Testing of Food Container Packaging Materials and Contact Materials

This standard specifies the migration of arsenic in food contact materials and products after immersion in food simulants, as well as the determination of arsenic in paper products, corks, and corks using hydride atomic fluorescence spectrometry, inductively coupled plasma mass spectrometry, and inductively coupled plasma emission spectroscopy. This standard is applicable to the determination of arsenic migration in food contact materials and products, as well as arsenic in paper products and corks. 2. Paper products, cork plugs, etc. are crushed and then subjected to dry ashing digestion. Thiourea is added to the digestion solution to pre reduce pentavalent arsenic to trivalent arsenic, which then reacts with the reduced hydrogen to generate hydrogen arsenide. It is then loaded into a quartz atomizer with argon gas to decompose into atomic arsenic. Under the excitation of the emission light of an arsenic hollow cathode lamp, atomic fluorescence is generated, and its fluorescence intensity is proportional to the arsenic concentration in the measured solution, which is quantitatively compared to the standard series. Unless otherwise specified, all reagents and materials used in this method are analytical pure, and the water is Grade II water as specified in GB/T 6682. 3.1 Reagent 3.1.1 Potassium hydroxide (KOH). 3.1.2 Potassium borohydride (KBH). 3.1.3 Thiourea (CN. H, S). 3.1.4 Ascorbic acid (CH: Oa). 3.1.5 Nitric acid (HNO): premium grade pure. 3.1.6 Hydrochloric acid (HCI: superior purity). 3.1.7 Magnesium nitrate hexahydrate [Mg (NO3): · 6H: O]. 3.1.8 Magnesium oxide (MgO). 3.2 Reagent Preparation 3.2.1 Potassium Hydroxide Solution (5 g/L): Weigh 5g of potassium hydroxide and dilute with water to 1000 mI, and mix well. 3.2.2 Potassium borohydride solution (10 g/L): Weigh 10 g of potassium borohydride, dissolve it in potassium hydroxide solution (5 g/L), and bring to a constant volume of 1000 mL. The solution is prepared and used immediately

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