"Suspected opioids to be examined, aloe vera, licorice, jujube paste, ......" Gao Yi glanced at the screen, the hand in the lens seemed too abrupt, and he adjusted the angle of the camera.

"Opioids to be picked up, aloe vera, licorice, jujube paste," his fingertips once again ran over the four solvents on the test tube rack, stopping in front of the last test tube and lightly tapping a few times, "Standard mixture - here we have only selected five main components, and the configuration ratio is also approximate, because the content of each component varies greatly from different origins-" After a slight pause, he turned his face to the camera that took a close-up view, and continued: "It should be noted that the configuration of the reference solution must be strictly in accordance with the specifications, Generally, the weighing volume should not be less than 10 milligrams, so although only 1 to 2 milliliters of standard solution will be used in this experiment, at least 10 milliliters should be used at a time. ”

Gao Yi said as he adjusted the camera that captured the details back to its original position.

The entire filming environment consisted of two mobile phones and a laptop. The mobile phone is lined with a napkin with a clip and fixed on a universal light stand for fishing, suspended directly above the experimental table, and the entire experimental details are taken from a top perspective. The fishing light stand has a hose-type cantilever that is easy to adjust and can be extended over long distances, making it much more free to use than the selfie stick and tripod combination he used before.

The other mobile phone was simply fixed directly on the iron frame with a flask clamp and placed in a corner of the laboratory table to shoot a close-up half of the body from the side front. The notebook is used for shooting panoramas, resting on the filing cabinet in the other direction, with several books underneath to increase the height, and a 45-degree angle with the highest appearance, which puts most of the laboratory into the lens from the side.

"That's all we have to do," Gao Yi continued, "but before the experiment, let's do a little test ...... first," he said, he took a 6-hole white porcelain reaction plate and placed it under the lens, adjusted the picture slightly, and then took a drop of the liquid to be tested and a drop of the standard solution on it.

"Let's look at the color change chemically," he says, taking a flask of concentrated sulfuric acid and dropping two drops on the panel, then lowering the height of the camera so that the panel can fill the entire frame to capture details.

"We added concentrated sulfuric acid. After the reaction, the standard mixture is pale purplish red, which is not very obvious, but it is still within the scope of recognition by the naked eye. However, there is no change in the color of the object to be examined. Therefore, it can be roughly assumed that the main component of the object to be examined is not opioid......" He said, turning his face to the close-up camera and showing a smile, "Do you feel like doing exercises in high school, peeking at the standard answers and then going back to answer them?" ”

The lens was recalibrated to a height that would not hinder hand movements, and Gao Yi also did a few movements that simulated the subsequent experimental steps.

"Alright, let's start the official experiment."

"Mechanism 254 Fluorescent Silicone Rigid Board." Gao Yi took out a piece of GF254 from the dryer and shook it under the lens, then put it back again, and then moved the two vertical chromatography cylinders containing the developing agent to the lens and displayed them in turn, "The developing agent, benzene, methanol, acetone, concentrated ammonia, the ratio is 15:5:3:5; Developing agent, ethyl acetate, methanol, concentrated ammonia, ratio 17:2:1. Note that the unfolding cylinder must be pre-saturated. ”

He then placed the two cylinders, a rack of five tubes, a box of capillaries, and a miniature hair dryer in the right position, and familiarized himself with the distance. Finally, a pencil and a ruler are slipped into the frame.

Gao Yi stopped and slowed down a little, adjusted the rhythm, and then, took the plate, scribed, punctuated, pumped the capillary, took the liquid, spotted, changed the capillary, took the liquid, spotted, and changed the capillary...... At the end of the 5th spotting, the hair dryer is hot air, count to 5, and place it in the chromatography cylinder; Then, the plate was taken again, marked, spotted, blow-dried, and placed into another chromatography tank.

After everything was done, Gao Yi pulled the mobile phone that captured the details and watched the playback, and the effect was not bad.

At this point, all the experimental steps are complete! Now it's time to wait for the results of the expansion. "Because of the colorless component, we can see the end result with a 254-nanometer UV lamp." Of course, a chromogenic agent can also be used, and the chromogenic agent is potassium bismuth iodide. ”

"Our experiment today is relatively simple, very normal, the first technical class, from the lowest L-level to choose the case, the selection is naturally the easiest. But doesn't that mean that these simple cases are completely undifficult? Not necessarily, although there is no technical requirement, but there is a certain ability to grasp the time.

