Abstract
Nickel is quantitatively retained on 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP)–ammonium tetraphenylborate with microcrystalline naphthalene or by a column method in the pH range 9.0–10.5 from a large volume of aqueous solutions of various samples. After filtration, the solid mass consisting of the nickel complex and naphthalene was dissolved with 5 ml of dimethylformamide and the metal was determined by atomic absorption spectrometry. The nickel complex can alternatively be quantitatively adsorbed on ammonium tetraphenylborate–naphthalene adsorbent packed in a column and determined similarly. The calibration curve is linear at 0.30–18 ppm in dimethylformamide solution. Eight replicate determinations of 5.0 ppm of nickel gave a mean absorbance of 0.096 with a relative standard deviation of 1.5%. The sensitivity for 1% absorption was 0.23 µg ml–1. The interference of a large number of anions and cations has been studied and the optimized conditions developed were utilized for the trace determination of nickel in various standard samples.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.