Specifications include, but are not limited to: 1. Oxidation Method: To be able to ensure complete oxidation of refractory compounds, the analyzer must use catalytic combustion method, with a catalyst temperature to be optimized at 680C for carbon and 720C when analyzing carbon and nitrogen. 2. Accepted Methods: Must meet " Standard Methods for the Examination of Water and Wastewater 53108 ", EPA 415.1, EPA 415.3, EPA 90604, and USP <643>. 3. Detection Limit: Must be 4 ppb or better. Measuring range from 50 ppb to 30,000 ppm TC and 3,000 ppm IC 4. Particulate Handling: To ensure complete oxidation of organics when particulates are present, instrument must be able to handle particles as large as 0.5 mm as standard, and as large as 0.8 mm with an optional accessory. 5. Calibration: To enhance "walk-away" automation, and to ensure reliable results, instrument must be able to select the best of three pre-chosen calibration curves for each sample. This must be done automatically and without operator intervention. Instrument must also be able to provide automatic multiple calibration points (at least 10) from a single standard with a fixed volume injection. Calibration ranges must be continuous and not fixed so as to ensure the optimal measuring range. 6. System Blank: To ensure accuracy of results, system must generate its own blank water to provide a true system blank, not simply a matrix blank with a calibration curve shifted through the zero point. 7. NDIR Detector: To minimize drift due to ambient temperature changes, and to provide more reproducible results, NDIR detector must be thermally stabilized (i.e. 65 "C) and utilize micro flow sensor technology. NDIR detector must have a linearity of at least 5 orders of magnitude. Multi-channel detectors are not acceptable. NDIR must be a continuous flow through type detector as high pressure stop flow detectors have higher maintenance due to seal replacement and have higher probability of leaks causing inaccurate results. High pressure systems also can be a safety hazard. 8. Sparging: For non-purgeable organic carbon (NPOC) or acidify and sparge TOC system must be capable of automatic pretreatment in the TOC analyzer. 9. Air Purification: To eliminate high-purity air tanks or a separate instrument for air purification, an optional on-board air purifier must be available. 10. Auto-Dilution: To reduce the need for operator manipulation of samples, instrument must provide for automatic dilution of over-range samples at ANY concentration. Dilution capability must be from a minimum of 2 times to at least 50 times. 11. Electronic Dehumidifier: System must incorporate an electronic controlled dehumidifier held at 1C for maximum water vapor removal. Room temperature gas/liquid separates and drying tubes are not acceptable because there is no method for automatic monitoring and systems require higher maintenance. 12. Injection Volume: The sample injection volume must be between 10-2000 uL with a single sy'inge. 13. Injection Method: Sample injection should be by a maintenance free slider type mechanism. Septum method injections are not acceptable. 14. Gas Control: System will utilize electronic mass flow controllers to control gas flow rates and monitor incoming pressure. 15. Precision: The TOC analyzer must have precision of 1.5% or better 16. Accuracv: The TOC analyzer must have accuracy of 1.50% or better. 17. Analysis Time: The TOC must have analysis time of no more than 3-4 minutes per injection. 18. Standalone Models: Requires no computer interface for operation. All operation is from the keyboard on the instrument. Standalone models should ensue that no computer programs, files or viruses can be added to the system to ensue data integrity. Should the user decide the standalone version can be switch to a PC version since software is included. Also if the PC were to be corrupted the user can switch back to a standalone thus eliminating any down time because of computer problems. 19. Standalone Operation: The system must have a color LCD. Operation must be by push button. Touch screen are not acceptable as they can be easily damaged by sharp objects. Communications must be by USB for printer, memory, and software if user wants to use a PC and monitor. 20. Software Kit: Stand-alone version must be easily capable of conversion to PC control with software kit as standard. 2l . Software: Available software must support Windows 7 and XP and must provide the following minimum capabilities: a) Control chart for tracking of QC checks and sample trends; easy transfer to 3'o pu.ty software. b) Reports must be easily customizable by user without transfer to 3'd party software. c) Automatic "sleep" mode after analysis to save operator costs by reducing or stopping carrier gas flow. d) Automatic maintenance log to notify users when preventative maintenance is due. e) Automatic spike and o% recovery calculation, with user-specified failure action (repeat, stop, continue, etc.) f) Operate multiple TOC units on one PC. g) Software must permit setting the number of significant digits displayed. h) Software must include calibration correlation coefficient verification where users can specify acceptable correlation values of 0.0000 to 1.0000. i) Software must include a Schedule File save function for frequently used analysis pattens. j) Internal "Test Program" file verifies no program files are corrupted by viruses. k) Software must have feature permitting access rights for administrator, main user, user, and guest.
