๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Direct titration of vanadium(IV) with EDTA using N-benzoyl-N-phenylhydroxylamine as metal indicator

โœ Scribed by V.R.M. Kaimal; S.C. Shome

Publisher
Elsevier Science
Year
1962
Tongue
English
Weight
244 KB
Volume
27
Category
Article
ISSN
0003-2670

No coin nor oath required. For personal study only.

โœฆ Synopsis

SHOriT_ COMtiUNlGATlONS in benzenei2. From the aqueous phase, nickel is extracted as usual aMer,.evaporation of the acid and adjustment to PH 6.0.

Recommended

@ocedure. To an aqueous solution containing 180-1600 pg of nickel in a separatory funnel, add IO ml of buffer solution of pH 5.5-8.0 and extract as described under "General procedure".

From ten runs as above with 524 rug of nickel, the absorbance measured was,.. 0.155 -& 0.002 ; the standard deviation was f. I.oO/~ and the accuracy within & x.50/;'.*'.' The proposed method is simple and rapid (requiring 15 to 20 min per run) and at the same time shows good reproducibility and accuracy. The sensitivity is 0.14 pg of nickel per ml (Sandell's definition).

๐Ÿ“œ SIMILAR VOLUMES

Direct compleximetric titration of indiu
Direct compleximetric titration of indium, thallium and thorium with EDTA using iron-N-benzoyl-N-phenylhydroxylamine as indicator
โœ H.R. Das; S.C. Shome ๐Ÿ“‚ Article ๐Ÿ“… 1968 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 245 KB

P~ecisiorr. An estimate of the precision of this method was ascertained from the results of II samples, each containing 2.17 p.p.m. of vanadium. These samples gave a mean absorbance value of 0.468 at 323 nm. The standard deviation was 0.003 absorbance unit, or a relative standard deviation of 0.64(%