on the counter with the inner side up
on the counter with the inner side up
If the cover of a reagent bottle is placed on a table with the bottom down, it can pick up material from the table which would contaminate the contents of the reagent bottle after the cap is put back on the bottle.
The stopper of a chemical reagent container should be handled carefully for two reasons. Firstly, it may contain chemical residues which can be dangerous. Additionally, if the stopper is dirtied it may contaminate the reagent in the bottle when the stopper is put back on.
used as a container where you put chemicals that can't be thrown in the sink.
wash hands and clean glassware
It might pick up dirt and other contamination from the surface upon which it is placed, and this could then be transferred to whatever is in the chemical bottle. If this happens, any time you now use the chemical in the bottle, it is contaminated.
If the cover of a reagent bottle is placed on a table with the bottom down, it can pick up material from the table which would contaminate the contents of the reagent bottle after the cap is put back on the bottle.
The stopper of a chemical reagent container should be handled carefully for two reasons. Firstly, it may contain chemical residues which can be dangerous. Additionally, if the stopper is dirtied it may contaminate the reagent in the bottle when the stopper is put back on.
used as a container where you put chemicals that can't be thrown in the sink.
So you don't get water, dirt or other contaminants in the reagent bottle. The reagent bottle should contain chemicals that are as pure as possible. If each person put a dirty spatula in the bottle, the reagent bottle would very quickly accumulate all kinds of junk, ruining the chemicals inside or causing hazardous chemical reactions.
So you don't get water, dirt or other contaminants in the reagent bottle. The reagent bottle should contain chemicals that are as pure as possible. If each person put a dirty spatula in the bottle, the reagent bottle would very quickly accumulate all kinds of junk, ruining the chemicals inside or causing hazardous chemical reactions.
This standard procedure -dry and clean spatula in scooping solid chemicals from reagent bottle- should prevent contamination of - and exposure to dirt and humidity to - the other chemical reagents.
use shuvel mate!!
dispose of the excess as directed
Contamination. Your stock solution has a known molarity and should not be contaminated with anything. Even a "clean" pipette tip. Its just good lab etiquette.
the pump should be in the washer bottle and replacement is as easy as removing the bottle most times
wash hands and clean glassware
1. do not remove desiccant pack from bottle, if present 2. avoid touching reagent areas of strips, or touching tablets. 3. check expiry date 4.immerse strip fully in urine for time specified. 5. read at recommended time 6.the best results are obtained on fresh specimens 7.testing should take place within one hour of voiding 8.ensure bottle cap is replaced tightly, immediately after removing strip or tablet.