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Product Details:
Payment & Shipping Terms:
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| Test Matrix: | Seafood | Read Results: | 3-5 Minutes |
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| Delivery Date: | 1 Working Day | Storage: | Room Temperature |
| Packing: | 40/50 Tests Per Box | Shelf Life: | 15 Months |
| Non Toxin: | Harmless |
Not just a rapid test supplier — a long-term, globally proven food safety partner.
Product Overview
The NANKAI 4-in-1 Rapid Test Kit is a lateral flow immunochromatographic assay designed for simultaneous screening of:
in fish, shrimp and other aquatic products.
Malachite Green and Crystal Violet, together with their metabolites, remain among the most closely monitored prohibited substances in international seafood trade. Regulatory authorities, importers, exporters, retailers and inspection laboratories routinely screen aquatic products for these residues to support seafood safety compliance and market access.
Designed for high-frequency testing environments, this rapid test kit helps users identify potential residue risks quickly and efficiently while simplifying routine seafood safety inspection workflows.
Trusted Worldwide • 20+ Years of Expertise • Field & Laboratory Ready • Certified Analytical Laboratory Verification
NANKAI seafood safety solutions have been widely applied in government monitoring programs, seafood wholesale markets, rapid testing laboratories, seafood processors, exporters, importers and large-scale food safety screening projects.
Advantages & Key Features
3–5 Min Result Reading
Rapid result reading within 3–5 minutes, supporting fast seafood safety screening decisions.
CE & ISO Certified
Manufactured under certified quality systems and aligned with international quality requirements.
High-Sensitivity Single-Use Test
Designed for reliable residue screening and confident pass/fail decision-making.
Visual Readout, No Instrument Required
Results can be interpreted by the naked eye, making the kit suitable for routine field inspection and on-site testing.
Field & Laboratory Ready
Suitable for both laboratory pre-screening and on-site seafood safety inspection workflows.
Room Temperature Storage
Stored at room temperature without cold-chain transportation or refrigerated storage.
Non-Toxic Formulation
Designed for safe routine use in high-frequency testing environments.
Wide Sample Coverage
Applicable to fish, shrimp, shellfish and other aquatic products.
Four High-Priority Targets in One Test
Simultaneous screening of Malachite Green, Leucomalachite Green, Crystal Violet and Leuco Crystal Violet, helping improve testing efficiency and simplify seafood inspection workflows.
Typical Applications
Aquaculture Farms
Routine prohibited-substance monitoring and aquaculture safety screening.
Seafood Processing Plants
Incoming raw material inspection and batch quality control.
Seafood Wholesale Markets
High-frequency seafood safety screening and market supervision programs.
Government Monitoring Programs
Large-scale prohibited-substance monitoring and seafood safety inspection workflows.
Seafood Export Programs
Supports export-oriented residue control and buyer compliance requirements.
Import Verification Programs
Supports supplier qualification and imported seafood safety verification.
Supermarket & Retail Supply Chains
Supplier qualification, incoming inspection and seafood safety verification programs.
Food Safety Laboratories
Rapid pre-screening before confirmatory analytical testing.
Why NANKAI for Seafood Safety Screening
15+ Years of Real-World Seafood Safety Application Experience
NANKAI seafood rapid testing solutions have been continuously applied in aquatic product safety screening programs, regulatory monitoring workflows, wholesale market inspection systems and enterprise quality control applications for more than 15 years.
Industry-Leading Performance in Seafood Safety Programs
NANKAI has been one of China's most widely used seafood safety rapid testing solution providers, supporting government monitoring programs, inspection laboratories, seafood wholesale markets, supermarket supply chains and seafood exporters.
Proven Through Millions of Real-World Screening Applications
Our products have been repeatedly verified through large-scale seafood safety screening programs involving government agencies, seafood inspection laboratories, aquaculture operations, processors, exporters, importers and retail supply chains.
Trusted by Regulators, Industry and Buyers
Supports seafood safety programs that require regulatory confidence, buyer confidence and reliable screening performance throughout the supply chain.
Certified Analytical Laboratory Support
Supported by three CMA, CATL & CNAS certified analytical laboratories equipped with LC-MS/MS and GC-MS/MS analytical platforms for matrix verification, reference method comparison and performance evaluation.
Digital Food Safety & Traceability Experience
Extensive experience supporting food safety monitoring systems, traceability platforms, rapid testing laboratories and large-scale seafood regulatory projects.
Technical Information
Target Analytes
Sample Types
Test Type
Lateral Flow Rapid Test Kit
Result Type
Rapid Visual Screening
Testing Time
3–5 Minutes
Storage Conditions
4–30°C
No refrigeration required during routine storage.
Shelf Life
15 Months
Delivery Time
Typically Available for Shipment Within 1 Working Day
Available Seafood Safety Rapid Test Targets
Banned Substances & Illegal Additives
Antibiotics & Veterinary Drug Residues
Nitrofuran Metabolites
Heavy Metals & Toxic Elements
Seafood Quality Indicators
Contact Us
Looking for reliable screening solutions for Malachite Green, Leucomalachite Green, Crystal Violet and Leuco Crystal Violet residues in seafood and aquaculture products?
Contact NANKAI Biotech for quotations, product catalogs, technical documents, validation information and application support.
Request Product Information
Get Quotation
Contact Us
Why Choose Us?
Proven in Major International Events
Our rapid testing technologies have supported large-scale food safety monitoring programs
in high-standard international environments,
demonstrating reliability, speed, and operational efficiency
under real-world conditions.Supporting food safety monitoring in:
• 2008 Beijing Olympic Games
• 2010 Shanghai World Expo
• 2023 Hangzhou Asian Games
Global Trust & Real-World Validation
More Than a Test Kit — An Integrated Diagnostic Platform
20+ Years of Expertise • Trusted in Global Food Safety Programs
Unlike typical reagent suppliers, we operate as an integrated diagnostic
platform combining:
• In-house R&D
• Large-scale manufacturing
• Certified cleanroom production
• Independent third-party laboratories
Ensuring end-to-end quality control from development to real-world application.
Protect Your Shipment Before It Leaves
Don’t wait for laboratory results to discover a problem.
Screen early. Act early. Ship with confidence.
Contact us today to learn more about our cadmium rapid testing solutions for durian and tropical fruit exporters.
For new products, please contact us via,
sale@nkbiotech.com
Whatsapp: 86-151-5809-6930
Contact Person: Miss. Bella
Tel: 0086-151-5809-6930
Fax: 86-571-87114601
