ISS   Ref [33] Ref [34][C.S]
(PMA) (ARS)  (PTA)CMCPS
TpClPB- (PVC) (DBP)(2-NPPE)
Parameter o-NPOE DOP Plastic Coated-Ag Coated-graphite CLO-ST
Slope (mV/decade) 61.7 59.3 55.97 57.57 58.03 ± 0.150 60.0 ± 0.5
Correlation coefficient (r) 0.9874 0.9993 0.9998 0.9999 0.9999 0.9999
Linear range (M) -- -- 1 x10-7-1x 10-2 1 x10-7-1× 10-2
LOD (M)

1.0 × 10-5

5.01× 10-8 4.1×10-8 5.0×10-8 3.5 × 10-8
Working pH range

1.5 - 4.0

1.2-4.6

1.2-4.8
Response time (s)     20 25 15 ≤ 8
Life span/days 77 84 25 30 40 Fresh surface
Accuracy (%) -- -- 99.09 ± 0.6 99.72 ± 0.24 99.28 ± 0.857 99.87 ± 0.177
Standard deviation -- -- 0.460 0.227 0.150 0.326
Robustness     99.48 ± 0.537 99.36 ± 0.337 99.51 ± 0.445 99.79± 0.23
Ruggedness     99.51 ± 0.430 99.26 ± 0.650 98.77 ± 0.199 99.83± 0.26
r2: Correlation coefficient R%: Mean recovery% C.S: Current Study
Table 7 : Comparison between some of the published and the suggested methods for determination of CLO-ion.