Express determination of iron microimpurities in technological solutions for growing KH₂PO₄ single crystals by visual test meth
Studied are the conditions for express determination of microamounts of iron with 4,7-diphenyl-1,10-phenanthroline (bathophenanthroline) in the form of ionic associate (IA) with NO3_ ions. A technique is proposed for pumping sorption of the IA from the solution by means of polyurethane foam. The sta...
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| Date: | 2004 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
| Published: |
НТК «Інститут монокристалів» НАН України
2004
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| Series: | Functional Materials |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/138814 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Express determination of iron microimpurities in technological solutions for growing KH₂PO₄ single crystals by visual test meth / T.I. Ivkova, R.P. Pantaler, A.B. Blank, E.A. Reshetnyak , Yu.Eu. Vakhovskaya // Functional Materials. — 2004. — Т. 11, № 2. — С. 294-299. — Бібліогр.: 14 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Studied are the conditions for express determination of microamounts of iron with 4,7-diphenyl-1,10-phenanthroline (bathophenanthroline) in the form of ionic associate (IA) with NO3_ ions. A technique is proposed for pumping sorption of the IA from the solution by means of polyurethane foam. The statistically calculated lower limit of the determined Fe (II, III) contents in the "unreliable reaction" region is 0.03 pg/ml, the determination time does not exceed 10 min, the relative standard deviation of the determination of 0.03 to 0.20 pg/ml of Fe (II, III) is 0.36 and 0.21, respectively (n = 30). The developed test is used for express visual determination of iron (II, III) at the level of 5 -10 5 % in the mother liquid for potassium dihydrogen phosphate crystal growth. |
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