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Kit Test ELISA Staphylococcus Enterotoxin trong Sữa
| Manufacturer | Meizheng |
| Order No. | LR50511 |
| Analyte | Staphylococcus aureus enterotoxin |
| Sample Type | Raw milk, finished milk, and fermented milk sample. |
| Methodology | Double antibody sandwich ELISA method |
| Packaging | 96 Tests |
| Storage | T The storage temperature for the kits is 2-8℃. |
| Shelf life | The validity for this kit is 12 months |
| Lead time | Shipped within 5-12 working days. |
Introduction
Enterotoxin (SE) is a pathogenic substance that causes Staphylococcus aureus food poisoning. According to its antigenicity, it can be divided into 8 serotypes A-E and G-I, of which SEA is the most common. Enterotoxins in food are not easily inactivated during processing and can cause symptoms such as vomiting and diarrhea. In severe cases, they can cause multiple organ dysfunction and be life-threatening. This kit is a new generation of Staphylococcus aureus total enterotoxin (SET) detection product using ELISA, which can minimize operating errors and work intensity.
Principle of Test
This kit adopts double antibody sandwich ELISA method. Precoat the total amount of Staphylococcus aureus enterotoxin antibody on the microplate. Both the total amount of precoated enterotoxin antibody and detection antibody bind to the enterotoxin in the sample at the same time. And then the complex combines with the HRP-conjugate to form an antibody-enterotoxin-antibody-enzyme-HRP-conjugate, which can be colored by TMB substrate. The absorbance of the sample is positively correlated with the content of Staphylococcus aureus enterotoxin.
Parameters
Sensitivity: 0.25-1μg/kg
Limit of Detection: see the table below
| Sample | LOD (μg/kg) | ||||
| SEA | SEB | SEC | SED | SEE | |
| Raw milk, finished milk | 0.5 | 0.25 | 0.25 | 0.25 | 1 |
| Fermented milk | 1 | 0.5 | 0.5 | 0.5 | 2 |
Precision (CV %) Intra-lab assay: CV<10%
【Materials Required but Not Provided】
Devices:
—- Microwell Plate Reader (450nm/630nm)
—- Vortex
—- Constant Temperature Incubator
—- Refrigerated centrifuge
—- Balance (sensibility: 0.01g)
—- Centrifuge tube: 2mL, 5mL, 7mL, 50mL
—-Micropipette: Single channel pipet (10-100µL, 100-1000µL) Multi-channel pipet (30µL -300µL)
2. Reagent:
—- Deionized water
—- 18M concentrated sulfuric acid (H2SO4)
—- 1M sodium hydroxide (NaOH)
Kit components
| Substrate B | 6mL |
| Positive control | 3mL |
| Concentrated Wash Buffer (10×) | 40mL × 2 |
| Package insert | 1 |
| Plate cover sheet | 2 |
| Testing Report | 1 |
| Component | 96 wells |
| Antibody coated plate | 12 × 8 wells |
| SETs Antibody Solution | 12mL |
| SETs Enzyme Conjugate | 12mL |
| Substrate A | 6mL |
【Solution Preparation】
1.WashBuffer
Concentrated Wash Buffer (10×) and deionized water V: V=1:9 mix well.
2. Stop Solution
Add 10mL of 18M concentrated sulfuric acid (H2SO4) to 80mL deionized water slowly with stirring and mix well for use. The solution could be stored at room temperature for 2 months.
3. Sodium Hydroxide Solution
Prepare 10mL of 1M sodium hydroxide.
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