Specifications include, but are not limited to: We are seeking an analyzer capable of measuring total organic carbon and total nitrogen in surface water and groundwater. We require the instrument and bid to meet the following specifications: - TOC module: measurement of total organic carbon via combustion catalytic oxidation (at 680 degrees) methods and use a thermally-stabilized (65o C) NDIR detector for maximum sensitivity and durability. o Must have wide measurement range (<1 mg/L up to 10,000 mg/L) in multiple different sample matrix types. High sensitivity unit is required, analyzing down to 4 ppb TC and 5 ppb TN. o Sample injection system must be capable of auto-dilution. o Must have capacity to measure total organic carbon (TOC), non-purgeable organic carbon (NPOC), total carbon (TC), and total inorganic carbon (TIC). - TN module: measurement of total nitrogen concentrations with chemiluminescence detection method. o Must have wide measurement range (up to 10,000 mg/L). o Must allow for simultaneous measurement of TC/NPOC and TN. - Bids should include consumables required to set up and run instrument (vials, standards, consumables, etc). - High capacity autosampler included in price. Autosampler must include “sparge ahead” feature that allows the next sample to acidified and sparge while the current sample is being analyzed. - Must include an built-in air purifier to eliminate the need for high purity air tanks or a separate instrument for air purification.