Shandong SBA-40E Bio-Sensing Analyzer

Overview

The Shandong SBA-40E Bio-Sensing Analyzer is a dedicated amperometric biosensor-based instrument engineered for rapid, selective, and quantitative analysis of clinically and industrially relevant metabolites—including glucose, lactate, glutamate, lysine, ethanol, blood glucose, and blood lactate—in complex biological and process matrices. It operates on the principle of enzyme-immobilized electrochemical transduction: analyte-specific enzymes (e.g., glucose oxidase, lactate oxidase, glutamate oxidase) are covalently immobilized onto platinum or carbon working electrodes; upon substrate binding, enzymatic reactions generate stoichiometric quantities of hydrogen peroxide (H₂O₂), which is electrochemically oxidized at a fixed applied potential (typically +0.6 V vs. Ag/AgCl), yielding a current signal linearly proportional to analyte concentration. This Clark-type amperometric architecture ensures high specificity, minimal interference from turbidity or chromophores, and robust performance in undiluted whole blood, fermentation broths, cell culture supernatants, and food extracts—without sample pretreatment.

Key Features

• Rapid single-sample assay cycle: ≤60 seconds total (20 s measurement + 25 s automated wash + residual equilibration)
• Low sample consumption: only 25 µL per determination—critical for precious clinical or small-volume bioprocess samples
• High analytical precision: relative error < ±2% across full calibration ranges, validated per CLSI EP15-A3 protocol
• Wide dynamic quantification range: glucose and lactate up to 100 mg/dL (5.55 mM and 11.1 mM, respectively); ethanol and lysine up to 100 mg/dL; glutamate up to 100 mg/dL; blood lactate up to 100 mg/dL
• Resolution: 0.1 mg/dL (≈0.0055 mM for glucose) or 0.1 mM—enabling detection of subtle metabolic shifts in real-time fermentation monitoring
• Integrated dual-channel electrochemical detection system with independent enzyme membrane cartridges for simultaneous or sequential dual-analyte profiling (e.g., glucose/lactate, glutamate/lysine)
• Large backlit blue LCD display with intuitive Chinese-language menu interface—no manual required for routine operation
• Upgraded peristaltic fluid-handling system featuring industrial-grade silicone tubing and high-cycle-life pump heads (rated >10× service life vs. SBA-40C)
• Dedicated PC communication software supporting Windows OS (7/10/11) for remote parameter configuration, data retrieval, audit-log export, and instrument diagnostics

Sample Compatibility & Compliance

The SBA-40E accepts direct injection of unfiltered, undiluted liquid samples including whole blood, serum, cerebrospinal fluid (CSF), microbial fermentation broth, hydrolysates, ion-exchange eluates, tissue homogenates, fruit juices, and alcoholic beverages. Its enzyme-membrane architecture inherently rejects interference from hemoglobin, bilirubin, turbidity, and particulates—eliminating centrifugation or filtration steps. The system complies with fundamental requirements of ISO 15197:2013 (in vitro diagnostic test systems for blood glucose monitoring) for accuracy and repeatability. While not CE-IVD or FDA 510(k)-cleared as a medical device, its operational protocols align with GLP principles for non-clinical laboratory studies (OECD Series on Principles of Good Laboratory Practice). Data integrity meets ALCOA+ criteria when used with PC software enabling time-stamped audit trails and user-access controls.

Software & Data Management

The bundled Windows-compatible SBA Control Suite provides secure bidirectional communication via RS-232 or USB-to-serial interface. Users can configure calibration curves (linear or 4-parameter logistic), set alarm thresholds, define auto-zero intervals, and schedule periodic reaction chamber rinsing. All measurements are timestamped and stored internally (≥1,000 records) with metadata (operator ID, sample ID, membrane lot, calibration date). Exported datasets use a structured .csv format compatible with LIMS integration and statistical analysis platforms (e.g., JMP, GraphPad Prism). Audit logs record all parameter changes, data deletions, and calibration events—supporting traceability under FDA 21 CFR Part 11 when combined with organizational procedural controls.

Applications

• Biopharmaceutical Fermentation: Real-time monitoring of glucose, lactate, and glutamate in penicillin, cephalosporin, and natamycin production bioreactors
• Amino Acid & Organic Acid Industry: Process control of monosodium glutamate (MSG), lysine, citric acid, and lactic acid fermentations
• Biofuel Production: Quantification of ethanol and butanol in lignocellulosic hydrolysate fermentations
• Food & Beverage QA/QC: Rapid assessment of sugar/alcohol content in wines, beers, soft drinks, and hydrolyzed vegetable proteins
• Clinical & Preclinical Research: Blood glucose and lactate profiling in rodent models, ex vivo organ perfusion studies, and toxicology assays
• Animal Nutrition: Lysine quantification in feed formulations and corn/soybean meal hydrolysates
• Academic Research: Teaching labs in biochemistry, metabolic engineering, and industrial microbiology

FAQ

What enzyme membranes are included with the standard SBA-40E configuration?

The base unit ships with two glucose oxidase membranes and two lactate oxidase membranes. Glutamate, lysine, and ethanol enzyme cartridges are available as optional accessories.
Is calibration required before each analysis session?

A two-point calibration (zero and mid-range standard) is recommended before daily use. The instrument supports automatic zero-point adjustment via buffer flush.
Can the SBA-40E operate continuously for extended bioprocess monitoring?

Yes—its programmable hourly reaction chamber refresh cycle maintains electrode stability during unattended overnight operation.
What is the shelf life and storage requirement for enzyme membranes?

Enzyme membranes must be stored at 2–8 °C in sealed desiccated vials; functional shelf life is 6 months from manufacture date.
Does the system support GLP-compliant electronic signatures?

The PC software enables user-defined operator IDs and password-protected access levels; full 21 CFR Part 11 compliance requires site-level validation and SOP implementation.