You need JavaScript to view this

Study of extraction-spectrophotometric micro-determination of boron with methylene blue and its application

Technical Report:

Abstract

A sensitive extraction-spectrophotometric method for microdetermination of boron with methylene blue was investigated. The method was based on the extraction of a BF{sub 4}{sup -}-methylene blue complex into dichloroethane. Boron was determined directly by measuring the absorbance at 658 nm. The calibration graph was linear over the range of 2.5 x 10{sup -9} to 8 x 10{sup -8} g/mL. The blank, mechanism of the reactions, interference of other ions and some optimum conditions of the method were studied in detail. The main source of the blank resulted from methylene blue and the complex of F{sup -}-methylene blue. In order to reduce the blank, the amounts of methylene blue, H{sub 2}SO{sub 4} and HF were used as less as possible. Only one to one complex BF{sub 4}{sup -}-methylene blue was formed in the medium of H{sub 2}SO{sub 4}. About 90% of methylene blue and F{sup -}-methylene blue complex was removed with 5 ml of water and only a little amount of BF{sub 4}-methylene blue complex was decomposed. The extraction-spectrophotometric method with methylene blue was first applied to the microdetermination of boron in sodium metal and UF{sub 6}. The sample of sodium metal was taken and weighed in the glovebox filled with  More>>
Authors:
Daohong, Zhu [1] 
  1. Academia Sinica, Beijing, BJ (China). Inst. of Atomic Energy
Publication Date:
Aug 01, 1990
Product Type:
Technical Report
Report Number:
CNIC-00442; IAE-0083.
Reference Number:
SCA: 400102; 050400; PA: AIX-23:010556; SN: 92000637537
Resource Relation:
Other Information: PBD: Aug 1990
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; BORON COMPLEXES; SOLVENT EXTRACTION; SPECTROPHOTOMETRY; ACCURACY; BORON; METHYLENE BLUE; QUANTITY RATIO; SODIUM; SULFURIC ACID; TRACE AMOUNTS; URANIUM HEXAFLUORIDE; 400102; 050400; CHEMICAL AND SPECTRAL PROCEDURES; FEED PROCESSING
OSTI ID:
10111973
Research Organizations:
China Nuclear Information Centre, Beijing, BJ (China)
Country of Origin:
China
Language:
Chinese
Other Identifying Numbers:
Other: ON: DE92613306; TRN: CN9101692010556
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
18 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Daohong, Zhu. Study of extraction-spectrophotometric micro-determination of boron with methylene blue and its application. China: N. p., 1990. Web.
Daohong, Zhu. Study of extraction-spectrophotometric micro-determination of boron with methylene blue and its application. China.
Daohong, Zhu. 1990. "Study of extraction-spectrophotometric micro-determination of boron with methylene blue and its application." China.
@misc{etde_10111973,
title = {Study of extraction-spectrophotometric micro-determination of boron with methylene blue and its application}
author = {Daohong, Zhu}
abstractNote = {A sensitive extraction-spectrophotometric method for microdetermination of boron with methylene blue was investigated. The method was based on the extraction of a BF{sub 4}{sup -}-methylene blue complex into dichloroethane. Boron was determined directly by measuring the absorbance at 658 nm. The calibration graph was linear over the range of 2.5 x 10{sup -9} to 8 x 10{sup -8} g/mL. The blank, mechanism of the reactions, interference of other ions and some optimum conditions of the method were studied in detail. The main source of the blank resulted from methylene blue and the complex of F{sup -}-methylene blue. In order to reduce the blank, the amounts of methylene blue, H{sub 2}SO{sub 4} and HF were used as less as possible. Only one to one complex BF{sub 4}{sup -}-methylene blue was formed in the medium of H{sub 2}SO{sub 4}. About 90% of methylene blue and F{sup -}-methylene blue complex was removed with 5 ml of water and only a little amount of BF{sub 4}-methylene blue complex was decomposed. The extraction-spectrophotometric method with methylene blue was first applied to the microdetermination of boron in sodium metal and UF{sub 6}. The sample of sodium metal was taken and weighed in the glovebox filled with argon. Then sodium metal was oxidized, hydrolyzed, netralized and fluorizated with H{sub 2}O, H{sub 2}SO{sub 4} and HF, respectively. The 0.5 ppm of boron in sodium metal was determined with a relative error about {+-}4%. This method can be applied to the determination of boron in sodium metal, sodium sulfate and sodium hydroxide at different grades. The species of boron in the hydrolysate of UF{sub 6} is BF{sub 4}{sup -} anion, so the sample can be directly analyzed. Boron contents in the range of 0.1 to 0.5 ppm was determined with a relative error about {+-}3%. Six samples could be analysed in 2h.}
place = {China}
year = {1990}
month = {Aug}
}