Reasearch chemicals weighing

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Reasearch chemicals weighing

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June 1, 2012 at 10:29 am

#678913
1

blasty

@blasty

Member
Ok call me stupid but I thinbk this is how I see it. I decided to go ahead and buy some 5-meo-dalt. Accoring to the site I got it from I bought the cheapest package at 1g. To me 1g always meant 1gram, suspect I am right. The normal dose of this stuff is 10mg to 25mg. There are 100 mg’s to 0.1g. IN which case taking this at a higher dose of 25mg I have enough for like 40 doses? Thats crazy lol I see people say they take 2g over a few days. Making sure I am getting this right as I may want to start as low as 5mg and eyeballing that will be nigh on impossible. Not sure I can be arsed to fork out for scales, look dam pricey. This stuff may end up on a shelf. If I am getting this wrong let me know.

Cheers
June 1, 2012 at 11:26 am

#786967
1

know_hope

@know_hope

Member
you need good scales to weigh 5mg. i have some scales i got for about £25 and the supposedly do 0.001g but i can drop 5 mg on it and it doesn’t blink. if you want to measure very low doses accurately you’ll have to spend some money on decent scales. dont think just cos it has units as small as 1mg that it can actually weigh it. i haven’t tried the stuff myself. but yeh, if your dose is 25mg then you’ll have 40 doses per g. 25mg is a common dose, but i haven’t tried 5-meo-dalt so i have nothing to say about how much to take other than 2g sounds like quite a lot.
June 1, 2012 at 11:38 am

#786963
1

p0ly

@p0ly

Participant
go to ebay, seach .001 scales. you will see some from china for 10-15 pounds, they are VERY good for the price you just have to wait 7-14 days for their arrival.
June 1, 2012 at 12:50 pm

#786970
1

Pat McDonald

@pat-mcdonald

Participant
OK, honestly haven’t used good scales for a long time, but just thought I’d mention that scales good for measuring very small weights generally are not good for larger measurements – and true the other way around.

So yes worth investing in the right kit is definitely worth it for what you have in mind. Buying old school scientific balance scales at jumble or car boot sales is rarely cheaper, because scientific instruments are seen as very valuable (even if they are obsolete old school). But if you’re link is in you might come across a set, complete with weights, for a bargain price. I haven’t been so lucky in that respect but I know one or 2 people who have been.
June 1, 2012 at 1:04 pm

#786964
1

p0ly

@p0ly

Participant
@Pat McDonald 481745 wrote:

OK, honestly haven’t used good scales for a long time, but just thought I’d mention that scales good for measuring very small weights generally are not good for larger measurements – and true the other way around.

correctamundo brother.
June 14, 2012 at 10:08 am

#786971
1

blasty

@blasty

Member
Thanks for the advice guys. In the end I went the ebay route but forked out an extra £10 but with free shipping for a UK based seller. £25 in total not bad as I can use the scales for other purposes too. If they get here Saturday might be able to experiment 😀
June 16, 2012 at 3:09 pm

#786972
1

blasty

@blasty

Member
Scales are here in fact arrived yesterday. Not sure to use these or not though. First problem is they dont seem to pick up anything you are weighing until around 36mg. So I put a pin on the scale and that registered as 87mg. I then added small amounts of powder and the scale seemed to increased in mg’s from that point on. I could also remove the pin and be left with 14mg which is odd as the scale wont pick up 14mg from standing but does if you subtract the larger weight. My second concern is I weighed the pin various times. The pin was normally 85 to 88mg but once 85mg and another time 91mg. Hmm wondering how acurate these are TBH. Should I go for it with a guessed acuracy of +5 -5 mg? (Over estimated just in case) I could go with 7mg 5-Meo-dalt and worst case scenarios are 2mg PMSL or 12mg. The scale comes with an acuracy chart but it make no sense to me. If it does to someone else I could always scan it and post here? Cheers for any help. Would like to have ago tonight (Saturday) so any quick information appreciated.
June 17, 2012 at 8:05 am

#786956
[deleted]

@[deleted]

Guest
static charge might have something to do with that, check it out by de-charge all things to ground before you start the scale, your self incl.
June 17, 2012 at 9:48 am

#786957
[deleted]

@[deleted]

Guest
I always weigh several times and take an average. For that price you’ll not get proper accurate scales as decent ones cos a few hundred for weighing that small amounts, but it’s miles better then eye balling it!
June 17, 2012 at 10:47 am

#786973
1

blasty

@blasty

Member
Thanks for the advice both will take that on board. I did some tests with them last night and in fact I did exactly what the above post by DaftFader said. I weighed numoerous times until I was happy. Scales are very sensitive noted at one stage they even go up a few mg if I breath heavy in their direction. Thanks for both pieces of advice.
June 20, 2012 at 12:38 am

#786965
1

mjax

@mjax

Member
To test the accuracy of a sensitive balance you need a known mass in the range that you want to measure. Graph paper and a less sensitive balance will be needed to carry out this accuracy test.

Place 10 sheets of graph paper on the balance. Fold the sheets so they sit on the balance neatly and you should now have the mass of 10 sheets of graph paper. Divide by 10 to get the mass of 1 sheet.

Find the number of squares on a sheet. If you used A4 with 1mm x 1mm then you should have 62370 squares on a sheet of graph paper.

Divide the mass of 1 sheet of graph paper by 62370. You now have access to a known mass that is small enough to check the accuracy of your balance.
June 20, 2012 at 11:00 pm

#786968
1

know_hope

@know_hope

Member
i find the most accurate way to measure is to throw my scales out the window and hold a penny in one hand and my drugs in the other
June 21, 2012 at 3:32 am

#786958
[deleted]

@[deleted]

Guest
@mjax 484515 wrote:

To test the accuracy of a sensitive balance you need a known mass in the range that you want to measure. Graph paper and a less sensitive balance will be needed to carry out this accuracy test.

Place 10 sheets of graph paper on the balance. Fold the sheets so they sit on the balance neatly and you should now have the mass of 10 sheets of graph paper. Divide by 10 to get the mass of 1 sheet.

Find the number of squares on a sheet. If you used A4 with 1mm x 1mm then you should have 62370 squares on a sheet of graph paper.

Divide the mass of 1 sheet of graph paper by 62370. You now have access to a known mass that is small enough to check the accuracy of your balance.

Have you seen how small the plates are on budget 0.001 mg scales?

(nice post though :laugh_at:)
June 21, 2012 at 3:37 am

#786959
[deleted]

@[deleted]

Guest
@know_hope 484644 wrote:

i find the most accurate way to measure is to throw my scales out the window and hold a penny in one hand and my drugs in the other

You make me laugh sometimes.

When you were over mine …

“Ah fuck it these scales are shit! I’ll just do this much …”

*roughly guesses amount of drugs …

30 mins later …

“I think I did too much …”

I’ve been told this has happened a few other times as well hehe …

You really need to start employing the graph paper method! :laugh_at:
June 25, 2012 at 11:29 pm

#786966
1

mjax

@mjax

Member
Try doing a google on micro balance diy designs. You can build your own using some real basics such as art straws, card needles/cocktail sticks and blue tac to build a seesaw style balance. Might sound a bit blue peter but it does work well. You calibrate using the graph paper method described previously. BTW I am a physcist and quite confident in working out such problems. I built one of these to compare against a scale I purchased. You wouldn’t use a diy scale for everyday use due to time needed for building and then calibration. However if you want to check the accuracy of some cheap scales then your on winner.

To be truely accurate with dosage you would be much better off disolving large masses and using a volumetric approach.
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