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Title: RAPID DETERMINATION OF Zn IN Al ALLOYS BY EDTA TITRATION METHOD (in Japanese)

Abstract

Zinc in the presence of aluminum and tin was titrated with EDTA. To avoid the interference of aluminum and tin, NH/sub 4/F was used. The method was successfully applied to the determination of zinc in aluminum alloys. The procedure is as follows: Weigh a 2 g sample into a beaker and dissolve it in 30ml of 20% NaOH solution and 5ml of 30% H/sub 2/O/sub 2/. After boiling out the excess H/sub 2/O/sub 2/, add Na/sub 2/S solution, cool, dilute to volume in a 500- ml volumetric flask, and filter through a dry filter paper. Fe, Mn, Cu, Ni, Ti, Ca, Mg, etc., remain on the filter paper as hydrous oxides or sulfides. Pipet 10 to 50 ml of the filtrate into a beaker and dilute to about 70ml with water. Make it slightiy acid with HCl and 3 g of NH/sub 4/F (to mask aluminum and tin) and 5ml of 50% CH/sub 3/COONH/sub 4/ solution. Adjust the solution to a pH of 5 to 6 with 1 to 1 NH/sub 4/OH. Heat at 70 to 80 deg C, add 3 to 4 drops of indicator (PAN), mix and titrate with 0.005M EDTA solution. Then back-titrate the excess EDTA withmore » 0.005M CuSO/sub 4/ solution. (auth)« less

Authors:
Publication Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4078380
NSA Number:
NSA-15-005968
Resource Type:
Journal Article
Journal Name:
Nippon Kinzoku Gakkaishi (Japan)
Additional Journal Information:
Journal Volume: Vol: 24; Other Information: Orig. Receipt Date: 31-DEC-61
Country of Publication:
Country unknown/Code not available
Language:
Japanese
Subject:
CHEMISTRY; ACETATES; ALUMINUM ALLOYS; AMMONIUM COMPOUNDS; BOILING; CALCIUM; COOLING; COPPER; COPPER SULFATES; EDTA; FILTERS; FLUORIDES; HYDROCHLORIC ACID; HYDROGEN PEROXIDES; HYDROXIDES; IRON; MAGNESIUM; MANGANESE; NICKEL; PAPER; QUANTITATIVE ANALYSIS; SODIUM HYDROXIDES; SODIUM SULFIDES; SOLUTIONS; SULFIDES; TEMPERATURE; TIN; TITANIUM; USES; ZINC

Citation Formats

Wakamatsu, S. RAPID DETERMINATION OF Zn IN Al ALLOYS BY EDTA TITRATION METHOD. Country unknown/Code not available: N. p., 1960. Web.
Wakamatsu, S. RAPID DETERMINATION OF Zn IN Al ALLOYS BY EDTA TITRATION METHOD. Country unknown/Code not available.
Wakamatsu, S. Fri . "RAPID DETERMINATION OF Zn IN Al ALLOYS BY EDTA TITRATION METHOD". Country unknown/Code not available.
@article{osti_4078380,
title = {RAPID DETERMINATION OF Zn IN Al ALLOYS BY EDTA TITRATION METHOD},
author = {Wakamatsu, S},
abstractNote = {Zinc in the presence of aluminum and tin was titrated with EDTA. To avoid the interference of aluminum and tin, NH/sub 4/F was used. The method was successfully applied to the determination of zinc in aluminum alloys. The procedure is as follows: Weigh a 2 g sample into a beaker and dissolve it in 30ml of 20% NaOH solution and 5ml of 30% H/sub 2/O/sub 2/. After boiling out the excess H/sub 2/O/sub 2/, add Na/sub 2/S solution, cool, dilute to volume in a 500- ml volumetric flask, and filter through a dry filter paper. Fe, Mn, Cu, Ni, Ti, Ca, Mg, etc., remain on the filter paper as hydrous oxides or sulfides. Pipet 10 to 50 ml of the filtrate into a beaker and dilute to about 70ml with water. Make it slightiy acid with HCl and 3 g of NH/sub 4/F (to mask aluminum and tin) and 5ml of 50% CH/sub 3/COONH/sub 4/ solution. Adjust the solution to a pH of 5 to 6 with 1 to 1 NH/sub 4/OH. Heat at 70 to 80 deg C, add 3 to 4 drops of indicator (PAN), mix and titrate with 0.005M EDTA solution. Then back-titrate the excess EDTA with 0.005M CuSO/sub 4/ solution. (auth)},
doi = {},
url = {https://www.osti.gov/biblio/4078380}, journal = {Nippon Kinzoku Gakkaishi (Japan)},
number = ,
volume = Vol: 24,
place = {Country unknown/Code not available},
year = {1960},
month = {1}
}