Help with Total Organic Carbon (TOC) Analyzers specifications:
Analysis Method
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| Analysis Method: | |||
| Your choices are... | |||
| Combustion | Analysis is determined when carbon compounds are combusted in an oxygen-rich environment, resulting in the complete conversion of carbon to carbon dioxide. | ||
| UV Persulfate Oxidation | The carbon dioxide is purged from the sample and then detected by a detector calibrated to directly display the mass of carbon dioxide measured. This mass is proportional to the mass of analyte in the sample. Persulfate reacts with organic carbon in the sample at 100 degrees Celsius to form carbon dioxide that is purged from the sample and detected. | ||
| Ozone Promoted | Inorganic Carbon removal by acidification and sparging. Ozone promoted chemical oxidation of organic carbon. | ||
| UV Fluorescence | Direct measurement of aromatic hydrocarbons in water. Fluorescence occurs when a molecule absorbs an "excitation" energy of one wavelength to be measured as concentration of the hydrocarbon. May also be referred to as a spectrophotometer or a colorimeter. | ||
| Other | Other unlisted or proprietary analysis method. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Analytes Measured
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| Analytes Measured: | |||
| Your choices are... | |||
| Total Organic Carbon | The total carbon minus the inorganic carbon in the system. | ||
| Total Carbon | The total carbon in the system, it is the sum of the total organic carbon (TOC) and the inorganic carbon (IC). | ||
| Total Inorganic Carbon | The total carbon minus the total organic carbon in the system. | ||
| Nonpurgeable Organic Carbon | This is the carbon that can not be removed from the sample via gas stripping. Sometimes referred to as the TOC if the Purgeable Organic Carbon (POC) is negligible. | ||
| Purgeable Organic Carbon | This is the carbon that can be removed from the sample via gas stripping. It has a higher volatility than Nonpurgeable Organic Carbon. | ||
| Other | Other unlisted analytes measured. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Sample Introduction
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| Sample Introduction | |||
| Your choices are... | |||
| Syringe | Sample is introduced into analyzer via a syringe. | ||
| Loop Sampling | The sample loop introduction system allows repeatable analysis over a wide range of concentrations while avoiding the inherent dead volumes of syringe-based systems. | ||
| On-Line | Analyzer is mounted in process line and sample is introduced via connection to process. | ||
| Vial Auto-Sampler | The liquid-sample transfer auto-sampler removes specific sample volumes from a standard vial and transfers the sample to the common analysis vessel. A sample carousel is loaded with up to fifty vials and placed in the auto-sampler for unattended analysis. | ||
| Other | Other unlisted or proprietary sample introduction method. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Measurement Specifications
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| Measurement Range: | The range of the species of Carbon detected. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Accuracy: | A measurement of how closely the analyzer can read each measurement. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Resolution: | The smallest increment of measurement which the numeric display can indicate. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Carrier Gas Flow: | Flow rate range of the gas that carries the sample through the analyzer. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Average Analysis Time: | Time required to analyze the sample for total organic carbon. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Process Temperature Range: | The sample temperature range the device can operate in. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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User Interface Options
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| Local Interface: | |||
| Your choices are... | |||
| Analog Front Panel | The panel has analog user inputs such as potentiometers, dials, switches, for adjustment of output, ranges, etc. | ||
| Digital Front Panel | The panel uses digital keypads or menus for programming. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Computer Interface? | Can be controlled or monitored remotely with a computer via interface. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Computer Interface Options: | |||
| Your choices are... | |||
| Serial Interface | A port, or interface, that can be used for serial communication, in which only one bit is transferred at a time. Examples include RS232, RS422, RS485, USB etc. | ||
| Parallel Interface | A channel capable of transferring more than one bit at a simultaneously. Examples include PC Printer Port, Centronics etc. | ||
| Other Computer Interface | Modem, transmitter, TTL, etc. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Application Software Included? | For control or for monitoring chromatographic process. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Display Options
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| Display Options: | |||
| Your choices are... | |||
| Analog Meter | Data is displayed with an analog meter or simple visual indicator. | ||
| Digital Readout | Device uses numerical or application specific display. | ||
| Video Display | The data is presented in video form via CRT, LCD, or other multi-line forms. | ||
| None | No integral display. Output is read and displayed remotely. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Additional Output Options
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| Additional Output Options: | |||
| Your choices are... | |||
| Analog Voltage | Any analog voltage output. Output voltage is a simple (usually linear) function of the measurement. | ||
| Frequency / Modulated Frequency Pulse | Frequency or modulated frequency output (Ex. sine wave, pulse train, AM, FM). | ||
| Analog Current | Often called a transmitter. A current is imposed on the output circuit proportional to the measurement. Feedback is used to provide the appropriate current regardless of line noise, impedance, etc. Useful when sending signals over long distances. | ||
| Switch or Relay Contact | The output is a switch or alarm. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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General Features and Functionality
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| Displays Resistivity? | Analyzer also measures and displays resistivity. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Displays Temperature? | Analyzer also measures and displays temperature. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Measures Solids? | Most analyzers handle gas and liquid samples, but some may be able to analyze solid samples for total organic carbon content. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Programmable? | Analyzer has programming features. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Self Calibration? | Analyzer performs self calibration. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Extreme Environment? | For use in extreme environments. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Self Test Diagnostics? | Analyzer performs self test diagnostics. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Data Storage Options? | Analyzer has data storage options. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Environment
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| Operating Temperature: | This is the full required range of ambient operating temperature. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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