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What tools do you use when weighing out micro grams of a solid white powder?


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#1 I_love_immuno

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Posted 17 July 2011 - 08:27 AM

Hello, I was wondering if there are any good tips or tools that are used( special spatulas or something) that are used to put very small amounts of white powders onto a micro scale, then off of the microscale into solution. The problem is the amounts are so small that it is :
a ) hard to get a small amount from the small bottle to the weigh boat with the paper on top.
b ) it is impossible to move the powder from the weigh boat into the eppendorph tube ensuring that all of the powder has been transfered.

I was wondering if there are special tools or procedures that are used for these issues.
Thanks

#2 hobglobin

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Posted 17 July 2011 - 08:42 AM

Hello, I was wondering if there are any good tips or tools that are used( special spatulas or something) that are used to put very small amounts of white powders onto a micro scale, then off of the microscale into solution. The problem is the amounts are so small that it is :
a ) hard to get a small amount from the small bottle to the weigh boat with the paper on top.
b ) it is impossible to move the powder from the weigh boat into the eppendorph tube ensuring that all of the powder has been transfered.

I was wondering if there are special tools or procedures that are used for these issues.
Thanks

I directly weigh in the Eppendorf tube and use a not too heavy lid with high enough rim as mount for the tube.

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#3 casandra

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Posted 17 July 2011 - 09:04 AM


Hello, I was wondering if there are any good tips or tools that are used( special spatulas or something) that are used to put very small amounts of white powders onto a micro scale, then off of the microscale into solution. The problem is the amounts are so small that it is :
a ) hard to get a small amount from the small bottle to the weigh boat with the paper on top.
b ) it is impossible to move the powder from the weigh boat into the eppendorph tube ensuring that all of the powder has been transfered.

I was wondering if there are special tools or procedures that are used for these issues.
Thanks

I directly weigh in the Eppendorf tube and use a not too heavy lid with high enough rim as mount for the tube.

and you can use a microspatula- stainless steele with pointed or tapered tips so you can deposit the powder easily into the bottom of the tube...
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#4 I_love_immuno

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Posted 17 July 2011 - 09:19 AM


Hello, I was wondering if there are any good tips or tools that are used( special spatulas or something) that are used to put very small amounts of white powders onto a micro scale, then off of the microscale into solution. The problem is the amounts are so small that it is :
a ) hard to get a small amount from the small bottle to the weigh boat with the paper on top.
b ) it is impossible to move the powder from the weigh boat into the eppendorph tube ensuring that all of the powder has been transfered.

I was wondering if there are special tools or procedures that are used for these issues.
Thanks

I directly weigh in the Eppendorf tube and use a not too heavy lid with high enough rim as mount for the tube.


Awesome, u have sparked many good ideas... thanks!

#5 I_love_immuno

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Posted 17 July 2011 - 09:20 AM



Hello, I was wondering if there are any good tips or tools that are used( special spatulas or something) that are used to put very small amounts of white powders onto a micro scale, then off of the microscale into solution. The problem is the amounts are so small that it is :
a ) hard to get a small amount from the small bottle to the weigh boat with the paper on top.
b ) it is impossible to move the powder from the weigh boat into the eppendorph tube ensuring that all of the powder has been transfered.

I was wondering if there are special tools or procedures that are used for these issues.
Thanks

I directly weigh in the Eppendorf tube and use a not too heavy lid with high enough rim as mount for the tube.

and you can use a microspatula- stainless steele with pointed or tapered tips so you can deposit the powder easily into the bottom of the tube...


I shall seek out a micro spatula!
thanks

#6 Prep!

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Posted 17 July 2011 - 09:10 PM

don forget to tare the miocrotube before weighing!!! :D
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#7 I_love_immuno

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Posted 17 July 2011 - 11:15 PM

Haha for sure. That process takes like 10 -20 minutes with my crazy scale :(




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