- 作者: Anand Kamavisdar*, Shitikanth R. Khanwalkar and Rajmani Patel
- 作者服務機構: Central Fuel Research Institute, 17/C, Telangkhedi Area, Civil Lines, Nagpur 440 001 MS, India
- 中文摘要: A new reagent system has been reported for the extractive separation and simultaneous spectrophotometric determination of vanadium (V). The method is based on the formation of a water insoluble blue-violet V(V) complex with N-hydroxy-N-m-tolyl-N¢-phenylbenzamidine (HTPBA), and neutral surfactant Triton X-100 into chloroform over an acidity range of 1.0-10.0 M acetic acid. The complex shows a broad absorption maximum at 570 nm, when measured against a chloroform blank. The lmax (570 nm) of the complex and that of reagent (313 nm) are well separated, hence the excess of the reagent does not interfere in the spectrophotometric determination of the metal. The molar absorptivity (e) of the complex is (4.74) ’ 103 l mol-1 cm-1. The linearity of the calibration curve is followed between 0.5-12.0 mg mL-1 with slope, intercept and correlation coefficient of 9.16 ’ 10-2, 4.5 ’ 10-3 and 0.999, respectively. The detection limit of the method is 45 mg l-1. The proposed reagent system provides significantly higher tolerance limit for iron (500 mg mL-1) and also various metal ions commonly associated with vanadium did not interfere. The method was applied for the determination of vanadium content of three samples I.e. Spirogyra, Puccinia and Riccia.
- 英文摘要: --
- 中文關鍵字: Extractive; Spectrophotometry; Vanadium; HTPBA; Fungi.
- 英文關鍵字: Extractive; Spectrophotometry; Vanadium; HTPBA; Fungi.