Table 2.

Comparison of sodium dodecylbenzenesulfonate (SDBS) determination results from the biodegradation test samples obtained with the developed MBAS continuous flow method and the standard methylene blue active substances (MBAS) method

Test day	Standard MBAS method			MBAS continuous flow method
	Sample volume (mL)	Absorbance	Determined SDBS concentration (mg L−1)	Sample volume (mL)	Absorbance	Determined SDBS concentration (mg L−1)
1	100	2.5496	9.40	5	1.340	8.61
2	100	2.2990	8.48	5	1.206	7.70
3	100	2.0166	7.46	10	2.316	7.51
4	100	1.5305	5.69	15	2.912	6.32
5	100	1.2215	4.56	20	3.026	4.92
6	100	0.1741	0.75	30	1.240	1.31
7	100	0.0744	0.39	40	0.826	0.65
8	100	0.0476	0.29	50	0.840	0.53
10	100	0.0788	0.41	60	0.905	0.48
13	100	0.0471	0.29	70	1.018	0.46
16	100	0.0609	0.34	80	1.009	0.39
21	100	0.0384	0.26	100	0.853	0.27