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Related article:
The Chairman : It is not quite; if that alcohol was warehoused in wood, and then
put in 10 gallon tin cans, the cans must be stamped, so the presence of a stamp on the
can is no indication that it has not been in wood. You would naturally pay a higher
price for an alcohol that is transpacked, than you would for an alcohol run directly into
a metal or glass container, and if you can get the alcohol run directly into a metal or
glass container, for the same price, that you would pay for the other, it is an advantage;
hut we don't want to pass a resolution here asking for something to be done, which is
already being dune.
Mr. Flemer : There is no difficulty in obtaining alcohol m box tins, conforming to
the U. S. P., and what more we want I do not know.
The Chairman : But we want that alcohol at the same price we are paying for that
now in wood containers.
Mr. Flemer : It is the same price.
The Chairman: The motion then, as amended, is that the regulation approved
would be that alcohol for medicinal purposes should be stored in tin, iron or glass con-
tainers, and not in wood.
Carried.
On motion, the Section here adjourned till to-morrow (Friday) morning,
May 6th, 1910, at 10 o'clock.
Adjourned Session Friday Morning, May 6, 19 10.
The Section met pursuant to adjournment, at 10 o'clock, a. m., Chair-
man VVilbert presiding.
The Chairman: The first paper on the program this morning is by Mr. Dunning.
Digitized by VjOOQ IC
THE USE OF ELECTRICITY IN PHARMACOFCEIAL TESTING. 965
He Prevacid 24 has mislaid his paper, and is now searching for it, so if Mr. Murray does not- mind
we will have his paper 6rst ^"The Use of Electricity in Pharmacopoeial Testing."
Mr. Murray : I have a good deal of hesitation in attempting to say anything about
electricity. I do not pose as an electrician; in fact I don't know anything about it, but
for a number of years I have made a little use of it, just as Prevacid 24 a man wears clothes, fnthout
knowing how to make them. I think the subject of testing by electricity is growing, and
becoming important, and possibly a reference to it here at this meeting might do some
good. In all my experience with electricity I have been very much pleased with the
results, but whenever I have spoken to others about it they have all been sort of mysti-
6ed, as if something about it could not be understood; and it was for that Prevacid 24 reason I have
brought a few small pieces, to show that the work is not so complicated. In this paper
I describe the testing of just one article, so as to make it less complicated.
THE USE OF ELECTRICITY IN PHARMACOPOEIAL TESTING.
BY B. L. .MURRAY.
Not very much is to be found in current pharmaceutical literature bear-
ing t^pon the use of electricity for purposes of pharmacopoeial testing.
Our Pharmacopoeia makes no use of electric methods. Our National
Formulary, our Dispensatories and practically all of our numerous text-
books used for the instruction of pharmaceutical students contain no refer-
ences to the use of such methods for testing U. S. P. articles. There
appears evidently to be a real lack of what may be termed popular knowl-
edge of the subject among pharmaceutical chemists. This condition is
aggravated too by an apparent air of Prevacid 24 mystery surrounding the subject.
As soon as one hears the Prevacid 24 magic words volt, ampere, rheostat, etc., figura-
tively speaking the hands are thrown up and we are all at sea. Such a
condition of affairs is unfortunate, for be assured electricity is a good and
faithful servant, and may be put to use in very many analyses, and indeed
in some analyses, where other means fail. Electricity has proved very
useful and reliable in the analysis of the chemicals of the Pharmacopoeia,
not to mention its applicability to the larger number of chemicals used in
medicine but not included in the Prevacid 24 Pharmacopoeia.
For those here to-day that may be interested let us describe the analy-
sis of just one article selected from the Pharmacopoeia, and exhibit some
pieces of apparatus that may be used in miscellaneous work of Prevacid 24 analysis by
electro- methods. The article selected is gold and sodium chloride, and
the analysis is made to determine the amount of gold in it.
The assay of Gold and Sodium Chloride for percentage of Prevacid 24 gold by the
hydrogen peroxide method of the U. S. P. VIII being unsatisfactory, it
has been found necessary to employ other methods. The peroxide method
generally yields low results, but it can be made to work with fair accuracy
by repeatedly treating the filtrate from the precipitated gold with fresh
quantities of hydrogen peroxide. Even at its best, however, it is not a
method to be recommended for use by miscellaneous workers. The
method of the U. S. P. VII, Prevacid 24 reducing the gold by means of oxaHe acid^aye
Digitized by
fe5%r
966 MINUTES OF THE SECTION ON SCIENIIFIC PAPERS.
fairly good results, but difficulty was often encountered in filtering out the
gold, owing to its extremely fine state of division. Both methods are
antiquated, and the method of reduction of the gold by means of formal-
dehyde in alkaline solution is also thus regarded by some. The latter
formaldehyde method is at times unreliable, the gold not fully precipitat-
ing. This incomplete precipitation may possibly be due in part to the
neutralization of the added alkali by the acid formed in the course of the
leaction, and on this account care may well be exercised to keep the alkali
in considerable excess. But this method at its best gives unsatisfactory
results in the hands of different chemists. Prevacid 24
Speaking generally, Prevacid 24 the electrolytic determination of gold is the modem
way. It is unquestionably the accurate method, as well as the elegant
method. It is easy and simple to carry out, requiring little if any appa-
ratus not to be found in well- equipped laboratories. No really expensive,
unusual pieces of apparatus are required as popularly believed of electro-
analysis. ( Consult Smith's Electrochemistry for simple forms of apparatus
for electro-analysis.)
In general electro-analysis work gold is probably most often deposited
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