20-00999 - Specification and Description Word.docx

SPECIFICATIONS AND DESCRIPTIONS

The following specifications must be met in order to fulfill this bona fide need, justified by this procurement request.

Specifications are as follows:

CLIN 0001 - For TOC/TN analysis:

High-end TOC/TNb analyzer designed for interfacing with an IRMS.

Capable of simultaneous measuring C and N isotope ratios in aquatic samples. High temperature combustion unit (up to 1,200 C) with a 10 year warranty, jet injection of oxygen, detection limit of 5 ppm to 60,000 ppm for carbon and 25 ppm to 60,000 ppm for dissolved nitrogen.

No use of chemicals or UV oxidation techniques for TOC analysis.

Furnace system with a roll-out design.

Combustion gases in the form of CO2 and N2 are separated by two sequential adsorption columns with purge and trap chromatography.

Volume of detection between 0.05 and 3 mL.

An integrated auto sampler with 32 sample positions, with the ability to be reloaded during analysis.

Individual sample degassing capabilities.

All tubing and seals made of fluoropolymer plastics.

Control of the TOC analyzer manged completely by the IRMS control software.

All instrument functions including gas flow and pressure are digitally controlled.

Bubble elimination syringe feature.

A low concentration module with chiller.

Provides 100% C and N recovery.

CLIN 0002 For CNS analysis:

Complete simultaneous CNS isotope ratio analyses designed for interfacing with an IRMS and uses the same interface/connection as the TOC/TN instrument.

High temperature combustion unit (up to 1,200 C) with a 10 year warranty, jet injection of oxygen.

Concentration range from ppm to pph or 20 mg C and 15 mg N.

80 position auto sampler that is non-stackable.

CLIN 0002 (Continued) The autosample has the capability to be non-sealed and able to add samples during an analytical sequence.

Sample introduction should include a discrete helium flush.

The furnace should be a roll-out design.

It should be possible to analyze very high ratios of C:N (7000:1) and C:S (5000:1) samples with guaranteed baseline separation.

The instrument should make use of dynamically heated gas separation columns for CO, CO2 and SO2.

Control of the system and consolidation of the elemental composition results should be performed through the IRMS control software.

Purge trap chromatography through 3 specific columns.

The ability to backflush the system for separation of pyrolysis of oxygen.

Use the same controls as the TOC/TNb instrument.

CLIN 0003 – Chiller Liquid-cooled recirculating chiller Lauda Microcool MC 600 or like item. This item is essential for low concentration module for TOC/TN analysis. Chiller must contains all the necessary adaptors and hoses for connecting the iso TOC cube LCM module to the cooling unit.

CLIN 0004 - All consumables and axillary supplies needed to ensure high quality and accuracy of sample processing for both TOC/TN analysis (at least 3000 samples) and CNS analysis (at least 4000 solid samples), a capsule press for POC sample prep and analysis, and PC for control of instrumentation with required instrumentation software.

CLIN 0005 - Shipping - Prior to shipping the equipment, contact Mike Ryan, 734-741-2024 for COVID-19 shipping guidance. The government reserves the right to delay shipment of equipment due to the COVID-19 pandemic.

Invoices should be directed to Mike Ryan, mike.ryan@noaa.gov; 734-741-2024.