Health food testing items testing

This standard specifies the method for determining the activity of superoxide dismutase (SOD) in food. This standard is applicable to the determination of superoxide dismutase (SOD) activity in various types of food. The detection limit of the first method in this method is 1.17 U/mL; The detection limit of the second method is 0.033 U/mL. The amount of SOD required to inhibit the autooxidation rate of pyrogallol by 50% at 25 ℃ is defined as one activity unit. Under alkaline conditions, pyrogallol undergoes self oxidation, and SOD activity can be measured based on the ability of SOD to inhibit pyrogallol self oxidation. 4 Reagent 4.1A solution: pH 8.20 0.1 mol/L Tris hydrochloric acid buffer solution (containing 1 mmol/L EDTA · 2Na). Weigh 1.211 4 g Tris and 37.2 mg EDTA · 2Na and dissolve them in 62.4 mL In a 1 mol/L hydrochloric acid solution, dilute to 1oo mL with distilled water. 4.2B solution: 4.5 mmol/L. pyrogallol hydrochloride solution. Weigh 56.7 mg of pyrogallol (A.R) and dissolve it in a small amount of 10 mmol/L hydrochloric acid solution, and dilute to 100 mL. 4.31 mmol/L hydrochloric acid solution. 4.40.200 mg/mL superoxide dismutase< SOD). 4.5 Distilled water: Double quartz distilled water. 5 screen 5.1 UV visible spectrophotometer. 5.2 Precision pH meter with an accuracy of 0.01pH. 5.3 Centrifuge. 5.410 mL colorimetric tube. 5.510 mL centrifuge tube. 5.6 Glass bowl

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

BAIJIAN testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Our Competitive Edge:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China