Application of Sephadex LH-20 for Microdetermination of Dopamine by Solid Phase Spectrophotometry

Table 2

Comparison of sensitivity of some spectrophotometric methods for the determination of dopamine.

Method	Molar absorptivity (L·mol^−1·cm^−1)	Reference
Reaction with 1,2-naphthoquinone-4-sulfonate	2.78 × 10^3	[14]
Diazotised with sulphamic acid	4.2 × 10^3	[16]
Isoniazid in the presence of 𝑁-bromosuccinimide	6.47 × 10^3	[15]
Thiosemicarbazide	2.4 × 10^4	[20]
Potassium ferricyanide-Fe(III)	3.2 × 10^4	[19]
Diazotised sulphanilamide in the presence of molybdate	5.39 × 10^4	[17]
Proposed method (solid phase spectrophotometry)	1.78 × 10^5	This work