A Novel Kinetic Spectrophotometric Method for the Determination of Dopamine in Biological and Pharmaceutical Samples

Table 4

Determination of dopamine in human urine and serum samples by the developed procedure.

Sample	Proposed method^a (μg mL^−1)		RSD (%)	Recovery (%)
	Added	Found
Human urine
1	—	<D.L	—	—
	1.0	0.99±0.02	2.02	99. 00
	5.0	5.04±0.06	1.19	100.80
	30.0	30.64±0.33	1.08	102.13
2	—	<D.L	—	—
	1.0	1.02±0.02	1.12	102.00
	5.0	4.96±0.05	1.04	99.20
	30.0	29.71±0.30	1.00	99.03
Human serum
1	—	<D.L	—	—
	1.0	1.01±0.02	1.98	101.00
	5.0	4.97±0.06	1.21	99.40
	30.0	30.52±0.30	0.98	101.73
2	—	<D.L	—	—
	1.0	0.99±0.01	1.01	99.00
	5.0	5.03±0.06	1.19	100.60
	30.0	29.88±0.34	1.13	100.40

aMean ± standard deviation (𝑛=4).