Gelatin digestion specialized high-throughput microwave digestion instrumentMain features:

1. Intelligent microwave chemistry work platform, which can be used with different types of digestion tanks to achieve different application functions, equipped with 20 high flux rotors and digestion tanks

2. A special stainless steel microwave resonant cavity with a body of diamond and thickened and reinforced design, with a volume of 66L. The inner cavity is sprayed with up to 5 layers of PFA (modified polytetrafluoroethylene) to prevent long-term corrosion from strong acids

3. Double magnetron misalignment and harmonic arrangement design to ensure uniform microwave inside the furnace cavity

4. Dual measurement and control of temperature and pressure; Full tank infrared temperature measurement and full tank pressure monitoring ensure experimental uniformity

5. Real time control and display of temperature, heating time, constant temperature time, power, temperature, and time curves on the LCD screen, making it clear at a glance; Built in application methods. Users can simply call it

6. It can be applied to microwave experiments that require high-precision control of reaction processes, such as ultra-high pressure sealed microwave digestion, high-throughput sealed microwave digestion, sealed organic solvent extraction, and sealed organic synthesis.

Background of the event: On March 15th, CCTV News once again exposed that multiple gelatin manufacturers were using problematic skin materials to make edible gelatin and medicinal gelatin. Food quality issues have once again become the center of public opinion in society, involving well-known enterprises such as Crayon Shin chan, Golden Crown, and Yake. The related products have been taken down and sealed off in advance. This incident involves many children's foods such as sugar, jelly, gummy candies, old yogurt, etc. Providing testing equipment for food and pharmaceutical production enterprises is our unshirkable responsibility as suppliers of analytical and laboratory instruments, while working together to ensure the quality and safety of our products.

1、 Sample pre-treatment

According to the Chinese Pharmacopoeia, microwave digestion analyzer is an essential pre-treatment equipment for the detection of gelatin and hollow capsules.

Precautions for selecting microwave digestion equipment: 1. Batch processing quantity: The price of microwave digestion equipment varies greatly depending on the number of samples processed at the same time. The appropriate microwave digestion equipment should be selected according to the different daily sample quantities tested by the enterprise. Generally, there are 40 samples per batch, 20 samples per batch, 12 samples per batch, 8 samples per batch, and 6 samples per batch.

2. Pressure resistance of digestion tank: Referring to the digestion method of gelatin and hollow capsules in the 2010 Pharmacopoeia, a sample size of 0.5g of gelatin needs to be put into a polytetrafluoroethylene digestion tank for digestion. 0.5g of gelatin is a great challenge for general microwave digestion because the digestion tank capacity used by general microwave digestion instruments is 60-70ml (small capacity). During the digestion process, due to the production of a large amount of yellow smoke and the explosion of the tank, a large capacity (100ml or more) and high pressure resistance (10MPa) must be used to ensure the safe digestion of 0.5g of gelatin.

2、 Heavy metal analysis and detection instruments

The heavy metal analysis and detection instrument is an atomic absorption spectrophotometer, which has three types of atomizers: flame, graphite furnace, and hydride generator.

Flame Atomizer: Mainly used for measuring elements such as copper, iron, zinc, etc

Graphite furnace atomizer: mainly used for measuring elements such as cadmium, chromium, lead, etc

Hydrogen generator: mainly used for measuring elements such as mercury, arsenic, lead, selenium, tin, tellurium, antimony, germanium, etc

3、 The reference method is as follows:

Take 0.5g of the sample and place it in a polytetrafluoroethylene digestion tank. Add 5-10ml of nitric acid, mix well, soak in the solution, cover the inner lid, tighten the outer sleeve, and place it in a suitable APL Ople microwave digestion analyzer for digestion (according to the instrument's prescribed procedure as follows:).

Step temperature rise time maintenance time power

*Step: 120 ℃ 5 minutes 5 minutes 60%

Part 2: 150 ℃ 6 minutes 25 minutes 50%

After complete digestion, remove the dissolution tank and place it on an APL acid remover to slowly heat until the reddish brown vapor evaporates and is almost dry. Transfer 2% nitric acid into a 25ml volumetric flask and dilute to the mark. Shake well to obtain. Simultaneously prepare reagent blank solution using the same method; Take another chromium single element standard solution and dilute it with 2% nitric acid to prepare a chromium standard stock solution containing 1.0 μ g of chromium per 1ml. Before use, accurately measure an appropriate amount of chromium standard stock solution and dilute it with 2% nitric acid solution to prepare a reference solution containing 0-80ng of chromium per 1ml. Take the test solution and the reference solution, use a graphite furnace as an atomizer, and determine the chromium content using atomic absorption spectrophotometry (Appendix IVD * method) at 357.9nm. The chromium content should not exceed 2 parts per million.