L-level case, the standard time is 25 minutes, that is, if you only do L-class, you have to do 15 a day, which is still calculated based on 6 hours of effective work a day——"

Speaking of this, Gao Yi smiled harmlessly at the camera.

"Isn't it very humane to set aside 2 hours a day for everyone to fart and chat, swipe WeChat, watch the news, and make porridge on the phone? So, don't complain to me in the future, say anything, boss Gao, why are you pressing your time so tight, the workload is too much, etc.

In fact, I have been emphasizing to you to arrange your time reasonably, go to work every day, don't start working hard when you get the case, and be willing to spend a little time to arrange a work plan for all the cases of the day, and alternate them, so that you will find that the original tight time is actually abundant.

For example, in today's case, it takes 2 hours to soak in HAC alone, and 1 hour to extract chloroform and isopropanol. Some might say, how do you do it in 25 minutes? At least 3 hours is enough.

Then do I still have to open an A-class case for you? Keep in mind that you are all $1.8 per minute, or 24-hour clock, which translates to $5.4 per minute, and at the current exchange rate, 25 minutes is equivalent to a thousand dollars less. ”

How many dollars per minute refers to the cost of the laboratory after it is allocated to the capita, including equipment depreciation, rent, energy, consumables, manpower, etc., that is, how much money is consumed per person per minute. This stalk was inherited from Gao Yi from his mentor during the intern era. As for $1.8, it can't be the real value, and at his inter time, the figure was only 0.18. However, it was the mid-90s, and without four rounds of QE and four trillion, both US dollars and RMB were more valuable.

After Gao Yi heard this stalk, he silently calculated that according to the black market exchange rate of 1 to 10 at that time, he found that he was already a rich man with an annual consumption of nearly one million. As a result, when he went back that night and walked on the road, he ran all over the street looking for tigers, and he couldn't see any dukes, crowns, etc., as for the prince's car, which had been envied before, not to mention, it was 2 roulette, so good!

After a small divergence of thoughts, he quickly took it back, and Gao Yi continued: "How to do it in 25 minutes? Actually, before I did the preparations, I already mentioned to you that you can pick up the sample after you make the card and put the bag, and then you don't care, soak it and let it shake, so that it can be used to deal with other cases all morning. Then before lunch, just prepare for centrifugation, set the time, and come back after eating to get the supernatant. Then adjust the PH value to extract, and wait until afternoon tea before centrifugal sampling. Afternoon tea is drunk, the sample is expanded, and the analysis results are filled in and the report is written before getting off work. ”

"Do you want 25 minutes? Absolutely not. How much time depends on the hands and feet, if the hands are fast......" He shook his watch at the close-up lens, and then raised his fingers and flicked the surface: "6 minutes, verified." "Although it is only a small screen of the mobile phone, and it is separated by a distance, the golden case and the blue chronograph seconds hand still look very eye-catching.

Gao Yi wears a Panerai PAM 525, a wedding token for his wife. He didn't feel much about this brand, and when he chose the watch, he only remembered that the acting girl was amazing, and another limited edition PAM 726 was also very sassy. It's a pity that the sister is my wife's best friend, 726 is too cheap, the price is half lower than 525, and it is titanium alloy, which does not match the positioning of the dowry in my wife's mind. So there was an extra piece of gold on his wrist, which made people suddenly Trump, just like the so-called color but knows the local tyrant gold, and the dress only knows Armani.

"That's all we have to say about the experimental part of this case." Gao Yi continued, "Next, we will analyze the experimental results first, and then the most important part is the error correction part. Like I said at the beginning, we have a total of 16 classes, from L level to 4S level, each class level 1, and each level will be selected from the case in question.

But before we move on to the next step, let's take a break. It's not that you're afraid that you'll get tired of listening to my class — but because it's a video lesson, there's no need to sit upright and have a cup of coffee to refresh yourself before continuing. ”

"Okay, then let's pause and see you later." Gao Yi quit the video of the two mobile phones, but kept the notebook and continued to shoot.