated
2、 in 0,05 ml divisions, complying with the requirements of ISO/R 385. 5.2 pH meter. 5.3 Spectrophotometer, or 5.4 Photoelectric absorptiometer, fitted with filters ensur- ing maximum transmission at a wavelength of about 560 nm. 6 Procedure 6.1 Test portion Take an aliquot portion of the principal so
3、lution P prepared in accordance with IS0 804, sub-clauses 6.1, 6.2 and 6.3, con- taining 10 to 50 ug of ZnO, and place it in a beaker of suitable capacity (for example 250 ml). 6.2 Blank test Carry out a blank test at the same time as the determination, following the same procedure, on a solution pr
4、epared without the addition of extra-pure aluminium oxide, in accordance with IS0 804, sub-clause 6.4.2, using the same quantities of reagents as used for the determination. 2 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction
5、 or networking permitted without license from IHS-,-,-IS0 2072-1981 (E) 6.3 Preparation of the calibration graph 6.3.1 Preparation of standard calorimetric solutions, for photometric measurements carried out in cells of optical path length 1 cm By means of the burette (5.11, transfer into a series o
6、f seven beakers of suitable capacity (for example 100 ml), the volumes of the standard zinc solution (4.13) shown in the following table. Standard zinc solution (4.131 ml 0” I.0 70 38 48 5.0 3.0 Corresponding mass of ZnO L where b) the reference of the method used; m. is the mass, in grams, of the t
7、est sample taken for the preparation of the principal solution P; ml is the mass, in micrograms, of ZnO found in the aliquot portion of the test solution (6.4.1); m2 is the mass, in micrograms, of ZnO found in a cor- responding aliquot portion of the blank test solution (6.2); cl the results and the
8、 method of expression used; d) any unusual features noted during the determination; e) any operation not included in this International Stan- dard or in the International Standard to which reference is made, or regarded as optional. 4 Copyright International Organization for Standardization Provided
9、 by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 2072-1981 (I3 Annex IS0 publications relating to aluminium oxide primarily used for the production of aluminium IS0 802 - Preparation and storage of test samples. IS0 803 - Determinat
10、ion of loss of mass at 300 C (conventional moisture). IS0 804 - Preparation of solution for analysis - Method by alkaline fusion. IS0 805 - Determination of iron content - l,lO-Phenanthroline photometric method. IS0 866 - Determination of loss of mass at 1 006 T and 1 200 T. IS0 900 - Determination
11、of titanium content - Diantipyrylmethane photometric method. IS0 901 - Determination of absolute density - Pyknometer method. IS0 902 - Measurement of the angle of repose. IS0 903 - Determination of untamped density. IS0 1232 - Determination of silica content - Reduced molybdosilicate spectrophotome
12、tric method. IS0 1617 - Determination of sodium content - Flame emission spectrophotometric method. IS0 1618 - Determination of vanadium content - N-Benzoyl-N-phenylhydroxylamine photometric method. IS0 2069 - Determination of calcium content - Flame atomic absorption method. IS0 2070 - Determinatio
13、n of calcium content - Naphthalhydroxamic acid spectrophotometric method. IS0 2071 - Determination of zinc content - Flame atomic absorption method. IS0 2072 - Determination of zinc content - PAN photometric method. IS0 2073 - Preparation of solution for analysis - Method by hydrochloric acid attack
14、 under pressure. IS0 2828 - Determination of fluorine content - Alizarin complexone and lanthanum chloride spectrophotometric method. IS0 2829 - Determination of phosphorus content - Reduced phosphomolybdate spectrophotometric method. IS0 2865 - Determination of boron content - Curcumin spectrophoto
15、metric method. IS0 2926 - Particle size analysis - Sieving method. IS0 2927 - Sampling. IS0 2961 - Determination of an adsorption index. IS0 3396 - Determination of manganese content - Flame atomic absorption method. 5 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
