Novel Reagents for the Spectrophotometric Determination of Isoniazid

Table 2

(a) Evaluation of accuracy and precision (using ECH as reagent). (b) Evaluation of accuracy and precision (using HPC as reagent).

(a)

Amount taken (μg mL^−1)	Amount found* (μg mL^−1)	RE (%)	SD (μg mL^−1)	RSD (%)
2.00	1.98	1.00	0.015	0.79
4.00	3.97	0.75	0.0207	0.52
6.00	5.96	0.66	0.0239	0.4
8.00	7.97	0.37	0.0259	0.32
10.00	9.96	0.4	0.0270	0.27
12.00	11.95	0.41	0.0404	0.33

* Mean of five determinations.

(b)

Amount taken (μg mL^−1)	Amount found* (μg mL^−1)	RE (%)	SD (μg mL^−1)	RSD (%)
20.00	19.99	0.05	0.09	0.45
40.00	40.03	−0.08	0.06	0.14
60.00	59.96	0.06	0.12	0.20
80.00	79.93	0.08	0.08	0.10

* Mean of five determinations.
RE: relative error; SD: standard deviation; RSD: relative standard deviation.