Jenway 7415 Nano Ultra-Micro Spectrophotometer

Overview

The Jenway 7415 Nano Ultra-Micro Spectrophotometer is a benchtop, microvolume UV-Vis spectrophotometer engineered for rapid, precise quantification and purity assessment of nucleic acids and proteins without dilution or cuvettes. It operates on the principle of surface-tension-mediated microvolume measurement: a 0.5 µL sample forms a stable liquid column between two vertically aligned quartz optical surfaces—eliminating pathlength variability and enabling direct absorbance measurement at defined wavelengths (e.g., 260 nm, 280 nm, 230 nm). This optical architecture delivers high reproducibility (CV < 1.5% across repeated dsDNA measurements) and eliminates inter-sample carryover through rapid, non-invasive cleaning. Designed for routine QC in molecular biology labs, core facilities, and pharmaceutical development environments, the instrument supports full-spectrum scanning (198–1000 nm) with 5 nm spectral bandwidth and ±2 nm wavelength accuracy—meeting foundational requirements for method validation per ISO/IEC 17025 and supporting alignment with USP and CLSI EP25-A guidelines for photometric performance verification.

Key Features

• Microvolume capability: Measures 0.5 µL native samples—no dilution, no cuvettes, no pipetting errors from volume transfer
• Integrated Android-based OS with 7-inch capacitive touchscreen: Intuitive navigation, multi-language UI (English, French, German, Spanish, Italian), and responsive workflow management
• Stainless-steel optical head with embedded fused-silica lenses: Chemically inert, scratch-resistant, and optimized for consistent meniscus formation
• Onboard 10 GB internal storage: Secure local archiving of methods, calibration records, and result sets—including audit-ready metadata (timestamp, operator ID, instrument serial)
• Dual USB ports (front-panel): Direct connection to flash drives for data export (CSV, PDF), firmware updates, or thermal printer integration
• Preconfigured assay protocols: Fully validated nucleic acid (ssDNA, dsDNA, RNA, oligos) and protein (Bradford, Lowry, BCA, Biuret, Direct UV) quantification workflows with built-in ratio calculations (A260/A280, A260/A230) and optional 320 nm background correction

Sample Compatibility & Compliance

The 7415 Nano accommodates aqueous and low-viscosity biological samples—including purified DNA, RNA, plasmid preps, PCR products, protein lysates, and antibody solutions—with minimal matrix interference. Its optical path is insensitive to minor particulate presence due to fixed geometry and short effective pathlength (~1 mm). The instrument complies with IEC 61010-1 for laboratory equipment safety and meets electromagnetic compatibility (EMC) requirements per EN 61326-1. While not certified for GMP production environments out-of-the-box, its data integrity features—including user-accessible audit logs, timestamped results, and exportable CSV reports—support alignment with FDA 21 CFR Part 11 when deployed with appropriate procedural controls (e.g., role-based access, electronic signatures via external LIMS integration). Routine performance verification can be performed using NIST-traceable SRM 930e neutral density filters or certified DNA standards.

Software & Data Management

The embedded Android OS hosts a purpose-built application with GLP-aligned data handling: all measurements are automatically time-stamped and associated with user profiles. Methods support up to 20 standard points with 5 replicates each for curve fitting (linear, quadratic, or 4PL), and intra-assay repeatability is logged per run. Raw absorbance spectra (1 nm resolution across 198–1000 nm) are stored alongside processed results. Optional CPLive connectivity enables encrypted, HTTPS-based upload of CSV-formatted datasets to designated cloud repositories or institutional servers—facilitating centralized review, batch trending, and cross-lab comparison. Exported files contain full method parameters, raw spectra, and calculated concentrations—enabling traceable reanalysis in third-party tools such as GraphPad Prism or R.

Applications

• Routine nucleic acid quantification in NGS library prep and qPCR workflow QC
• Assessment of RNA integrity via spectral shape analysis (e.g., detection of 230 nm contaminants invisible to A260/A280 alone)
• Protein concentration determination in purification monitoring (e.g., post-affinity elution, SEC fractions)
• Verification of oligonucleotide synthesis yield and desalting efficiency
• Educational use in undergraduate biochemistry labs for hands-on spectroscopy fundamentals
• Supporting ISO 15195-compliant calibration verification in accredited testing laboratories

FAQ

What is the minimum detectable DNA concentration?
The instrument reliably quantifies dsDNA down to 2 ng/µL when using the 0.5 µL sample volume and standard 260 nm absorbance protocol.
Does the 7415 Nano require regular recalibration?
No factory recalibration is required under normal operation; however, daily performance verification using a reference standard (e.g., 50 ng/µL dsDNA in TE buffer) is recommended per ISO/IEC 17025 clause 7.7.
Can absorbance spectra be exported for external analysis?
Yes—full-resolution (1 nm step) spectral data are saved in CSV format and include wavelength, absorbance, and metadata headers.
Is the optical head compatible with viscous or detergent-containing samples?
Samples with viscosity >10 cP or >0.1% SDS may disrupt meniscus stability; dilution or alternative measurement (e.g., cuvette mode on companion instruments) is advised.
How is data integrity maintained during power interruption?
All active measurements are auto-saved to non-volatile memory prior to display; unsaved results persist through reboot and resume upon restart.