I have an ez test that is about two years old. I have not gotten any quick or instant-fizzy reactions in quite a while. I feel like the beans are not as potent ( rolls have not been as intense). I have kept the tester in the freezer almost constantly. Anyone notice slower reactions with older test kits?
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RT&DC Moderators: Senior Staff
age of ez test effect reaction time?
- Thread starter sman
- Start date
Chemical Generation
Bluelighter
The age of your kit will certainly affect both the time, but more importantly the accuracy of your tester. You should consider replacing your Marquis Reagent tester about every 6 months or so.
Check our our website FAQs for more information. www.chemicalgeneration.com.au
B.
Chemical Geenration
Check our our website FAQs for more information. www.chemicalgeneration.com.au
B.
Chemical Geenration
johnboy
Bluelight Crew
EZ Test says their tester will test 300 pills. This is an indication of how much fluid there is, not how long that liquid will last.
Chemical Generation is about the only company thats says the tests have a shelf life. This doesnt meant their product is in any way infeior, it is (practically) identical. it just means they are the only ones to say that you should get a new kits every 6 months or so, which sounds reasonable to me.
Chemical Generation is about the only company thats says the tests have a shelf life. This doesnt meant their product is in any way infeior, it is (practically) identical. it just means they are the only ones to say that you should get a new kits every 6 months or so, which sounds reasonable to me.
6 months sounds about right. it's short, but there's nothing you can do about it except store it tightly sealed somewhere cool, dark and dry.
there are extremely harsh conditions inside that bottle; all kinds of things could be happening. most likely the formaldehyde is getting oxidized (although in the kits that have methanol, i don't know; maybe it's getting reduced too). it also may polymerize into paraformaldehyde, which would form a white precipitate.
although it's somewhat unwise to provide such a large amount of product when the shelf life is so short, there's really no way around it; it has to be in a glass bottle (which should be amber; i don't know if they are or not). the reagent is toxic and environmentally unfriendly and i dont think most people can dispose of it properly.
there are extremely harsh conditions inside that bottle; all kinds of things could be happening. most likely the formaldehyde is getting oxidized (although in the kits that have methanol, i don't know; maybe it's getting reduced too). it also may polymerize into paraformaldehyde, which would form a white precipitate.
although it's somewhat unwise to provide such a large amount of product when the shelf life is so short, there's really no way around it; it has to be in a glass bottle (which should be amber; i don't know if they are or not). the reagent is toxic and environmentally unfriendly and i dont think most people can dispose of it properly.
F
freeohfree
Guest
don't keep your kit in the freezer!
we live in a climate that drops to -40oC in the winter. we found out the hard way and lost a bunch of kits to the cold when the kits were left in a car overnight.
best bet, as said, cool and dark (not freezing)
and yes, the kits do die with age. the amount of time fluxates though, depending on how it has been stored. i believe what happens is the formaldehyde slowly gets eaten by the sulphuric acid.
also, i'd like to hear other peoples reports of what happens when their kits have expired. i've heard one person say it gives false positives, but i don't believe this. any comments?
i think it would be very prudent of testing kit makers to put the expiry signs in the instructions.
on an unrelated note, i think that black should be removed from the test result instructions for a positive MDxM result. in every pill i have tested, the result may appear black at first, but under a bright light and when the plate is tipped (so the solution spreads thinly) the result is always dark purple.
we live in a climate that drops to -40oC in the winter. we found out the hard way and lost a bunch of kits to the cold when the kits were left in a car overnight.
best bet, as said, cool and dark (not freezing)
and yes, the kits do die with age. the amount of time fluxates though, depending on how it has been stored. i believe what happens is the formaldehyde slowly gets eaten by the sulphuric acid.
also, i'd like to hear other peoples reports of what happens when their kits have expired. i've heard one person say it gives false positives, but i don't believe this. any comments?
i think it would be very prudent of testing kit makers to put the expiry signs in the instructions.
on an unrelated note, i think that black should be removed from the test result instructions for a positive MDxM result. in every pill i have tested, the result may appear black at first, but under a bright light and when the plate is tipped (so the solution spreads thinly) the result is always dark purple.
good points there.
formaldehyde melts/freezes at -92°C, but it's not the major component of the solution (and not really enough for much melting point depression to occur); sulfuric acid freezes, depending on concentration, a bit below 0°C. so don't keep them in your freezer. don't store it in your fridge either; it's way too toxic to risk storing it near food. room temperature or somewhere around there (like a basement) would be good. *dark* is just as important, and choosing a test kit with a brown glass bottle would also help.
about the black reaction:
of course. 'black isn't a color'. a compound may appear black if it absorbs the entire visible-light spectrum. it's possible, obviously, but very few organic compounds or even organosulfur compounds are actually black. i'd agree, view it on a white background under bright light, spread thinly and you'll most likely see that it's purple.
btw, since non-ring-substituted methamphetamine turns orange, i'd assume that the purple color is actually the combination of more than one light-absorbing segments of the derivative molecule.
if anyone has any idea where i might find ultraviolet-visible spectra for Marquis reagent adducts, i'd really like to see some... =)
formaldehyde melts/freezes at -92°C, but it's not the major component of the solution (and not really enough for much melting point depression to occur); sulfuric acid freezes, depending on concentration, a bit below 0°C. so don't keep them in your freezer. don't store it in your fridge either; it's way too toxic to risk storing it near food. room temperature or somewhere around there (like a basement) would be good. *dark* is just as important, and choosing a test kit with a brown glass bottle would also help.
about the black reaction:
of course. 'black isn't a color'. a compound may appear black if it absorbs the entire visible-light spectrum. it's possible, obviously, but very few organic compounds or even organosulfur compounds are actually black. i'd agree, view it on a white background under bright light, spread thinly and you'll most likely see that it's purple.
btw, since non-ring-substituted methamphetamine turns orange, i'd assume that the purple color is actually the combination of more than one light-absorbing segments of the derivative molecule.
if anyone has any idea where i might find ultraviolet-visible spectra for Marquis reagent adducts, i'd really like to see some... =)
Chemical Generation
Bluelighter
Check out our website FAQs for more information on how to store your test kit, how long it should last, and Advanced Pill Testing techniques. You are very right in your summation about lighting and swirling. We had recommended this from the very start.
As for the mechanism and Visible absorption spectrum of the conjugates, well, not a simple thing. You're dealing with transient chromophores (light absorbing things) called Quinones.
Contact us offline if you're really interested in this, and I will get you some more information.
B.
Chemical Generation
As for the mechanism and Visible absorption spectrum of the conjugates, well, not a simple thing. You're dealing with transient chromophores (light absorbing things) called Quinones.
Contact us offline if you're really interested in this, and I will get you some more information.
B.
Chemical Generation