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Caution: Always pour the
concentrated acid into the water;
never pour water into the acid.
Take the same precautions you
would normally take when
handling any corrosive material.
See Safety Note 7 on page 185
Spanish, French, German, or
Italian translations.
1010/
UV 4195- / 6195-
3010
TOC Range mg/L
Sodium Persulfate
Molarity
g per 20 L
950
Usage days per 20 L
Phosphoric Acid
TIC mg/L C (Na
CO
)
10
2
3
Molarity
0.1
mL (85% H
PO
) per
3
4
137
20 L
Usage days per 20 L
2010/
UV 4195-
4010
TOC Range mg/L
200
Sodium Persulfate
Molarity
1.4
g per 20 L
6660
Usage days per 20 L
30
Phosphoric Acid
TIC mg/L C (Na
CO
)
10
2
3
Molarity
0.1
mL (85% H
PO
) per
3
4
137
20 L
Usage days per 20 L
30
UVTOCReagents and Standards.fm
The ideal sample pH after addition of acid is 3.0 or less, for efficient removal
of inorganic carbon. In some cases, stronger solutions and/or higher pumping
rates may be required to adequately maintain the pH of the sample in the TIC
scrubber. Determine the necessary acid reagent concentration by adding
phosphoric acid to a sample until the pH is reduced to 3.0 or less. To verify the
pH is 3.0 or less, collect a sample from the drain line.
Table 7
details the concentration of acid required to remove 10 mg/L and 100
mg/L C as TIC for each analyzer. Select the appropriate molarity to remove
for
the anticipated TIC in your sample.
Table 7 Reagent Tables
1020/
1030/
3020
3030
5
10
25
0.2
0.4
0.6
1900
2860
90
90
90
100
10
100
10
0.6
0.1
0.6
0.1
819
137
819
137
30
30
30
2020/
2030/
4020
4030
500
1000
1.6
0.9
7620
4280
30
30
100
10
100
10
100
0.6
0.04
0.3
0.04
819
55
410
55
410
30
30
1040/
1050/
3040
1050
50
100
0.6
0.4
2860
1900
90
90
100
10
100
10
100
0.6
0.05
0.3
0.02
819
68
410
27
137
30
30
2040/
2050/
4040
4050
1000
2000
0.9
1.5
4280
7140
30
30
10
100
10
100
0.3
0.04
0.1
0.02
0.1
55
137
27
137
30
30
Section 3
1060/
1070/
3060
3070
200
500
0.5
0.6
2380
2860
90
90
10
100
10
100
0.1
0.02
0.1
0.02
0.1
27
137
27
137
30
30
2060/
2070/
4060
4070
5000
10000
1.2
0.9
5710
4280
30
30
10
100
10
100
0.02
0.1
0.02
0.1
27
137
27
137
30
30
Preparing Phosphoric Acid Solution
2000/
4000
100
0.7
3330
30
10
100
0.1
0.6
137
819
30
2080/
4080
20000
1.2
5710
30
10
100
0.02
0.1
27
137
30
Page 51
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