Determination of Total Nitrogen in Nitrogenous Fertilizer
Under the action of the catalyst, the nitrogen fertilizer is decomposed by heating with concentrated sulfuric acid to convert all nitrogen into ammonium sulfate (NH4) 2SO4, and then the solution or part of the solution is distilled under alkaline conditions to absorb ammonia in the boric acid solution Titrate it with standard acid.
Nail grooming is an important part of women's beauty. Women who love beauty always paint their long nails with bright red nail polish. To show the charm of delicate hands. But before you beautify your nails, you should touch them up. The first is to remove the old nail polish. Dip a cotton cloth in nail polish remover and rub vigorously from the bottom of the nail to the tip several times to remove thoroughly. This can also allow the old nail polish to soak into the skin or surrounding tissues. Then use a manicure tool to trim the shape of your nails. When finished, dip your hands in soapy water to loosen the skin. Then carefully wipe your fingers and fingers with a towel, and slowly press your fingers so that your skin is close to your nails. If necessary, use cuticle clippers and tweezers to remove the insides and uneven dead skin at the root of the nail.
Base your nails before painting them. In addition to using oil or cream around the nails and at the base, apply a protective layer to the nails. Shake the nail polish before painting to make the color inside the bottle even.
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