SPECTROPHOTOMETRIC DETERMINATION OF CHROMIUM (VI) WITH SODIUM 2- BROMO-4,5-DIHYDROXYAZOBENZENE-4´-SULFONATE
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概要
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A new spectrophotometric method for the determination of chromium(VI) has been investigated. Chromium(VI) reacts with sodium 2-bromo-4,5-dihydroxyazobenzene-4´ -sulfonate to form a water-soluble complex, in which the metal may exist in the trivalent state. The reddish violet complex with its absorption maximum at 543 nm is quantitatvely formed in 0.24-0.72 M per-chloric acid solution. A linear calibration curve was obtained over the concentration range 0-16 μg of chromium(VI) in 25 ml. The apparent molar absorptivity is 4.64×10^4 cm^<-1> mol^<-1> 1 at 543 nm. The interference from metal ions such as iron (III), aluminum(III) and zirconium(IV) could be eliminated by the addition of ammonium fluoride. The method has been applied to the determination of chromium in standard steel samples.
- 1983-05-05
論文 | ランダム
- 波浪による二枚貝の岸沖移動に関する解析手法の開発
- Oビル計画 (医病院建築) -- (Oビル計画〔設計・後藤真理子+現代設計〕)
- T病院・設計メモ (医病院建築) -- (東名厚木病院〔設計・長尾重武・後藤真理子+現代設計〕)
- エンボス (ステンレス鋼の現状-2-建築への適用) -- (材料製造)
- ステンレスの一般住宅への適用 (ステンレス鋼の現状-2-建築への適用) -- (建材)