Microdetermination of Methenamine in the Presence of Formaldehyde by Solid Phase Spectrophotometry

Table 2

Comparison of sensitivity of some methods for the determination of methenamine.

Method	Molar absorptivity; (L·mol^−1·cm^−1)	Reference
Hantzsch esters formation	3.8×10^3	[9]
Complex of MT with iodine	2.0×10^4	[10]
FerroZine method	3.2×10^4	[11]
Proposed method (SPS)	2.3×10^5	This work