HunterLab ColorQuest XE Benchtop Spectrophotometer

Overview

The HunterLab ColorQuest XE is a high-precision benchtop spectrophotometer engineered for rigorous color measurement and spectral analysis of liquid beverages—including opaque, translucent, and transparent formulations. Operating on the principle of dual-beam spectral photometry, it employs a 256-element diode array detector coupled with a high-resolution concave holographic grating to deliver stable, traceable, and reproducible spectral data across the visible spectrum (400–700 nm). Its d/8° integrating sphere geometry—compliant with CIE No. 15, ISO 7724-1, ASTM E1164, DIN 5033-7, and JIS Z 8722 Condition C—enables simultaneous evaluation of both reflectance and transmittance modes under standardized illumination. The instrument’s optical architecture is optimized for beverage quality control, supporting quantitative assessment of color difference (ΔL*, Δa*, Δb*, ΔE*ab), haze, turbidity, transmission (%T), remission (%R), opacity, and spectral absorbance—critical parameters in QC/QA workflows for tea infusions, fruit juices, carbonated soft drinks, and ready-to-drink functional beverages.

Key Features

• Dual-path optical design ensures long-term photometric stability and minimizes drift between measurements.
• 15.2 cm (6″) integrating sphere coated with Spectraflect®, a highly reflective, non-yellowing barium sulfate-based material certified for spectral uniformity and aging resistance.
• Pulsed xenon lamp filtered to simulate CIE Standard Illuminant D65; rated for >1,000,000 flashes with field-replaceable module—eliminating routine lamp maintenance.
• Three-sided open transmittance chamber accommodates standard and custom cuvettes (10 mm, 20 mm, 50 mm path lengths) per ASTM D1209, D5386, and ISO 4630.
• Automated specular component inclusion/exclusion (SCI/SCE) via motorized baffle—essential for distinguishing surface gloss effects from bulk color in glossy or varnished packaging substrates.
• Large-area viewing (25.4 mm illumination / 19.0 mm measurement) as standard; optional small-area (9.5 mm / 6.3 mm) and micro-area (4 mm) lenses support targeted analysis of heterogeneous samples or small-volume formulations.
• Measurement time < 1 second; minimum inter-measurement interval of 3 seconds enables high-throughput batch testing in production environments.

Sample Compatibility & Compliance

The ColorQuest XE supports direct transmittance measurement of clear liquids, suspension-based beverages (e.g., pulpy orange juice), and emulsified systems (e.g., dairy-based drinks) using standardized glass or quartz cuvettes. For opaque or highly scattering samples—such as brewed tea, coffee extracts, or plant-based milks—it performs reflectance-mode analysis on white-background holders or disposable sample cups. All measurement protocols align with global regulatory and industry standards: ASTM D2745 (color of liquids), D5386 (transmission color of liquids), ISO 4630 (beer color), and AOAC Official Methods for beverage quality. Data integrity meets GLP/GMP requirements through audit-trail-enabled software and optional 21 CFR Part 11 compliance packages.

Software & Data Management

Controlled via EasyMatch QC software (v5.x or later), the instrument supports method-driven workflows, customizable pass/fail tolerances, statistical process control (SPC) charting, and automated report generation (PDF, CSV, XML). Raw spectral data (10 nm reporting interval, <3 nm effective bandwidth, ±0.1 nm wavelength accuracy) is exportable for advanced multivariate analysis (e.g., PCA, PLS regression) in third-party platforms. The software enforces user-level permissions, electronic signatures, and full audit trails—including timestamped operator ID, parameter changes, calibration events, and result modifications—ensuring compliance with FDA 21 CFR Part 11 and EU Annex 11 requirements.

Applications

• Batch-to-batch color consistency verification for RTD tea, herbal infusions, and matcha concentrates at facilities like Uni-President and Hangzhou University’s Tea Research Institute.
• Shelf-life monitoring of anthocyanin-rich juices (e.g., pomegranate, blackcurrant) where hue shift indicates oxidation or pH-induced structural change.
• Raw material qualification of caramel colorants (E150a–d) and natural pigments (e.g., betanin, chlorophyllin) against master standards.
• Correlation of instrumental color values (L*, a*, b*, Yellowness Index, Tint) with sensory panel outcomes in product development labs.
• Regulatory submission support for FDA GRAS dossiers, EFSA evaluations, and China GB standards requiring objective color metrics.

FAQ

Is the ColorQuest XE compliant with FDA 21 CFR Part 11 for electronic records?
Yes—when configured with EasyMatch QC’s Part 11 option, it provides electronic signature enforcement, audit trail logging, and role-based access control.
Can it measure color in PET bottles without sample transfer?
No—the instrument requires cuvette-based transmittance or reflectance measurement; direct bottle measurement is not supported due to wall interference and refractive artifacts.
What is the calibration frequency recommendation?
Annual NIST-traceable recalibration is recommended; daily verification using supplied ceramic tile and liquid standards is required per ISO/IEC 17025 QA protocols.
Does it support CIELAB 2000 (ΔE₀₀) calculations?
Yes—EasyMatch QC computes ΔE*ab, ΔE₀₀, ΔEcmc, and ΔE94 from stored spectral data, with configurable CMC (2:1) or RSL tolerances.
Is remote diagnostics or firmware update capability available?
Yes—via secure HTTPS connection to HunterLab’s Support Portal; updates are validated and version-locked to ensure measurement continuity and regulatory compliance.