Then he said to the customers in the store: "I'm sorry, because no one has asked, and I didn't expect that I should have taken the initiative to send the test report to you." ”

While talking, Shao Min came over with a stack of documents and gave them to everyone one by one.

In less than a minute, there was no time to make a copy on the spot, obviously what Gu Yunnian said was true, this test report was prepared in advance, not an excuse, and I believed Gu Yunnian's words.

Looking at the test report again, the color copy, the various component determinations and results on it they don't understand, what they can understand is the identification results signed and stamped on the last page.

"The ingredients of this identified product are pure natural plants and do not contain any metals and hormones that are harmful to the human body."

There is also the last fresh chapter, the word Beijing in front of the institution, which is the most authoritative appraisal in their minds.

Seeing that everyone's expressions were even more relaxed, Gu Yunnian continued: "This test report was sent to the most authoritative testing center in the capital for identification before the products of Jinxun Pavilion were officially launched. ”

With Gu Yunnian's last words, the people present basically dispelled their last doubts and believed Gu Yunnian's words.

Of course, it doesn't matter if you don't believe it, Jinxun Pavilion is not afraid of them to test.

Gu Yunnian began to inspect his works.

"I took a look, and the skin care products brought by this Ms. Xiao are basically the same problem. Of course, more detailed testing requires more sophisticated instruments and longer time to identify the results, and I can only do a chromogenic reaction for you here to prove that there are these three components in it. ”

She pointed to the test tube rack in the center of the coffee table, "The first six columns, as you can see, were diluted by a small number of samples from the evidence that the police were about to send for examination. ”

Then he pointed to the last two columns, "The last two columns are for comparison, one column I will add lead ion solution, mercury ion solution and hormone solution respectively, and the other column is all solvent for diluting the sample." ”

Gu Yunnian took out three brown vials from the box and held them up for everyone to see.

They didn't understand the first letters, and no one knew the words lead, mercury, and hormones in the back.

After showing it to everyone, Gu Yunnian joined the seventh column of test tubes respectively.

Then he took out three more vials of reagent, "This is a chromogenic agent for lead, mercury and hormones." When it encounters the corresponding ion, it will change color. ”

Gu Yunnian first dropped the lead ion chromogenic agent into the first line of test tubes with a dropper, and there was no change in the first four test tubes.

They looked a little disappointed, but as Gu Yunnian dropped the chromogenic agent into the fifth test tube, someone immediately exclaimed excitedly: "It's changed!" ”

Suddenly, a touch of blue appeared in the test tube, like a flower slowly blooming.

The exclaimed woman saw everyone looking at her in unison, quickly covered her mouth, and smiled embarrassedly, "I have never seen such a magical scene, it seems to be a witch's magic, obviously the two kinds of water are transparent, but when they are touched together, they become such a beautiful blue." ”

It was a bright blue, like the color of a gemstone.

Gu Yunnian only smiled at her, indeed, chemical reactions are amazing for people who don't understand, and many people like chemistry because of this.

With her head down, she continued to add chromogens to the remaining three tubes, and unsurprisingly, the sixth and seventh tubes all showed color changes.