ANSI-IT4.155-1981-R2001.pdf
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1、ANWNAPM IT4.155-1981 (Rl996) Reatfination and redeslgnation of ANSI PH4.155-1981 (R1987) R e W n of ANSI PH4.155-1974 f American National Standard 7 for Photography (Chemicals) - Aluminum Sulfate Solution Secretariat National Association of Photographic Manufacturers, Inc J Approved January 16, 1981
2、 Reaffirmed July 16, 1996 Page 1 of 3 pages Foreword (This Forerord is not a part of Amencan National Standard Specification for Photographic Grade Aluminum Sulfate Solu- tion, ANSI PH4 155-1981.) This standard is one of a series that establislies the inin- imum criteria of purity for clieniicals us
3、ed in processing photographic iiiaterials However. if the purity of a coniirionly available grade of chernical cucceds the iiiiii- iinuin criteria arid if there is no ecoiioini: peiiliity in its use, the purity requireiiieiiis have heeii st to take ad- vantage of the higher quality iiiacri;lI. Altho
4、ugh rlie ultiiiiate criterion for suitability o f a photogi-apliic grade cliriiiical is Its uccessful perfoi- inance iii an appropriate photographic use test. the shorter. inore ecoiioiiiical tests described herein are generally adequate. This standard is a revision of.4iiirricari Natioiial Standard
5、 SpeciBcation for Photographic Grade Aluiiii- num Sulfate Solution. AI2(SO4 ) 3 . ASSI Pii4 155- 1974. I n this latest revision, precautions have beeii edi- torially corrected. and Section I has been expanded 1. Scope This standard establishes criteria for the purity of photographic grade aluniiiiur
6、ii sulfate solution and de- scribes the tests to be used to deteriiiirie the purity. 2. General Infomation 2.1 Physical Appearance. Aluitiiriiiiii sulfate solution is usually clear and colorless. The iiiolecular weight ot anhydrous aluiiiiriuiii sulfate is 343. i 5 2.2 Hazardous Properties. Aluniinu
7、ni sulfate solution is very low in toxicity and is noncoiiibustible. 2.3 Handling and Storage. No special precautions are required. 3. Summary of Requirements Assay as Alz(S04), by weight Specific Gravity ( a t ?O/O“O. Appearmcr of Solutioii Free .4lkaliiiity and Free Acidity. 18.1% max 76.87 inin I
8、 333 iiiax i .3 14 niin To pass test 0.70,+ iiiax as 0. 10% iiiax as H2 so4 0.0 1 7 inax .A12 0, Heiivy Metals ( 3 s Pb ) Iron ( Fe) 0.0055 rnax 4. Test Sainples. Reagents, Solutions, aiid Hazards 4.1 Sainples. Tests shall he iiiade on saiiiples in their “as received“ condition 4.2 Punty of Reagents
9、 meet the specifications given in Reagent Chemicals, published by the American Cheniical Society in 1974, wherever such specifications have been established. If no American Cheniical Society specification exists, the 4.2.1 Reagents used in the test procedures shall Available from American Cheinical
10、Society, 1155 Sixteenth Street, NW, Washington, D C. 20036. C A U T I O N NOTICE This American National Standard may be revised or withdrawn at any time The procedures of the American National Standards Insti- tute require that action be taken to reaffirm. revise. or withdraw this standard no later
11、than five years from the date of publication Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute Printed in USA COpyrQht O 1981 by American National Standards Institute, 11 West 42nd Street, New Yo
12、rk, N.Y. 10036 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/09/2007 01:37:08 MDTNo reproduction or networking permitted without license from IHS -,-,- Page 2 of 3 pages 5. Test Procedu
13、res i. Specific Gravit! (at zo O O C ) ( 1.333 11i3xi11iuiii. 1 3 14 iiiiiiiiiiiiiii I 8. Appearance of Soliitioii (To pass fest) ANSVNAPM lT4.155-1981 (R199) Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100
14、 Not for Resale, 05/09/2007 01:37:08 MDTNo reproduction or networking permitted without license from IHS -,-,- Page 3 of 3 pages 9. Free Alkalinity and Free Acidity (0.2maximumasA1203,0.1070maximumasH2S04) Dissolve 3 grains 2 0. i grairi of sodiuiii 50 niL of hot water in a 125-niL conical flask and
15、 add 3 drops of 1 0% phenolphthalein (10 g/L alcohol solu- tion). Carefully neutralize. using 0. 1 IV sodium hydrox- ide4 or 0.1 N hydrochloric a i d . . To 5.0 grams 50.1 graiii of sample in a 250-iiiL conical flask, add 3 boiling chips, 10 iiiL of water, and 25.0 iiiL of 0. i N sulfuric acid.4 Hea
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