Primary methods - Analytika
Transcript of Primary methods - Analytika
Primary methodsPrimary methodsPrimary methodsPrimary methodsDetermination of the analyte
mass concentrationin single element water calibration solutions
Martin Vlasák, Zuzana Luxemburková, Václav Sychra
www.analytika.netwww.analytika.net;; [email protected]@analytika.net
Analytika® spol. s r.o., Ke Klíčovu 2a/816, 190 00 Praha 9
Gravimetric preparation of water calibration solutionsand analyte mass concentration determination
Sodium calibration solution in 2% (v/v) nitric acid(Kragten spreadsheet)
Antimony calibration solution in 1%HF+5%HNO3 (v/v)
Bismut standard solution in 2% (v/v) nitric acid
Chelatometric (complexometric) determinations
Chelatometric (complexometric) determinationsHuge amount of single element calibration solutions
Other titrimetric determinationsAlkalimetry, argentometry, manganometry, bromatometry
Alkali metals calibration solutionsDetermination in the form of alkali metal sulfates
Gold in 5% (v/v) hydrochloric acid solutionDetermination using hydroquinone reduction
Baryum in 2% (v/v) nitric acid solutionDetermination in the form of baryum chromate
Niobium in 1% (v/v) HF and 5% HNO3 (v/v) solutionDetermination using cupferron as precipitating agent
Ni in 2% (v/v) HNO3 and Pd in 5% (v/v) HCl solutionDetermination using dimethylglyoxime as precipitant
Ni2++
N
N
OH
OH
2OH
-
N
N
Ni2+
N
N
O O
O O
H
H
+ 2H+
Nitrate, perrhenate and wolframate in water solutionDetermination using nitrone as precipitating agent
Ta and Ti in 1% (v/v) HF and 5% HNO3 (v/v) solutionDetermination using ammonia solution hydrolysis
Standard calibration solutions analysed
Conclusion
� primary methods (gravimetry and titrimetry)
are capable for the determination of a nominal
value of the analyte mass concentration with
acceptable uncertainty below 0,2% (rel.)
� metrological compatibility between analyte
mass concentration value found and certified
was for more than 60 solutions fulfilled
Literature
Acknowledgement