A straightforward method for both the quantitative and the equilibrium analysis of humic acids in solution, based on the combination of potentiometry with coulometry, is presented. The method is based on potentiometric titrations of alkaline solutions containing, besides the humic acid sample, also NaClO4 1M; by means of constant current coulometry the analytical acidity in the solutions is increased with a high precision, until the formation of a solid phase occurs. Hence, the total acid content of the macromolecules may be determined from the e.m.f. data by using modified Gran plots or least-squares sum minimization programs as well. It is proposed to use the pKw value in the ionic medium as a check of the correctness of each experim...
The acidity determinations method of humic acids (HA) content was developed by Schnitzer and Gupta a...
A modefied Gran titration procedure for the determination of strong and weak acids in freshwater is ...
The potentiometric determination method of bases(or acids)in water-organic solvent mixture, combinin...
A straightforward method for both the quantitative and the equilibrium analysis of humic acids in so...
A straightforward method for both the quantitative and the equilibrium analysis of humic acids in so...
The flowing of constant direct current allows planning a coulometric method to determine solubility ...
A nonlinear method for ®tting acid±base potentiometric titration data was applied to commercial and ...
407-412A new approach has been made to simultaneously elucidate percentage compositions and ionisati...
A pontentiometric study of the acid-base properties of humic acid was made with the objective of det...
This work concerns with the study of acidobasic behavior of solutions of sodium salts of carboxymeth...
The variability of experimental procedures referred to in the literature for the potentiometric acid...
With the advent of high-precision automatic titrators operating in pH stat mode, measuring the mass ...
Several works in the literature show that it is possible to establish the analytic equations to esti...
A linear sweep voltammetric (LSV) method for the simultaneous determination of free hydrogen ions an...
The anionic charge of humic substances (HS) plays a major role in the interaction of HS with other c...
The acidity determinations method of humic acids (HA) content was developed by Schnitzer and Gupta a...
A modefied Gran titration procedure for the determination of strong and weak acids in freshwater is ...
The potentiometric determination method of bases(or acids)in water-organic solvent mixture, combinin...
A straightforward method for both the quantitative and the equilibrium analysis of humic acids in so...
A straightforward method for both the quantitative and the equilibrium analysis of humic acids in so...
The flowing of constant direct current allows planning a coulometric method to determine solubility ...
A nonlinear method for ®tting acid±base potentiometric titration data was applied to commercial and ...
407-412A new approach has been made to simultaneously elucidate percentage compositions and ionisati...
A pontentiometric study of the acid-base properties of humic acid was made with the objective of det...
This work concerns with the study of acidobasic behavior of solutions of sodium salts of carboxymeth...
The variability of experimental procedures referred to in the literature for the potentiometric acid...
With the advent of high-precision automatic titrators operating in pH stat mode, measuring the mass ...
Several works in the literature show that it is possible to establish the analytic equations to esti...
A linear sweep voltammetric (LSV) method for the simultaneous determination of free hydrogen ions an...
The anionic charge of humic substances (HS) plays a major role in the interaction of HS with other c...
The acidity determinations method of humic acids (HA) content was developed by Schnitzer and Gupta a...
A modefied Gran titration procedure for the determination of strong and weak acids in freshwater is ...
The potentiometric determination method of bases(or acids)in water-organic solvent mixture, combinin...