Food heavy metal/food parameter detection

The detection standards and principles of various heavy metal elements

1. The detection of heavy metal arsenic adopts the standards and principles

The national standard (GB/T5009.11-2003) borohydride reduction colorimetric method is used, which means that after the sample is digested, potassium iodide thiourea is added and heated to reduce pentavalent arsenic to trivalent arsenic. Under acidic conditions, potassium borohydride reduces trivalent arsenic to negative trivalent, forming hydrogen arsenide that is introduced into the absorption solution and turns yellow, After instrument detection, the arsenic content was determined to be

2. The detection of heavy metal lead follows the standards and principles

The national standard (GB/T5009.12-2003) disulfide gland colorimetric method is used, which means that after digestion of the sample, under weakly alkaline conditions, lead ions and disulfide glands form a red complex, which is dissolved in trichloromethane and determined by colorimetry

3. The detection of heavy metal chromium adopts standards and principles

After the sample is digested, the chromium ion reacts with diphenylcarbazide in the presence of divalent manganese to generate a purple red complex. The color of the complex is proportional to the content of hexavalent chromium, and the chromium content can be determined by colorimetric measurement

4. The detection of heavy metal cadmium adopts standards and principles

The national standard (GB/T5009.15-2003) colorimetric method is used, that is, after the sample is digested, Under alkaline conditions, cadmium ions form a red complex with 6-bromophenyl thiazolylazo naphthol, which is dissolved in chloroform for colorimetric determination

5. The detection of heavy metal mercury adopts standards and principles

The national standard (GB/T5009.17-2003) dithizone colorimetric method is used, that is, after digestion of the sample, under acidic conditions, mercury ions form an orange red complex with dithizone, which is dissolved in chloroform for colorimetric determination

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