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The bottom of the plastic vials has a triangle with an arrow. The triangle has a number. The numbers in the triangles below the plastic vials refer to the composition of the vials and the effect of the ingredient on human health.
1——PET polyethylene terephthalate
Common in mineral water vials, 2ml screw hplc vials carbonated beverage vials, etc. When the temperature reaches 70 ° C, it is easily deformed, and there is a substance harmful to the human body. After 10 months of use of plastics No. 1, the carcinogen DEHP may be released. These vials cannot be placed in the car to basking in the sun, and cannot contain alcohol, oil, etc.
2——HDPE high density polyethylene
Common in white medicine vialss, cleaning products, bath products. Do not use it as a water cup, or as a storage container for other items.
3——PVC polyvinyl chloride
Common in raincoats, building materials, plastic film, plastic boxes, etc. Excellent plasticity and low price, so it is very common to use. It can reach the apex when it is heat resistant to 81 °C. It is easy to produce harmful substances at high temperature and is rarely used in food packaging. Difficult to clean, easy to residue, do not recycle.
Common in plastic wrap, plastic film, etc. When high temperature, harmful substances are produced. When toxic substances enter the human body with food, they may cause diseases such as breast cancer and birth defects.
Commonly used in soy milk vials, yogurt vials, 2ml screw hplc vials microwave lunch boxes, melting point up to 167 ° C, is the only plastic products that can be placed in the microwave oven, can be reused after careful cleaning. It should be noted that some microwave oven lunch boxes are made of No. 5 PP, but the cover is made of No. 1 PET. Since PET cannot withstand high temperatures, it cannot be placed in the microwave oven together with the box.
Common in bowls of instant noodles, fast food boxes. Do not put in a microwave oven to avoid the release of harmful chemicals due to excessive temperature. Avoid using hot food boxes to pack hot foods. Don't use microwave ovens to cook instant noodles.
Common in kettles, space cups, and vials. Department stores often use water cups of these materials as gifts. However, this material cup is easy to release the toxic substance bisphenol A, which is harmful to the human body. In addition, do not heat when using this cup, 2ml screw hplc vials do not expose to the sun.
This is the end of the introduction of A brief analysis of the figures at the bottom of the HPLC vials of the sample vials expert. I hope it can help you.