Attachment 1 - Specifications.pdf

USDA-ARS- Northern Great Plains Research Lab 1701 10th AVE SW Mandan ND 58554 Segmented Flow Analyzer

The USDA ARS Northern Great Plains Research Lab in Mandan ND is in need of a segmented flow colorimetric analyzer. The machine should meet or exceed the following specifications:

Procurement Specification Report: Advanced Segmented Flow Analyzer System

1. Executive Summary

This report outlines the specifications and requirements for the procurement of an advanced segmented flow analyzer (SFA) system for the USDA ARS Northern Great Plains Research facility. The proposed system will enhance our analytical capabilities in environmental, agricultural, and water quality research, allowing for high-throughput, multi-parameter analyses with improved efficiency and accuracy.

Key features of the required system include:

• Segmented flow analysis technology for precise sample and reagent handling

• Simultaneous analysis of at least 3 parameters, expandable to 5

• High sample throughput (minimum 60 samples/hour, up to 120 samples/hour for certain methods)

• Excellent precision (≤2% RSD) and low detection limits (µg/L range)

• Flexibility for various sample types and analytical methods

An expected implementation timeline of 6 months from approval to full operation.

2. Introduction

Segmented flow analysis (SFA) is a critical technique in our research, enabling the rapid and accurate determination of multiple analytes in diverse sample matrices. The acquisition of a state-of-the-art segmented flow analyzer will significantly enhance our laboratory's capabilities, supporting ongoing and future research projects in soil science, water quality, and agricultural sustainability.

3. Justification for Procurement

The procurement of this instrument is justified by:

• Increased sample throughput, reducing analysis time and costs

• Improved data quality through enhanced precision and lower detection limits

• Greater flexibility in method development for diverse research needs

• Alignment with USDA ARS research priorities in environmental and agricultural sciences

• Potential for new collaborative research opportunities

4. Technical Specifications

4.1 Segmented Flow Analysis System

• Automated segmented flow analysis system with at least 3 independent analytical channels

• Integrated digital air bubble injection system for creating discrete reaction segments

• Capability to analyze at least 3 parameters simultaneously

• Modular design allowing for future expansion to at least 5 channels

• Glass hydraulic components with 2.0 mm internal diameter for optimal flow characteristics and chemical inertness

4.2 Sample Handling

• Automated sampler with capacity for at least 120 samples

• Ability to handle sample volumes from 0.5 mL to 5 mL

• Random access and priority sampling capabilities, including:

o Ability to insert and analyze priority samples without stopping the current run o Automatic reanalysis of samples based on predefined criteria o Intelligent calibration and quality control sample insertion throughout long runs

• Separate rack for calibration and quality control standards (minimum 20 positions)

• Stainless steel and PEEK sample probes for compatibility with various sample types

• Option for multiple probe configurations (up to 4) on one sampler

4.3 Fluid Handling

• Peristaltic pump system with precision tubing

• Pump capacity for at least 30 pump tubes plus up to 8 air supply tubes

• Digital air injection system synchronized with pump rollers

• Computer-controlled platen engage/release for remote system startup and shutdown

• Leak detection system with automatic pump shutdown

• Option for automated dilution and reagent switching valves

4.4 Detection System

• Dual beam photometric detection system with real-time baseline correction

• Wavelength range of at least 340-880 nm

• LED light source with minimum 40,000 hours lifespan

• Flow-cell options of various path lengths (10mm, 30mm, 50mm, and 500mm)

• Automatic wavelength selection and optimization

4.5 Chemistry Module

• High-performance chemistry module with glass components for inert properties

• On-board proportional temperature control for reaction optimization

• Optional dialyzer for sample clean-up and matrix elimination

• Capability for in-line sample treatment (e.g., UV digestion, distillation)

• Optional cadmium column for nitrate reduction with automated valve control

4.6 Software and Data Management

• Compatible with current Windows operating systems

• Automated quality control checks and performance monitoring

• Real-time graphical display of analysis progress

• Comprehensive data analysis tools including calibration curve fitting and outlier detection

• Data export capabilities in common file formats (CSV, Excel, PDF)

• LIMS integration features

• Audit trail and electronic signature capabilities for regulatory compliance

• Remote access and control capabilities

4.7 Method Flexibility

• Ability to run EPA-approved methods for water and soil analysis using SFA technology

• User-adjustable method parameters including reaction time, temperature, and reagent ratios

• Compatibility with different sample matrices (e.g., water, soil extracts, plant digests, seawater)

• Method development tools for creating and optimizing new analytical procedures

5. Performance Requirements

• Precision: ≤2% RSD for standard solutions, ≤3% RSD for typical environmental samples

• Accuracy: Within ±5% of certified values for standard reference materials

• Sensitivity: Detection limits in the low µg/L range for common nutrients (e.g., <0.1 µg/L for PO4-P, <1 µg/L for NO3-N)

• Linear range: At least 3 orders of magnitude for major nutrients

• Throughput: Minimum 60 samples per hour for standard nutrient analyses, with capability for up to 120 samples per hour for certain methods

• Carryover: <1% between high and low concentration samples

• Sample matrix tolerance: Ability to handle samples with up to 3% dissolved solids

• Drift: <5% over an 8-hour run period

• Method changeover time: <30 minutes for standard method switches

• Warm-up time: System ready for operation within 30 minutes of startup

• Reagent consumption: Optimized flow rates to minimize reagent use while maintaining performance

• Sample volume: Capability to analyze sample volumes as low as 200 µL for limited sample applications

• Multi-tasking: Ability to perform data processing and method development while running analyses

6. Training and Support

6.1 Initial Training

• Comprehensive on-site training program for up to 5 laboratory personnel

• Training to cover instrument operation, software use, method development, and basic troubleshooting

5.2 Documentation

• Comprehensive user manuals and reference guides

• Electronic copies of training materials

5.3 Ongoing Support

• Access to technical support hotline

• Provision of software updates

• Option for advanced user training or refresher courses

8. Warranty and Service

• Minimum 12-month warranty on parts and labor

• Options for extended warranty and service contracts

• Specified response times for on-site service (e.g., within 48 hours of service call)

• Availability of preventive maintenance programs

• Remote diagnostic capabilities

• Guaranteed availability of spare parts for at least 7 years after purchase

Quantity: 1

Please include any discounts and extended warranty and one consumables kit in this purchase.

Price to include any delivery charges to:

USDA ARS

1701 10th AVE SW Mandan ND 58554