Good day steemians, Thanks for taking your time for reading through my previous post and this is a continuation of the previous post. Storing of solvent or chemicals in the laboratory is very important and before the preparation of chemicals or solvents, Ones must understand the procedure and precaution of the practicals.
The solvent or chemicals to be stored together must have similar or close behaviour otherwise stored separately in other not to cause an explosion in the laboratory and oxidizing substance must be properly stored far away from flammable materials and materials that are good reducing agents.
So, this brings about some questions, What are the general precautions on use of the chemical in the laboratory?, What are the effects of wrong handling of chemicals? and What system removes toxins from the body?.
GENERAL NOTE ON THE USE OF CHEMICAL LABORATORY.
1.Benches must be kept clean and clear of bottles and apparatus, not in immediate use. Accumulation of objects leads to accidents. Bottles containing inflammable or otherwise dangerous chemicals should never be left on the bench.
2.Solution spilled on the bench or floor should be wiped up immediately. Strong acids should be neutralized by sodium or ammonium carbonate. Caustic alkali solution should be treated with ammonium chloride and plenty of water.
3.Dirty apparatus should not be left in or near sinks. It is particularly dangerous to leave bottles or apparatus containing corrosive substances such as sulphuric acid, nitric acid, alkalis and phenols near the skin. Do not leave residues on stands, clamps, ring stands, etc.
4.Boke glass, porcelain, and other solid waste materials should be placed in waste boxes or buckets, and not and never in sand or fire buckets. They should not be around longer than necessary.
5.Bottles must be returned to the shelf after use.
6.A test-tube you are heating must not be pointed at any person in the neighbourhood. Do not look into the mouth of a test-tube or flask whilst mixing or heating the contents.
7.All services (gas, water, aid, vacuum) must be turned off when not in use.
8.When pouring concentrated acid solutions down the sink, wash them away with a large volume of water to dilute the acid in the traps and settling pots.
9.Never make mixtures of an ingredient without full instruction from a textbook or demonstrator.
10.Stoppers or bottles should seldom be laid down because of the great danger of contamination but should be held between the third and fourth fingers. When it is necessary to lay down, place it on the cleaned glazed surface.
11.Spatulas should not be brought into contact with liquid reagents; this may lead to contamination. Always use a glass stirring rod.
12.Always transfer solids from reagent bottles using a clean dry spatula.
13.Bottles and other containers used for sampling must carry a clear indication of their contents.
14.Take care when handling crushed ice. Broken glass cannot be seen in the ice and can cause serious injury.
15.Do not store corrosive liquids, e.g. cleaning mixtures, in lockers.
16.Experiment in progress should not be left unattended without first seeking the approval of the demonstrator, or member of the staff in charge, and notifying the laboratory technologist.
17.Ensure that hands are quite clean before leaving the laboratory.
What are the effects of wrong handling of chemicals?
The effects of wrong handling of chemicals in the laboratory can cause series of injury or accidents because the wrong handling of chemicals can still lead to health effects, examples are burns or poisoning. Effects of chemicals human health can also cause long-term effect from chemicals, it might be exposed to particular solvents or chemicals for a very long of the time.
What system removes toxins from the body?
The blood sample of effect body has to be collected and transport to medical Laboratory to diagnose, examined and the result must be provided to know exact drug or treatment to used to detoxify the toxin present in the body through the blood sample. This was done by eliminating the impurities to purities from the blood in the kidney, liver, intestines, lungs, skin, lymphatic system and other parts of the body.
Conclusion: Benches must be kept clean and clear of bottles and apparatus, but not in immediate use. Accumulation of objects leads to accidents. Bottles containing inflammable or otherwise dangerous chemicals should never be left on the work-bench and Solution spilled on the bench or floor should be wiped up immediately.
Finally, It is particularly dangerous to leave bottles or apparatus containing corrosive substances such as sulphuric acid, nitric acid, alkalis and phenols near the skin.
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