PHOTOMETRIC METHOD FOR DETERMINING A SMALL AMOUNT OF ZIRCONIUM IN IRON AND STEEL BY USING PYROCATECHOL VIOLET (in Japanese)
A simple and accurate absorption photometric method for determining a small amount of zirconium in iron and steel was devised; the method employs pyrocatechol violet. When the sample is decomposed with perchloric acid and reduced with sodium bisulphite, zirconium is coprecipitated with a small amount of iron as cupferrate. This precipitate is decomposed by nitric acid and perchloric acid. After ethylenediamine tetrsacetic acid is added, the pH is ad- justed to 5.0 by the use of an acetate buffer solution. It is colored by adding pyrocatechol violet, and the light absorbancy is measured at 575 m mu against the blank.. When iron is previously separated by the ether extraction or mercury cathode electrolysis methods for a sample having a high content of arsenic or phosphorus, a portion of zirconium will be lost, giving a too low value. (auth)
- Research Organization:
- Muroran Plant, Japan Steel Works, Ltd.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-020675
- OSTI ID:
- 4053499
- Journal Information:
- Bunseki Kagaku (Japan), Journal Name: Bunseki Kagaku (Japan) Vol. Vol: 10; ISSN BNSKA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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