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22 Cards in this Set
- Front
- Back
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ash content |
the residue remaining after incineration represents the inorganic salts naturally occurring in the drug and adhering to it |
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total ash |
represents the inorganic salts substances present (residue remaining after incineration) |
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acid insoluble ash |
the art of the total ash which is insoluble in diluted HCl or the ash treated with 3N HCl |
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sulfated ash |
the residue are carbonized mass if treated with one ml of sulfuric acid and further incineration after evaporating the acid under the hoof |
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500-550 |
very dull heat |
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550-700 |
dull red heat |
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800-1000 |
bright red heat |
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yellow red heat |
1000-1200 |
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1200-1600 |
white heat |
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residue on ignition |
it is the determination of ash content by ignition to dull redness |
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residue on ignition |
it is performed to control the amount of inorganic matter that may be container in substances |
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acetozalamide, aspirin, cocaine |
example of residue on ignition |
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loss on ignition |
it provided a means of determining the percentage of test material which is volatilized and driven off under specified conditions |
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loss on ignition |
it is the amount of volatile matter lost when heated |
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ignite to constant weight |
ignition shall be continued at 800oC otherwise indicated until two consecutive weighs do not differ |
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dry to constant weight |
shall be continued until two consecutive weighings do not differ |
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loss on drying |
determine the amount of volatile matter |
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titrimetric method or Karl Fishcer Method, azeotropic distillation, gravimetric analysis |
methods in water content determination |
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Direct titration, residual titration, coulometric titration |
methods under titrimetric method |
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toluene, benzene, xylene |
solvents in azeotropic titration |
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for drug containing ether-soluble constituents and for drug containing no constituents |
two types in gravimetric method |
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dessicator, oven, moisture balance |
equipments used in gravimetric method |
