Methylamine-Sensitive Amperometric Biosensor Based on (His)₆-Tagged Hansenula polymorpha Methylamine Oxidase Immobilized on the Gold Nanoparticles

Table 2

MA content in frozen sea fish determined by different methods.

Samples	Methods				Difference, %
	MA-selective biosensor		Chemical method, μ М
	μ М (in extract)	μg/g (in wet meat)	μ М (in extract)	μg/g (in wet meat)
Hake	14.0 ± 0.5	2.4 ± 0.1	13.7 ± 1.2	2.3 ± 0.1	2.1
Grouper	15.4 ± 0.2	2.6 ± 0.1	15.8 ± 0.3	2.7 ± 0.2	2.5