Melzers reagent : storage

Melzers reagent : storage

Postby Leif Goodwin » Thu Aug 12, 2010 8:45 pm

Could someone please tell me if Melzers reagent keeps well, and if so, how long. I will buy some, and there is no point paying for 100ml if it does not keep well. Thanks.
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Re: Melzers reagent : storage

Postby Richard Scott » Fri Aug 13, 2010 2:22 pm

I have had my bottles for about 6 months and there seems to be no deterioration in that time. Richard.
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Re: Melzers reagent : storage

Postby Leif Goodwin » Fri Aug 13, 2010 2:29 pm

Richard Scott wrote:I have had my bottles for about 6 months and there seems to be no deterioration in that time. Richard.


Thanks. I'll get the bigger bottle then.
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Re: Melzers reagent : storage

Postby Andreas Gminder » Tue Oct 26, 2010 12:08 am

Hello,

a little bit late, well, but may be someone tracks this thread with the same questions later on:
Melzers reagent is stable and can be stored for years.
There is no need to keep the iod-iodkaliumiodide and the chloral hydrate seperately.

best regards,
Andreas
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Re: Melzers reagent : storage

Postby Leif Goodwin » Tue Oct 26, 2010 9:02 am

Andreas Gminder wrote:Hello,

a little bit late, well, but may be someone tracks this thread with the same questions later on:
Melzers reagent is stable and can be stored for years.
There is no need to keep the iod-iodkaliumiodide and the chloral hydrate seperately.

best regards,
Andreas


Thanks. That's useful to know.
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Re: Melzers reagent : storage

Postby Neil » Tue Oct 26, 2010 9:02 pm

Probably even more useful to know is the fact I am still using the same solution of Melzers I purchased at a BMS discomycete workshop in April 2002 - and it still turns asci tips blue. (Just used some half an hour ago)

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Re: Melzers reagent : storage

Postby Leif Goodwin » Tue Oct 26, 2010 11:22 pm

Neil wrote:Probably even more useful to know is the fact I am still using the same solution of Melzers I purchased at a BMS discomycete workshop in April 2002 - and it still turns asci tips blue. (Just used some half an hour ago)

Neil.


Are you expecting a prize for the oldest Melzers solution? I bought a cake on sunday, but I've eaten it.

As an aside, I have some methylene blue which is about 15 years old and it has gone off. I guess I deserved the cake.
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Re: Melzers reagent : storage

Postby Neil » Thu Oct 28, 2010 11:59 pm

My apologies Leif, I must have read your opening post wrong.
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Re: Melzers reagent : storage

Postby Leif Goodwin » Fri Oct 29, 2010 11:50 am

Neil wrote:My apologies Leif, I must have read your opening post wrong.


Neil, I was being light hearted, though obviously that was not clear. Your post was helpful. Thanks. On a related issue, Congo red seems to keep for quite a few weeks if not months when mixed up with 10% ammonia solution.
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Re: Melzers reagent : storage

Postby Neil » Fri Oct 29, 2010 9:11 pm

Leif Goodwin wrote:
Neil wrote:My apologies Leif, I must have read your opening post wrong.


Neil, I was being light hearted, though obviously that was not clear. Your post was helpful. Thanks. On a related issue, Congo red seems to keep for quite a few weeks if not months when mixed up with 10% ammonia solution.



Phew, that's a relief - I thought it was my "Et tu, Brutus'' ? moment. :D

I'm told that where you have ammonia added to congo red, instead of water, after a while it begins to go into microscopic lumps and then all you need to do is just add some more ammonia and the solution is as good as new again, but when this happened to me I just replaced it with a fresh batch.
I remember Andreas gave out some very useful information about congo red a few years ago on another forum.

Neil.
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