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add drops of nitric acid solution and check for turbidity. provided sample remains clear, add drops of % silver nitrate solution. stopper and invert the tube to mix and observe if any turbidity is formed. to do this, compare the turbidity of the sample with the standard by looking down through the liquid...
{ "id": " ", "result": " villa des orangers one of marrakech's top places to stay in; an impressive location in one of the small lanes on the southern corner of the jamâa el fnaâ square, with a sumptuous collection of rooms and suites overlooking courtyards filled with orange trees and fountains and...
barrier protection .......................................................................................................... d. face shields intended for a medical purpose .................................................................. e. surgical masks intended to provide liquid barrier protection...
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