Thermo Scientific REDOX/ORP 9678BNWP, User Manual

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Redox/ORP Electrode User Guide
Suitable Titrants Titration Reaction Ref
potassium permanganate
(KMnO
4
)
5Sb +3 + 2MnO
4
¯ + 16H + –›
5Sb +3 + 2Mn +2 + 8H
2
O
2
sodium bromate (NaBrO
3
) BrO
3
¯ + 3As +3 + 6H + –›
Br¯ + 3As +5 + 3H
2
O
3
potassium permanganate
(KMnO
4
)
5H
2
O
2
+ 2MnO
4
¯ + 6H + –›
5O
2
+ 2Mn +2 + 8H
2
O
5
sodium iodide (NaI) in acid solution Cl
2
+2I¯ –› I
2
+
2Cl¯, In basic solution
2ClO¯ + 2I¯ –› I
2
+ 2Cl¯ + 2OH¯
1
sodium iodate ( NaIO
3
) 2I
2
+ IO
3
¯ + 5HCN + H + –›
5ICN + 3H
2
O
4
sodium thiosulfate
(Na
2
S
2
O
3
)
I
2
+ 2S
2
O
3
-2 –› 2I¯ + S
4
O
6
-2 3
ceric sulfate [Ce(SO
4
)
2
]
(not recommended for
samples containing Cl¯)
Fe +2 + Ce +4 –› Ce +3 + Fe +3 2
potassium dichromate
(K
2
Cr
3
O
7
), recommended
for samples containing Cl¯
Cr
2
O
7
-2 + 6Fe +2 + 14H + –›
2Cr +3 + 6Fe +3 + 7H
2
O
3
ferrous sulfate (FeSO
4
) MnO
4
¯ + 5Fe +2 + 8H + –›
Mn +2 + 5Fe +3 + 4H 2 O
2
potassium permanganate
(KMnO
4
)
3Mn +2 + 2MnO
4
¯ + 7H
2
O –›
5MnO
3
+ H
2
O + 4H +
1
ceric sulfate [Ce(SO
4
)
2
] Sn +2 + 2Ce +4 –› Sn +4 + 2Ce +3 4
iodine (I
2
) SO
2
+ I
2
+ 2H
2
O –›
SO
4
-2
+ 2I
¯
+ 4H
+
1
sodium bromate (NaBrO
3
) BrO
3
¯ + 3Ti + 6H + –›
Br¯ + Ti +3 + 3H
2
O
3
Iodine (I
2
) I
2
+ 2S
2
O
3
-2 –› 2I¯ + S
4
O
6
3
potassium dichromate
(K
2
Cr
2
O
7
)
3UO +2 + Cr
2
O
7
-2 + 8H + –›
3UO
2
+2 + 2Cr +3 + 4H
2
O
3
sodium iodate (NaIO
3
) ZnHg(SCN)
4
+ 6IO
3
¯ + 6Cl¯ +
8H + –› Zn +2 + Hg +2 + 6ICl +
4HCN + 4SO
4
-2
2