Diazald availibility
Posted: Thu Jan 09, 2020 12:59 pm
How many of you that use diazald have been having problems with availability?
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Diazald availibility
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Re: Diazald availibility
Posted: Thu Jan 09, 2020 3:26 pm
Pretty much everyone I have spoken to for the last year has been having trouble finding it. We are actually looking into ways to switch to something else but it isn't promising.
Re: Diazald availibility
Posted: Thu Jan 09, 2020 6:13 pm
555 is an alternate method, but we don't have an instrument for it.
Luckily we don't use a lot of diazomethane so we have enough for a few more months.
Luckily we don't use a lot of diazomethane so we have enough for a few more months.
Re: Diazald availibility
Posted: Thu Jan 09, 2020 8:19 pm
We have switched from Sigma to Spectrum Chemicals due to backorders at Sigma. Their part number is 1352-M2272-25GM-EA. We have seen no problems with our 515.1 analysis. At least no NEW problems! 
Re: Diazald availibility
Posted: Thu Jan 09, 2020 10:54 pm
I remember talking to someone who wrote EPA555 and they told me not to even bother with it.555 is an alternate method, but we don't have an instrument for it.
Luckily we don't use a lot of diazomethane so we have enough for a few more months.
The sad thing is those analytes respond very well on LCMSMS but they have no method for them. I was able to see the analytes at the detection limit listed in 515.1 shooting the water straight without any extraction, it would make a very simple and clean method I think.