Simultaneous microdetermination of nitrates and nitrites by differential gasometric reactions

✍ Scribed by S.S.M. Hassan

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 196 KB
• Volume: 58
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(72)80032-1

✦ Synopsis

TABLE III PRECISION OF TITRAT1ONS AT 2 5 ° A N D 6 0 ° (Results are given as ml of 0.1 N KMnO~. 5 titrations were done) 25 ° 60 ° Mean (m) 44.352 44.35 o Standard deviation (s) 0.011 0.012 s/m" 1000 0.24 p. p. thousand 0.2 6 p. p. thousand SHORT COMMUNICATIONS

The blank correction amounts to about 0.02 ml of 0.1 N potassium permanganate solution.

Conclusions

The titration of a solution of oxalate containing perchloric acid and manganese(II) sulfate is feasible in the cold or with previous warming of the solution. In the titration of hot solutions the temperature is not critical ; previous warming of the solution to 60-70 ° is recommended. The precision of the procedure is excellent.