I want to test the mask for lead mercury, where can I go to test for it

Methods for testing ** for lead mercury:

1. Generally** are packed in plastic bags, look at the nozzle of this test tube** is sealed with tin foil, if it contains lead and mercury** is not afraid to use tin foil to seal the nozzle, because the contact time between tin foil and lead and mercury will make **black, the reason why other ** are used in plastic bags is here.

2. Pour the essence into an iron spoon and burn it with a lighter If it is black, it contains heavy metals If it is burned out of nothing, then there is no problem.

3. Everyone should know that after the purple light is turned on in a dark place, all things containing fluorescent agents will appear in purple light, and the clothes on the curtains will be revealed.

4. It can be identified with pure gold, and gold will turn silver when it touches mercury; You can also use sterling silver to wipe **, if it contains mercury, the cosmetics will turn black, and vice versa.

The easiest way is to pour the residual liquid into the spoon, and then burn the spoon with a lighter below, and after burning, I didn't find that the black thing is metal-free, I use it like this, and I was taught by others, and I experimented a lot before I found a suitable one.

The Industrial and Commercial Bureau can inspect it.

You can apply for testing at the cosmetics quality inspection center authorized by the local national quality inspection center.

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You's**? Testing institutions can test.

First of all, the texture of waterborne cosmetics is light, and the proportion of heavy metal ingredients such as lead and mercury is large, if it is added excessively, it cannot be evenly adhered in water, and it is easy to separate, precipitate and other phenomena, so water-based cosmetics will not exceed the mercury standard. The dosage forms such as ointments and creams have a thick texture and have a good protective effect on heavy metals, so consumers must pay attention to them when purchasing.

Secondly, heavy metal ingredients such as lead and mercury have poor stability in aqueous cosmetics, and are easy to oxidize with the ingredients in cosmetics, causing cosmetics to change color, and will leave black precipitate at the bottle nozzle, which also determines that aqueous cosmetics cannot add heavy metals in excess.

Thirdly, excessive heavy metals will give off a relatively strong taste, and compared with creams and creams, colorless and odorless aqueous cosmetics cannot mask this smell.

Tricks Smear on sterling silver jewelry to see scratches.

Of course, these identification methods are very accurate, but for most female friends, it is not easy to operate. Is there an easy-to-learn method to differentiate? In addition to observation, the beauty consultant who washed the spot also taught the female friend a very simple identification method, dip the appropriate amount of makeup and apply it to the jewelry of sterling silver, and scratch it on the white paper after a few minutes, if it leaves black, gray scratches, it indicates that the cosmetics contain excessive lead and mercury, the darker the color, the greater the lead mercury content.

Methods for identifying ** whether it contains lead or mercury:

1. Gold and silver identification method. It can be identified with pure gold, which will turn silver when it touches mercury; You can also use sterling silver to wipe **, if it contains mercury, the cosmetics will turn black, and vice versa.

2. Observe the outer packaging bag. Generally** are packed in plastic bags, look at the test tube** is sealed with tin foil, if it contains lead and mercury** is not afraid to use tin foil to seal the nozzle, because tin foil and lead and mercury contact for a long time will make **black, the reason why other ** are used in plastic bags is here.

3. Apply the essence of ** to the sterling silver jewelry, scratch on the white paper after a few minutes, if you leave black and gray scratches, it means that the ** contains mercury, the darker the color, the greater the mercury content.

Teach you a good method, this method is usually used by some regular manufacturers and industry and commerce when inspecting goods. If you want to know if the metal content of cosmetics is acceptable, you can bring a ring or jewelry of sterling silver. Apply it to it with the cosmetics you want to buy, and if it is a metal with a certain content, the sterling silver ring will react immediately.

Discoloration) This is why the industry and commerce do not need to bring bulky instruments when they go to inspect and can immediately check whether the product is qualified

Test strips can be bought from **.

Some cosmetics contain a certain amount of lead and mercury, but whether the content exceeds the standard, and whether the lead and mercury in skin care products exceeds the standard can be detected by heavy metal lead detection reagents and heavy metal mercury rapid test kits.

How to use: 1. Sample processing.

White sugar sample: weigh 5g sample in the "sample cup", add 20ml of distilled water or purified water, then add 2 drops of indicator A, stir to dissolve, and wait for measurement.

Vegetable and fruit samples: cut the appropriate amount of the sample with scissors, take out 5g from it and put it in the "sample cup", add 20ml of distilled water or purified water, then add 2 drops of indicator A, soak for 10min, and wait for testing.

Preserved egg sample: take an appropriate amount of shelled preserved egg protein and cut it slightly with scissors, take out 5g from it in the "sample cup", add 20ml of distilled water or purified water, then add 2 drops of indicator A, soak for 10min, and wait for testing.

2. Blank test.

Each batch of testing must make a blank control, that is, take 2ml of distilled water or purified water in the test tube, add indicator B, indicator C, and indicator D in turn, shake well, and react for 3min.

3. Sample testing.

Take the sample to be tested in the test tube, add distilled water or purified water, add indicator B, indicator C, and indicator D in turn, shake well, and react for 3min. Move into a 1 cm cuvette and put it into the instrument for detection.

The result is judged: the concentration value CS measured by the instrument is recorded, that is, the concentration of heavy metal lead contained in the sample, and the unit is mg kg.