Carbon compounds combust in an oxygen-rich environment, resulting in complete conversion of carbon to carbon dioxide (CO2). TC is determined when the NDIR detector detects the resulting CO2 TIC is determined by measuring CO2 released following sample acidification. As the sample pH lowers, carbonate and bicarbonate ions convert to dissolved CO2, which is purged from solution and swept into an NDIR detector. The NDIR detector is calibrated to display the mass of CO2 detected. TOC is determined by performing separate TC and TIC analyses and subtracting the results.
TOC = TC - TIC
Standard
¡ò DIN38409H3
¡ò EN1484
¡ò EPA415.1,415.3
¡ò Standard Method 5310B (U.S.)
¡ò GB 13193-91
¡ò Water Quality Regulations for Drinking Water 138 (P.R.China)
Specification
Range
0.5ppm C–10,000 ppm
Precision
TC/TIC/TOC: 3% RSD
Analysis Time
TC/TIC/TOC: 4–8 min total
Particulates <400 μm
Method TC
680°C with platinum catalyst, 900¡æ with zirconium packing
TIC: acidification (H3PO4) and sparging
Furnace temperature: adjustable, 200¡æ–950¡æ in 1¡æ increments
Sample Introduction Fixed volume sample loops:
25μL, 50μL, 100μL, 200μL,400μL
DetectionNondispersive infrared cell
Oxygen Requirements <1 ppm CO2, CO, and THC at 50–60 psig (345–415 kPA)
Power Requirements
220(±22) V, 50(±1)Hz
Environmental Requirements Temperature
10¡æ–40¡æ
Relative humidity
<90% noncondensing
Dimensions
35 cm H x 28 cm W x 48 cm D
Weight
16 kg
Software
ETTOC(Chinese/English)
Communications
RS-232-C