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Section 6 Reagents and Calibration Standards
6.1 Reagents
BioTector TOC TN analyzer uses following reagents:
I. Acid: 1.8 N Sulfuric Acid (H
2
SO
4
) Reagent containing 40mg/l Manganese Sulfate Monohydrate
II. Base: 1.2 N Sodium Hydroxide (NaOH) Reagent
III. TN Cleaning: 0.5 N HCl and 0.042 M Sodium Oxalate (NaOx) mixture solution
IV. DI Water: Deionized Water (0.1 – 0.5 µS/cm)
BioTectors built with FMI Heavy Duty Circulation Pump require HCl Water, which is 0.04N Hydrochloric Acid
solution. If there is no HCl WATER IN/OUT ports on BioTector, HCl Water solution is not required. Reagents
should not contain high levels of organics, nitrates and phosphates. Ideally, the level of organics, nitrate and
phosphate should be less than 100 g/l (ppb) in the deionized water used to prepare TOC TN analyzer
reagents. Phosphoric acid or Nitric acid cannot be used as an alternative acid in BioTector TOC TN analyzer.
Acid, Base and HCl Water reagents are stable up to 1 year. TN Cleaning solution is stable up to 2 years.
Table 7 below summarizes the total days each BioTector TOC TN Analyzer reagents lasts at various system
configurations:
Table 7 BioTector TOC TN Analyzer Reagent Consumption
*Low Ranges are typically less than 500 mgC/l. Medium Ranges are between 500 and 2000 mgC/l. High Ranges are typically greater
than 2000 mgC/l.
+
The number of pulses acid and base reagents is injected every analysis cycle.
Above table is derived from several online operation parameters such as 100% online time. Note that TN
Cleaning, DI Water and HCl Water consumptions are independent of BioTector range. A 10 liters HCl Water
solution container typically lasts 38 days.
Recommended bunds (reagent spill trays) to contain above quantity reagents are 1x 50 Liters and 1x 25
Liters. If HCl Water solution is used, instead of the 25 Liters reagent spill tray, a 50 Liters tray is
recommended.
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