Direct determination of boscalid in grape samples by differential pulse voltammetry using a carbon paste electrode.

A new methodology to determine directly the fungicide boscalid (BSC) was developed and successfully applied in red grape 100% juice, peel extracts, pulp and purple grape seeds ( L.) with a working carbon paste electrode (CPE) without sample preparation. Cyclic voltammetry (CV) indicated the presence of an irreversible cathodic process of BSC at -1.

Evaluation of a high sensitivity PbO(2) pH-sensor.

In this paper, a new high sensitivity potentiometric pH-electrode with a response in the acid region is proposed. It consists of a PbO(2)-paraffin matrix deposited on graphite. Its simple construction and studies of some variables at 0.