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

Table 3

Determination of dopamine in dopamine injection solution using the developed procedure.

Sample	Proposed method; Found^a(mg/ampoule)	RSD; (%)	Labeled; (mg/ampoule)	Statistical test; t-test^b	Pharmaceutical Co./batch no.
1	199.6±1.8	0.90	200	0.44	Caspian Tamin-Iran/027
2	200.3±1.7	0.85	200	0.35
1	200.3±1.8	0.90	200	0.33	Caspian Tamin-Iran/029
2	200.4±1.6	0.79	200	0.50

aMean ± standard deviation (𝑛=4).
bTabulated t value for three degrees of freedom at P(0.95) is 3.18.