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;; sales@analytika.netsales@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