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

◎ DIN38409H3
◎ EN1484
◎ EPA415.1,415.3
◎ Standard Method 5310B (U.S.)
◎ GB 13193-91
◎ Water Quality Regulations for Drinking Water 138 (P.R.China)

Specification

Range
100 ppb C–10,000 ppm C
Precision
TC/TIC/TOC: 2% RSD
Analysis Time
TC/TIC/TOC: 4–8 min total
Particulates <400 μm
Method TC
680°C with platinum catalyst, 900℃ with zirconium packing
TIC: acidification (H₃PO₄) and sparging
Furnace temperature: adjustable, 200℃–950℃ in 1℃ 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℃–40℃
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