FLOWSTAR2020 Continuous Flow Analyzer

Overview

The FLOWSTAR2020 Continuous Flow Analyzer is an engineered platform for high-throughput, automated wet-chemistry analysis based on segmented flow analysis (SFA) principles. It implements air-segmented continuous flow methodology—where discrete sample and reagent zones are separated by precisely controlled nitrogen or compressed-air bubbles—to ensure reproducible reaction timing, eliminate carryover, and enable extended reaction durations up to 40 minutes. Designed for regulatory-compliant environmental and industrial testing, the system supports standardized methods including EPA 353.2, ISO 6878 (total phosphorus), ISO 6703-1 (cyanide), APHA Standard Methods 4500-NH₃, 4500-NO₂⁻, 4500-PO₄³⁻, and Chinese national standards such as HJ 665–2013 (ammonia nitrogen), HJ 667–2013 (total phosphorus), HJ 670–2013 (total nitrogen), and HY/T 147.1–2013 (marine monitoring). Its dual-beam, dual-wavelength photometer with selectable path lengths (10/30/50 mm) and stable LED or krypton lamp sources ensures high photometric accuracy across UV–Vis spectrum (270–1100 nm), while integrated dialysis membranes remove matrix interferences from turbid or colored samples without manual pretreatment.

Key Features

• True walk-away automation: fully programmable method sequencing, bubble injection via solenoid valves, and real-time status monitoring via embedded control interface
• Modular reagent carousel accommodating 100, 180, or 270 reagent positions—optimized for multi-parameter batch analysis without manual intervention
• On-line digestion modules: high-pressure autoclave-style UV digestion for total cyanide and total phosphorus quantification per ISO 6703-1 and ISO 6878
• Cadmium-reduction manifold with electrochemically controlled cadmium coil (replacing traditional cadmium columns) for nitrate-to-nitrite conversion with enhanced longevity and reproducibility
• 2-mm internal diameter tubing network engineered for robust handling of suspended solids—minimizing clogging in wastewater, soil extract, and food digestate matrices
• Low reagent consumption: typical usage <1.5 mL per test; integrated waste minimization design reduces operational cost and environmental footprint
• No pre-degassing or filtration required: air-segmentation eliminates need for sample/reagent deaeration or particulate removal prior to injection

Sample Compatibility & Compliance

The FLOWSTAR2020 accommodates diverse liquid and semi-solid sample types—including seawater, drinking water, surface/groundwater, municipal and industrial wastewater, tobacco extracts, plant tissue digests, soil leachates, fertilizer solutions, dairy and beverage products, and pharmaceutical process streams. All validated methods comply with GLP-aligned data integrity requirements: full audit trail logging, user-access controls, electronic signatures (aligned with FDA 21 CFR Part 11 readiness), and method versioning. Instrument performance verification follows ISO/IEC 17025 principles, with documented calibration traceability to NIST-traceable standards. Method validation reports include LOD/LOQ determination, precision (RSD ≤ 2.5% at mid-range), linearity (r² ≥ 0.999), and recovery studies (85–115%) across certified reference materials (CRMs) for each analyte.

Software & Data Management

The proprietary FLOWSTAR Control Suite provides intuitive graphical method builder, real-time chromatogram visualization, peak integration using both height and area algorithms, and customizable report templates compliant with ISO 14253-1 and ASTM E2655. Raw data files (.raw, .csv) retain full acquisition metadata—including timestamp, operator ID, method version, instrument configuration, and environmental sensor logs (temperature, pressure). Export formats support LIMS integration via ASTM E1394 or direct SQL database push. All data modifications are logged with immutable timestamps and user attribution, satisfying GMP/GLP audit requirements for traceability and accountability.

Applications

The FLOWSTAR2020 delivers validated quantitative results for over 150 parameters across environmental, agricultural, food safety, and industrial QA/QC laboratories. Core applications include ammonia nitrogen (NH₃-N), nitrate and nitrite, total phosphorus (TP), total nitrogen (TN), orthophosphate, silicate, sulfide, cyanide (free and total), phenol (volatile), COD (via dichromate oxidation), permanganate index (COD_Mn), chloride, sulfate, alkalinity, acidity, urea, and residual chlorine. Its adaptability extends to non-standard assays—such as enzymatic glucose detection or metal chelation-based heavy metal screening—through custom protocol development using open scripting interfaces.

FAQ

Does the FLOWSTAR2020 support regulatory compliance for EPA and ISO methods?

Yes—it natively executes EPA 353.2 (nitrate/nitrite), ISO 6878 (TP), ISO 6703-1 (cyanide), and APHA 4500-series methods, with hardware and software features aligned with 21 CFR Part 11 data integrity expectations.
Can it analyze turbid or particulate-laden samples without filtration?

Yes—the 2-mm ID fluidic path combined with inline dialysis membrane separation enables direct analysis of wastewater, soil extracts, and food homogenates without pre-filtration.
What is the typical throughput and detection limit performance?

Throughput exceeds 30 samples/hour per channel; detection limits meet or exceed those specified in cited standards—for example, NH₃-N LOD ≤ 0.01 mg/L, TP LOD ≤ 0.005 mg/L, CN⁻ LOD ≤ 0.5 µg/L—verified using CRMs and spike-recovery protocols.
Is remote diagnostics and software update supported?

Yes—secure remote access via encrypted VPN enables firmware updates, method troubleshooting, and preventive maintenance alerts through the FLOWSTAR Cloud Connect module.
How is calibration and verification managed?

Calibration curves are generated automatically using multi-point standard series; daily system suitability checks include blank drift, peak symmetry, and retention time stability—all logged with full audit trail.