Development and Validation of a Complexometric and Potentiometric Titration Method for the Quantitative Determination of Zinc Pyrithione in Shampoo

Table 2

Precision and accuracy (n = 6) of the method for potentiometric and complexometric titration.

Parameter		Complexometric titration	Potentiometric titration
Intermediate precision RSD%		0.84	0.40
Reproducibility RSD%		0.75	0.31
	0.20%	0.02	0.25
System repeatability RSD%	0.80%	0.03	0.18
	1.40%	0.15	0.10
Method repeatability RSD%	S1	0.47	0.30
	S2	0.70	0.23
	S3	0.69	0.36
Accuracy % recovery		99.89	99.96
Accuracy RSD %		1.06	0.98