Ref. 9
Ref. 10
Ref. 11
Sensor 1
Nf-ST
Sensor 2
Nf-SM
Sensor 3
Nf (ST+SM)
Parameter
NFT-dipicrylamine
NFL-CD/PVC-COOH
NFT-sulfocalix-8-arene
3.0% (I.P)
+55.0% G+42.0% P
3.0% (I.P)
+55.0% G+42.0% P
2.5% (ST) (I.P)+
0.5 % (SM) (I.P)+55.0% G+42.0% P
Slope (mV/decade)
-54-56
-50.5
-54.1
-59.0 ± 0.5
-58.5 ± 0.5
-60.5 ± 0.5
Correlation coefficient (r)
---
0.9974
0.9993
0.996
0.999
0.998
Linear range (M)
10
-5
-10
-2
10
-5
-10
-3
1x10
-5
-1x10
-2
2.50x10
-8
-1.00x10
-3
5.00x10
-8
-1.00x10
-3
1.25x10
-8
-5.00x10
-2
LOD (M)
---
----
5.6x 10
-6
1.25x10
-8
4.00x10
-8
1.00x10
-8
Working pH range
2-5
2.50 –4.50
2 ‐ 5
2.0–6.0
2.0–6.0
2.0–6.0
Response time (s)
---
20-30
9
≤ 5 s
≤ 5 s
≤ 5 s
Life span/days
---
6-8 w
14 d
Fresh surface
Accuracy (%)
---
100.13 ± 1.61
99.97 ± 0.89
99.12 ± 0.5
98.55 ± 0.5
99.25 ± 0.5
Standard deviation
≤ 2.0%
1.612
less than 2.0%
Robustness
---
---
---
99.65 ± 0.5
99.37 ± 0.5
99.87 ± 0.5
Ruggedness
---
---
---
99.75 ± 0.5
99.45 ± 0.5
99.75 ± 0.5
r
2
: Correlation coefficient R%: Mean recovery% C.S: Current Study
Table 9:
Comparison between the published and the current methods for determination of Nf-ISS.
