1、International Standard f 6382 0 *am, 4 INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONMEYHAPOAHAR OPrAHbl3ALblR 1l0 CTAHAAPTM3AUHMeORGANlSATlON INTERNATIDNALE DE NORMALlSATlON General method for determination of silicon content - Reduced molybdosilicate spectrophotometric method M The test report sha
2、ll contain the following particulars : a) an identification of the sample; b) the reference of the general method used and of the International Standard relating to the product concerned; d) any unusual features noted during the determination; e) any operation not included in this International Stan
3、- dard or in the International Standards to which reference is made in annex B, or regarded as optional. 4 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 6382-1981 (
4、El Annex A Interferences WARNING - This annex is not exhaustive. It is, therefore, necessary to check the possible interference from ions, elements or com- pounds not given in the table. Ion, element or compound H+ Na+ K+ Fez+ Zn*+ uo;+ Al3+ Fe3 + Ass+ -WA Anionic surface active agents Non-ionic sur
5、face active agents Limit of interference Ion, element or compound Does not interfere 300 mg F- 250 mg 140 mg CI- 300 mg 250 mg 70 mg vo, 140 mg 0.05 mg so;- 1600 mg Does not interfere PO!- Interferes* . . . . , . . e . . Limit of interference 40 mg 600 mg 25 mg 600 mg 15 mg -* _. , . . . . I- I I *
6、The effect of non-ionic surface achve agents can toe neutralrzed by me actanton of antontc surtace acttve agents. I nus, me aaamon OT o ml OT a 5 g/l solution of sodium lauryl sulphate solution will suppress interference by non-ionic surface active agents, expressed as NPlO (lo-ethoxylated nonyl phe
7、nol), for contents up to 0,15 g in aliquot portions of the test solution. Annex B Other publications of ISO/TC 47 relating to determination of silicon content by reduced molybdosilicate photometry IS0 994 - Sodium hydroxide for industrial use. IS0 995 - Potassium hydroxide for industrial use. IS0 12
8、32 - Aluminium oxide primarily used for the production of aluminium. IS0 1620 - Cryolite, natural and artificial. IS0 2369 - Aluminium fluoride for industrial use. IS0 3361 - Phosphoric acid for industrial use. IS0 3430 - Sodium fluoride primarily used for the production of aluminium. IS0 3701 - Anhydrous hydrogen fluoride for industrial use. IS0 5439 - Acid-grade fluorspar. 5 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
