Zhiyunda ZYD-108 Portable Fluorescence Whitening Agent Detector
| Brand | Zhiyunda |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | ZYD-108 |
| Pricing | Upon Request |
Overview
The Zhiyunda ZYD-108 Portable Fluorescence Whitening Agent Detector is a field-deployable optical screening instrument engineered for rapid qualitative and semi-quantitative detection of fluorescent whitening agents (FWAs) in food matrices. It operates on the principle of ultraviolet-induced fluorescence excitation and visual/photometric assessment under controlled dark-field conditions. Designed in strict accordance with the Chinese agricultural industry standard NY/T 1257–2006 (“Detection of Fluorescent Substances in Edible Mushrooms”), the instrument enables regulatory personnel to perform on-site screening for illegally added optical brighteners—including stilbene-based compounds (e.g., DSB, CBS-X) and coumarin derivatives—commonly misused in edible fungi, eggshells, fruit surfaces, and polymeric food packaging materials. Its compact, battery-compatible architecture supports deployment in resource-limited environments such as county-level food safety supervision stations, rural market inspection units, and mobile testing laboratories.
Key Features
- Dual-access dark chamber design: Front-opening door with secondary side access port facilitates rapid sample loading/unloading and accommodates irregularly shaped specimens (e.g., whole mushrooms, intact eggs, or folded packaging films).
- Direct visual observation window: Integrated UV-blocking acrylic viewport allows real-time monitoring of fluorescence response without opening the chamber, minimizing ambient light interference and operator exposure.
- Adjustable dual-wavelength UV source: Equipped with a 365 nm UVA lamp (±5 nm bandwidth) mounted on a pivot arm, enabling precise angular alignment to illuminate sample surfaces uniformly—even at oblique angles—while avoiding shadowing artifacts.
- Integrated visible-light reference illumination: White LED array (CCT 5000 K, CRI >90) provides calibrated background lighting for comparative assessment of natural vs. induced fluorescence intensity and color tone.
- Acoustic end-of-cycle alert: Audible signal activates automatically upon completion of the preset exposure interval (user-selectable: 10–60 s), ensuring consistent dwell time across operators and reducing procedural variability.
- Ruggedized portable chassis: IP54-rated enclosure with shock-absorbing rubber bumpers and fold-down carrying handle meets MIL-STD-810G drop resistance requirements for field transport.
Sample Compatibility & Compliance
The ZYD-108 accommodates solid, semi-solid, and flexible substrates without requiring solvent extraction or derivatization. Validated sample types include fresh and dried edible mushrooms (e.g., Lentinula edodes, Auricularia auricula), chicken and duck eggs, citrus rinds, plastic and paper-based food packaging, and textile swabs used in food contact surface verification. All operational protocols align with NY/T 1257–2006 methodology for initial screening. While not a quantitative HPLC replacement, the instrument satisfies Tier-1 triage requirements under China’s GB 14881–2013 “General Hygienic Standard for Food Production”, and supports documentation traceability for GLP-aligned field audits. Device calibration is verified using NIST-traceable fluorescent reference standards (SRM 2950a) prior to each shift.
Software & Data Management
The ZYD-108 operates as a standalone hardware platform with no embedded software or digital data logging. Results are recorded manually using standardized field log sheets (Form FW-01 Rev.3), which include observer ID, sample ID, UV exposure duration, observed fluorescence intensity (graded on a 4-point ordinal scale: none, weak, moderate, strong), spatial distribution pattern, and spectral hue notes (blue-white vs. violet-blue emission). Optional companion Android application (Zhiyunda FieldLog v2.1) supports barcode-scanned sample registration, geotagged photo capture of chamber views, and CSV export compatible with national food safety surveillance databases (e.g., China’s NIFDC Integrated Monitoring System). Audit trails comply with basic ALCOA+ principles for raw field data integrity.
Applications
- Routine surveillance of wholesale mushroom markets for unauthorized FWA adulteration
- Verification of optical brightener migration from food-grade packaging into high-moisture products
- Pre-slaughter poultry farm inspections targeting shell-coating contaminants
- Border inspection screening of imported dried fruits and nuts exhibiting unnatural luminescence
- Training tool for junior inspectors in fluorescence-based food fraud recognition
- Complementary triage step preceding confirmatory LC-MS/MS analysis in central labs
FAQ
Does the ZYD-108 provide quantitative concentration values?
No. It delivers qualitative/semi-quantitative classification per NY/T 1257–2006 Annex A; quantification requires HPLC-FLD or LC-MS/MS.
Is the UV lamp replaceable by the user?
Yes. The 365 nm lamp module is field-serviceable with standard Torx T10 tools and ships with two spares per unit.
Can the device be used for non-food applications?
While optimized for food matrices, it may detect FWAs in textiles or paper—though validation against ISO 105-B02 or GB/T 7573 is required for formal reporting.
What power sources are supported?
Internal rechargeable Li-ion battery (8 h runtime), USB-C input (5 V/2 A), or optional 12 V DC vehicle adapter.
Is the observation window certified for UV protection?
Yes. Acrylic viewport meets ANSI Z87.1–2020 UV filtration standards (blocking >99.9% of UVC and UVB, 95% of UVA).
