Spectrophotometric Determination of p-Nitrophenol under ENP Interference

Table 4

The results of accuracy and precision.

Serial no.	Preparation sample (mg/L)	Times	Mean (mg/L)	Accuracy (%)	SD^1	RSD^2 (%)
1	2	12	2.06	2.93	0.11	5.31
2	4	12	3.94	‒1.39	0.20	5.17
3	6	12	6.05	0.85	0.22	3.61
4	8	12	8.13	1.59	0.17	2.11
5	10	12	9.92	‒0.76	0.15	1.48
6	12	12	11.94	‒0.47	0.09	0.75
7	14	12	14.02	0.12	0.12	0.87
8	16	12	15.79	‒1.30	0.13	0.80
8	20	12	20.23	1.15	0.49	2.44
10	30	12	30.09	0.30	0.35	1.15
11	40	12	40.14	0.34	0.42	1.06
12	50	12	50.70	1.40	0.48	0.94

¹SD: standard deviation; ²RSD: relative standard deviation.