Polyether ether ketone (PEEK) is a high polymer composed of repeating units with one ketone bond and two ether bonds in the main chain structure, and is a special polymer material. It has physical and chemical properties such as high temperature resistance and chemical corrosion resistance. It is a type of semi crystalline polymer material that can be used as a high temperature resistant structural material and electrical insulation material. It can be combined with glass fiber or carbon fiber to prepare reinforcement materials. Generally, a type of polyaryletheric polymer obtained by condensation with aromatic diphenols is used. This material has a wide range of applications in the aerospace field, medical device field (as an artificial bone for repairing bone defects), and industrial field.

Fresh shrimp refers to fresh arthropods with shells on their bodies and many segments on their abdomen. There are a pair of long and short antennae on the head, and the first pair of feet on the chest is the largest, with the ends resembling pliers. They live in water and come in many types, which are edible. To detect the content of various heavy metal elements in fresh shrimp, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.

Prulan polysaccharide is an extracellular water-soluble viscous polysaccharide produced by fermentation of Aspergillus oryzae, similar to pectin and xanthan gum. It is a special microbial polysaccharide. This polysaccharide has two important characteristics: it is structurally elastic and has a relatively high solubility. Prullanic polysaccharides have strong film-forming, gas barrier, plasticity, viscosity, and excellent properties such as easy solubility in water, non-toxic and harmless, colorless and odorless. They have been widely used in fields such as medicine, food, light industry, chemical industry, and petroleum.

To detect the content of various heavy metal elements in anthocyanins, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of multiple inorganic elements in the future.

To detect the content of various heavy metal elements in methylcobalamin tablets, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.

To detect the content of various heavy metal elements in promethazine hydrochloride tablets, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.

To detect the content of heavy metal elements in different cereal crops, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.

Peanuts are divided into edible peanuts and oil peanuts. Peanut products include boiled peanuts, roasted peanuts, fried peanut kernels, salted and dried peanuts, wrapped peanuts, peanut sugar products, peanut protein powder, peanut tissue protein, and peanut butter. To detect the content of heavy metal elements in peanuts and their products, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.

To detect the content of heavy metal elements in cosmetics, microwave digestion was chosen for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.

To detect the content of various heavy metal elements in natural vitamin E soft capsules, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.

To detect the content of various metal elements in high-temperature alloys, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.

To detect the content of various heavy metal elements in petroleum coke, microwave digestion was selected for pretreatment, and suitable digestion parameters were explored. This method also has the characteristics of high recovery rate and low blank, which is conducive to the rapid and accurate determination of various inorganic elements in the future.