Process and apparatus for the voltammetric measurement of the quantity or mass of separated sample components

Apparatus for voltametric measurement of sample component quantities in a liquid comprising:

• a voltametric measuring cell containing a measurement electrode;
• delivery means for conveying said liquid, as a pulsating jet of liquid flow, into contact with the surface of said electrode whereby a current is generated which changes as a function of the flow rate of said jet of liquid;
• means for adjusting the cross section of said jet of liquid so that said cross section is greater than the measurement surface of the electrode in the region of the electrode surface;
• means for maintaining the path of said liquid jet substantially perpendicular to the planar surface of the electrode;
• time delay means electrically connected to said delivery means;
• current sampler means electrically connected to said time delay means and said voltametric cell;
• said current sampler means being adapted to sample the produced voltametric current signal only during that time period from when the jet of liquid flow has attained at least 50% of its maximum velocity, as it increases toward said maximum velocity, and, after attaining said maximum velocity, until it decreases to 50% of said maximum velocity;
• and P1 means for integrating the sampled signal and determining the material quantities from the integrated data.