Table 1 Toluene measurement from groundwater and river water by using the GC–MS method and biosensors

T7-biosensor

0.16 (6.7%)^b

0.61 (8.9%)

1.31 (9.1%)

8.6 (−9.5%)

4.8 (−14.3%)

15.2 (−2.6%)

0.078 (−4.9%)

0.13 (8.3%)

18.5 (−10.2%)

30.6 (−2.9%)

T3-biosensor

ND^c

0.50 (−10.7%)

1.52 (26.7%)

10.1 (6.3%)

6.1 (8.9%)

16.5 (5.8%)

ND-

ND-

21.8 (5.8%)

32.6 (3.5%)

SP6-biosensor

ND-

0.54 (−3.6%)

1.25 (4.2%)

9.8 (3.2%)

5.8 (3.6%)

15.9 (1.9%)

ND-

ND-

20.9 (1.5%)

32.1 (1.9%)