Research Article

An Amperometric Biosensor Based on Alanine Dehydrogenase for the Determination of Low Level of Ammonium Ion in Water

Table 1

Thicknesses of pHEMA membrane containing 0.6 units of AlaDH enzyme determined using digital vernier caliper ( ).

Total volume of AlaDH and monomer HEMA mixture in volume ratio of 1 : 1 (μL)Thickness of AlaDH-containing pHEMA membrane (mm)

0.5
1.0
2.0
3.0
4.0
5.0
6.0