Table 3: Evaluation of intraday precision and accuracy of PZT using the proposed methods.

MethodTaken ( g mL−1)Recoverya (%)Precision, RSDb (%)Accuracy, Erb (%)Confidence limitc

1.099.650.93
A1.5100.071.14
2.099.801.06
2.599.960.76

1.0100.101.32
B2.0100.021.15
3.099.901.19
4.0100.01.26

2.099.501.39
C4.0100.050.91
6.099.600.87
7.099.400.77

1.0100.100.98
D2.0100.031.07
3.099.851.12
3.599.901.53

1.099.750.85
E1.599.900.94
2.0100.051.05
3.0100.151.21

Mean of five determination.
bRSD%: percentage relative standard deviation; Er: percentage relative error.
cConfidence limit at 95% confidence level and four degree of freedom ( ).