The Use of 7,7′,8,8′-Tetracyanoquinodimethane for the Spectrophotometric Determination of Some Primary Amines Application to Real Water Samples

Table 5

Precision and accuracy data for primary amines determination obtained by the proposed method.

Compounds	Amount added (μg/mL)	Recovery* (%)	Average recovery (%)	RSD*
	0.5	104.0		2.903
Aniline	1.5	101.3	101.7	0.693
	2.5	100.0		3.689
	0.5	100.0		2.446
p-Aminophenol	1.0	97.5	99.5	0.539
	2.0	101		0.776
	0.15	100.0		1.509
Benzidine	0.5	100.0	99.1	4.383
	1.0	97.5		0.322
	0.125	100.0		5.625
Ethylamine	0.5	105.0	102.5	1.079
	1.0	102.5		0.619
	0.5	100.0		6.153
1,2-Diaminopropane	1.5	100.0	99.3	1.985
	2.5	98.0		0.308

∗Average of six determinations.