It's not that hard to open a hospital in another world, right?

Chapter 258 Grabbing with both hands, both hands succeed!
Gretel regretted it within half an hour.

Why did he buy so much?
How much water has entered his mind to buy a whole cart of oranges?
Obviously buying a ten catty eight catty is enough for him to make, if it is not enough, it is not impossible to sell it in the market!
And besides oranges, he also bought lemons, kale, cauliflower, cabbage, celery, peas, radishes...

"Aunt Susan! Aunt Susan!" Gretel had no choice but to apologize to the cook:

"Can you do me a favor? Peel these things, slice them, slice them, and deseed them, just treat them to the way you usually look before cooking. Not much, just a few Add it all up and handle a pound!"

"Okay, Master Gretel." The cook agreed without saying a word.Soon, there was the sound of chopping boards in the kitchen, and the sigh of the cook:

"Young man..."

Gretel shrugged.It must be admitted that the cook was much more efficient than them in doing these tasks. In the blink of an eye, a plate of sliced ​​fruits and vegetables was brought out.Gretel smiled at the cook and shouted:

"Aurora! Come here and do me a favor!"

Aurora came galloping.According to Gretel's request, he diligently threw ice spells on the lemons, kale, and cauliflower to quickly freeze them.Until all the fruits and vegetables were frozen hard, he directed Aurora to put the fruits and vegetables into a thick-walled iron bottle, and desperately pumped out the air.

As the air pressure decreases, the water in the fruit and vegetable slices begins to sublimate rapidly.Those fruits and vegetables still retain their fresh and bright colors, but they have become dry and brittle, breaking at the touch of a finger.

"Okay! Aurora, thank you! Give this to the cook to grind it into powder, mix it well, and put it in a bottle!"

Freeze-dried mixed fruit and vegetable slices!
Grinding!

Seven or eight kinds of fruits and vegetables are fully mixed!
Gretel tried to throw an identification spell, but it turned out that the information was too confusing to give feedback.Aurora also lost one, but still failed to come to a result.Not bad, I’ll take it to the Tongtian Tower tomorrow, and I’ll ask you to find a master appraiser to identify it...

Anti-scurvy potion, elementary version, done!If the appraiser can't recognize it, then it's really not possible, so I will use it to hand in the task!
With a guarantee, Grete made up his mind and began to fight with vitamin tablets.There is no need to think about chemical synthesis. Vitamins are extracted from natural products. This road can still be walked...

"Boom, boom, boom—"

Like a big rabbit, Bernard held a stone pestle that was half the height of a person, and pounded it down hard.The huge stone pestle was as light as nothing in his hand, streams of juice shot out from under the stone pestle, swirled around, and then sank to the bottom of the stone mortar.After a while, Bernard leaned the stone pestle to the side, picked up the stone mortar, and threw it out.

In the sound of gurgling water, freshly squeezed orange juice filled a pot.

extract.

Twist vigorously with gauze, filter, filter, and filter again.Get clear—or at least, clear-looking liquid.The mission of the barbarians is over here, and the next step is Gretel's own battle!
"Boss, it's all right! Is there anything else I can help you with?"

The Savage shook his orange-juice-stained hands and grinned.Gretel waved to him: "No more! Thank you for your hard work! By the way, eat less oranges these days, your hands will turn yellow!"

Then, how to make solid vitamin C...

Gretel glanced at the manuscript paper beside him.Before the hands-on experiment, he wrote down several technical routes in advance: evaporation method, cooling method, vacuum cooling method, salting out method, and reaction crystallization method.Next, let's try one by one...

Take 100ml and heat to evaporate the water.

Take the dried residue of orange juice, redissolve it, and use starch indicator and iodine solution—thanks to the fact that he made iodine when he was tossing the bacterial stain before—to measure the content of vitamin C.It's a pity that the leftovers after heating, the vitamin C content...

Too horrible to watch.

Gretel scratched his head and suddenly remembered that something like vitamin C would quickly oxidize and lose its effectiveness when heated.Well, the evaporation method is ruled out.

cooling method...

Obviously, the concentration of vitamin C in the orange juice is not enough, until it is frozen into a popsicle, there is no solid substance.

Vacuum cooling method...

The result is the same as above.

Salting out method...

Added a bunch of sodium chloride into it, and added it until the liquid was saturated, and the last thing that precipitated was table salt...

failure.

Reaction crystallization method...

The root of the reaction crystallization method is to add reactants to the solution to produce new substances.When the solubility of the new substance exceeds the saturation solubility, crystals are precipitated.So, vitamins react with something to produce insoluble substances?

钙？
Potassium?
钠？
Gretel jumped up suddenly.That's right, that's it, sodium ascorbate!It also has the effect of treating scurvy, but sodium ascorbate is a more stable compound than vitamin C!
It is also a common drug in clinical practice!

He should have remembered!
Gretel held his breath, diluted a milliliter of sodium hydroxide solution, and added drop by drop to the orange juice.Stir the glass rod in the left hand continuously, drop a drop, stir twice, and then test the pH with litmus paper.Drip again, stir again...

Gretel finally stopped when the pink of the litmus paper was almost invisible.Filter again, heat, evaporate and crystallize.Then, dissolve the crystals again and test...

failure.

Didn't make it.

Gretel continued his efforts.Anyway, the barbarian had squeezed enough orange juice, so he could toss it slowly.If sodium hydroxide doesn't work, replace it with baking soda!
Baking soda doesn't work either, just replace sodium carbonate...

Time passed by every minute and every second.Weighing, dissolution, titration, heating, crystallization.Redissolve, react, measure.Record the mass of reactants, record the reaction temperature, and record the reaction time——

One failure, another failure, another failure.From noon to night, from evening to late night.The experiment notebook was turned page after page, and the orange juice in the cauldron was also consumed cup after cup.Aurora was always by the side, helping to weigh, heat, record, and do this and that. However, as Gretel announced his failure, he gradually fell silent, and he no longer had the intention of joking.

Gretel's expression remained calm.

What is this, what is this failure?
Basic research has always been a lonely and difficult road.To produce the same product, raw materials, concentration, temperature, reaction time, catalyst, and endless ratios need to be tried.

There are tens of thousands of possibilities, and sometimes the difference is only 0.1 degrees Celsius, and it may not be done.

Even if he is just doing the simplest experiment, walking on the road that the predecessors have already stepped on, without falling over a hundred or eighty somersaults, is that still called research?
This time, the crystallization solution dropped drop by drop, and the blue solution produced by the reaction of iodine and starch faded visibly to the naked eye!

"yeah!!!"

Gretel raised his hands high and waved them vigorously.

It worked!
Sodium ascorbate-even if it is sodium ascorbate with a lot of impurities, he made it!

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