Chemical News and Journal of Physical Science, Tom 83Chemical news office., 1901 |
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Strona 68
... present in little more than traces , that knowledge alone may suffice , for it is often more im- portant to know whether or not an element is present than to be able to say that it is there in amount of exactly 0'02 or о'oб per cent ...
... present in little more than traces , that knowledge alone may suffice , for it is often more im- portant to know whether or not an element is present than to be able to say that it is there in amount of exactly 0'02 or о'oб per cent ...
Strona 234
... present exceeds 10 or 20 milligrms . , it is advisable at this point , though not absolutely essential to the attainment of fairly correct results , to decant the liquid from the residue , wash the latter a little with anhydrous amyl ...
... present exceeds 10 or 20 milligrms . , it is advisable at this point , though not absolutely essential to the attainment of fairly correct results , to decant the liquid from the residue , wash the latter a little with anhydrous amyl ...
Strona 247
... present , by any ferric salts that may have been dissolved . The sulphur of sulphides may sometimes be correctly determined by extraction with aqua regia or some other powerful oxidiser , but not always ; so that it is better by far to ...
... present , by any ferric salts that may have been dissolved . The sulphur of sulphides may sometimes be correctly determined by extraction with aqua regia or some other powerful oxidiser , but not always ; so that it is better by far to ...
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