A Reversible Spectrophotometric Method Based on a Coupled Microfluidic Chip for Highly Selective Ammonium Detection

Table 1

Detection concentrations (mg L⁻¹) for the 4 samples by the two methods.

Sample	1	2	3	4
CC method	2.7 ± 0.3	18.7 ± 0.4	23.2 ± 0.2	29.8 ± 0.1
Berthelot method	2.9 ± 0.2	18.4 ± 0.2	22.6 ± 0.3	30.3 ± 0.2
Error	7%	2%	3%	2%