SPECTROPHOTOMETRIC DETERMINATION OF CHROMIUM (VI) WITH SODIUM 2- BROMO-4,5-DIHYDROXYAZOBENZENE-4´-SULFONATE
スポンサーリンク
概要
- 論文の詳細を見る
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
- Dynamic Forest : An Efficient Index Structure for NAND Flash Memory
- 国内ニュース:三宅島VOR/DME局舎無線施設の運用再開について
- 前衛音楽の美学的論拠 (日本音楽学会第42回全国大会総覧--1991年10月19日〜20日)
- Viscoelasticity of Potassium Neutralized Telechelic Poly(ethylene-butylene) Ionomer in Non-polar Solvent. II
- 植物組織培養における計測と制御 (植物バイオエンジニアリング) -- (事例解説)