- Company : Shenzhen Biokau Sci-tech Co.,ltd
- Region : Guangdong , China
- Category : Chemicals > Chemical Reagents
- Quantity : 1
- Contact Person : Samara Duan|||Sales Manager
- Telephone :
- Mobile phone :
- Website : www.biokau.com
- Email : [email protected]
- Instant Messenger : skype:samara(foodsafety...)
- Update : Apr/07/2015
Product Details
1. Brief This product is used for testing Nitrofuran(AHD) residue in honey samples. The whole testing needs about 2h, suitable for all kinds of enterprises and inspection agencies. The detection limit is 0.5ppb?ug/kg? 2. Components 1) Nitrofuran (AHD) colloidal gold rapid test strip (Including tablet, gold label well, dropper, desiccant) 50 pieces/kit 2) Manuals 1 piece/kit 3) 2-Nitrobenzaldehyde (C7H5NO3) 1 bottle/kit 4) Nitrofuran redissolving solution 1 bottle/kit 3. Equipments required but not provided Micropipettes, nitrogen-drying device or air-drying device, water bath, centrifuge, balance (a reciprocal sensibility of 0.01 g); 4. Sample preparation] 1) Weigh 3g honey sample into 50ml centrifuge tube, add 4ml deionized water, 0.5ml 1M HCl, 0.2ml 2-Nitrobenzaldehyde (C7H5NO3), mix thoroughly for 3 min; 2) Incubate in water bath at 60? for 1h; 3) Take the tube out from the water bath, add 5ml 0.1M K2HPO4, 0.4ml 1M NaOH, 6ml ethyl acetate, mix thoroughly for 1min, centrifuge at 4000r/min for 5min; 4) Take 3ml supernatant into 5ml centrifuge tube, blow to dry by air at 60?; 5) Add 0.5ml N-hexane and 0.3ml nitrofuran redissolving solution to the dry tube, mix evenly, centrifuge at 4000r/min for 1min (or put aside until stratification); 6) Use Micropipettes to absorb 120ul down-layer solution into gold label well, ready to test. 5. Operation procedures 1) Read the Instruction, return the reagents to room temperature (20?~30?) before testing. 2) Take out the test strip, put it on desk flatly, as the following picture on the right. (Use it immediately after opening the package.) 3) Absorb 120ul solution into gold label well, wait for 2 min, use small dropper to blow and beat until the red material is completely dissolved, wait to react for 2min, 4) Use dropper absorb all sample from the well, vertically add it into sample collecting well (as following pictur
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