Model CM350 -Total Sulfur Analyzer / Total Sulfite Analyzer
The CM350 Total Sulfur / Total Sulfite Analyzer is a complete analytical system capable of measuring total sulfur and total sulfites in solid and liquid samples. Combining a dual zone, high-temperature furnace, a self-contained acidification module and a highly sensitive SO2/H2S detector, the CM350 offers the flexibility to analyze most any sample type and concentration with a precision un-matched by other analytical techniques.
The CM350 system includes the following 3 components pictured above:
CM5017S SO2 Analyzer
- No user calibration
- Wide, linear dynamic range
- Readability to 0.01 µg Sulfur
- User selectable display units
- Floppy disk drive for archiving data
CM5380 Dual Zone Furnace with CM5382 Sample Introduction Kit
- Programmable up to 1100OC
- Separate catalyst zone
- Automated oxygen dosing
- Split-tube furnace design for easy maintenance
- 10, 25, 50 or 100 ml reaction vessels
- Selectable volume acid dispenser
- Internal air pump with flow controller
- Controlled sample heating and stirring
A major advantage of the CM350 Total Sulfur / Total Sulfites Analyzer is the use of coulometric detection. Employing the principles of Faraday’s Law, the CM5017S SO2/H2S Analyzer automatically measures the absolute mass amount of sulfur dioxide and/or hydrogen sulfide evolved from a combusted sample. No user-calibration is required and linear detection is available from less than 1 µg sulfur to over 10,000 µg sulfur. Using this 100% efficient coulometric process, relative standard deviations of 0.2% or better are common for standard reference materials. For smaller concentrations, an absolute deviation of approximately 1 µg S is typical.
Sample sizes can range from 0.5mg to 10 grams with concentrations from 1ppm to 100%. Analysis times of 5-7 minutes are typical
Upon introducing a sample into the sample flask, the system is purged with a SO2/H2S –free carrier gas to eliminate atmospheric sulfur dioxide and hydrogen sulfide. At that point, the analysis is initiated by adding an aliquot of acid through the acid dispenser into the sample flask, causing sulfites to be evolved as SO2 or releasing dissolved sulfur dioxide and/or hydrogen sulfide. Using the built-in heater and magnetic stirrer to facilitate the fast evolution of sulfites, the carrier gas transports the reaction products into the reaction cell within the CM5017S Analyzer. There, the resulting sulfur dioxide and/or hydrogen sulfide is automatically measured using absolute coulometric titration.