Overview
Melamine test cards are immunochromatographic assays designed for rapid, on-site detection of melamine residues in food and feed products. They utilize antibody-antigen reactions to provide visual results (e.g., colored lines) within minutes. These cards are critical for industries requiring immediate screening, such as dairy processors or import/export regulators, to comply with safety standards like FDA or EU limits (2.5 ppm for infant formula). Unlike lab-based methods (e.g., HPLC), test cards prioritize speed and simplicity, though they may lack the precision of quantitative analysis. They are often used as preliminary screening tools, with positive results confirmed via advanced testing.
Physical and Chemical Properties
The test card itself is a laminated paper or plastic strip embedded with melamine-specific antibodies and colloidal gold nanoparticles. When a sample (e.g., diluted milk) is applied, melamine binds to these antibodies, triggering a visible reaction. The absence of a control line indicates invalid results. Key chemical components include the melamine antibody (typically monoclonal) and a nitrocellulose membrane for capillary flow. Storage stability is crucial; humidity or heat can degrade antibodies, leading to false negatives. Most cards have a desiccant pack to prolong shelf life.
Main Applications
Primary use cases include dairy product testing (especially in regions with past melamine scandals), pet food manufacturing, and agricultural supply chains. For example, milk collectors in rural areas rely on these cards to screen raw milk before bulk processing. They are also deployed in customs inspections to prevent contaminated imports. Some versions are adapted for solid samples (e.g., wheat gluten) after extraction. In B2B settings, high-volume kits (100+ tests/box) are preferred for cost efficiency.
Safety and Storage
While the cards pose no direct hazard, samples may contain harmful levels of melamine. Wear gloves when handling contaminated materials. Used cards should be disposed of as chemical waste in compliance with local regulations. Optimal storage involves sealed packaging at room temperature. Prolonged exposure to temperatures above 30°C may reduce sensitivity. Manufacturers often include lot numbers and expiration dates for traceability.
B2B Procurement Guide
When sourcing melamine test cards, prioritize suppliers with third-party validation (e.g., AOAC certification). Confirm the detection limit (typically 0.1-2.5 ppm) aligns with your regulatory requirements. Bulk buyers should negotiate unit pricing; discounts are common for orders exceeding 1,000 cards. Evaluate turnaround time for restocking, as supply chain delays can disrupt testing workflows. Some manufacturers offer customized cards for specific matrices (e.g., fish meal). Always request batch-specific performance data.
Related Manufacturers
- 主营：检测仪、dbp试剂盒、果蔬食品、b1检测卡、酮检测卡、胶体金快速检测卡、壳检测试纸、检测试剂盒、试剂检测盒、理化快检试剂盒、荧光定量检测快、酶联免疫试剂盒、快速检测仪器
- 主营：Elisa试剂盒、荧光定量检测、兽药残留试剂盒、胶体金检测卡、兽药残留检测卡、农药残留检测卡、保健品检测卡、真菌毒素试剂盒、黄曲霉B1、农药残留试剂盒、化妆品检测胶体金、理化类食品安全快检试剂、瘦肉精三联卡、谷物饲料荧光定量检测、粮油面粉荧光定量检测、微生物检测、沙门氏菌检测
- 主营：黄曲霉素检测试剂盒、霉菌毒素检测仪、农药残留检测试剂盒、黄曲霉检测卡、牛早孕检测卡、牛结核检测卡、瘦肉精检测卡、水产检测试剂盒、兽药残留检测试剂盒、呕吐毒素elisa试剂盒、黄曲霉荧光定量检测试纸
- 主营：elisa试剂盒、菌落总数测试片、快速检测试纸条、脱氢乙酸快速检测卡、糖精钠快速检测卡、毒死蜱检测卡、农残检测仪、便携式胶体金读数仪、食品安全检测仪、真菌毒素检测仪、多功能食品安全检测仪、粮油饲料检测试剂盒、牛奶乳制品检测试剂盒、兽药残留检测试剂盒、菌落测试片、elisa检测试剂盒、农残快速检测试剂盒、农残检测试剂盒、ATP荧光检测仪、重金属检测试剂盒、黄曲霉毒素检测试剂盒、水体病毒富集采集仪、瘦肉精检测三联卡、黄曲霉毒素快速检测试、农药残留快速检测试剂
- 主营：固含量检测仪、水分测定仪、卡尔费休微量水分测定仪、胶体金检测卡、农兽药试剂盒
- 主营：霉菌毒素定量快检产品、药物残留定量快检产品、动物疾病定量检测
- 主营：检测试剂盒、Elisa试剂盒、农残检测试剂盒、检测卡、试剂、液相检测、测试盒、比色法检测、荧光法检测