04-10-03 10:55
No 425422
Swim has heard/seen lab grade ,reagent grade, acs grade , and 'pure'....
What are the differences seen between these purity categories???
Sure as quality goes down , so does price . But swim was wondering if this bee could skate by with just using the lowest grade of chemical available. Swim knows that better quality chems mean higher yields , but swim is only doing this for education purposes
my guru once told me to "just be" , now I realize he meant "just bee" :)
(Hive Bee)
04-11-03 19:01
No 425897
Reagent ACS
Meets ACS specifications defines chemicals that confom to requirements established by the comitee of analytical reagents of the American Chemical Society. Maximum limits of impurities are printed on the labels. In many cases actual analysis of the product is given
LAB-GRADE
Suitable for general laboratory work. Generally meet or exceed the specifications listed in the latest edition of the United STates Pharmacopeia/National Formulary(USP/NF). Often recommended for most educationnal purposes
PURIFIED
Chemicals of good quality whewre there are no official standards but which are sufficiently high purity to be suitable for many uses.
Technical
Commercial grade chemicals which are clean and of reasonnable chemical purity. Theses are generally intended for industrial use but also find use in some laboratory applications
Of Course there is also HPLC grade, but that dont need explaining.
Hope that helps!
(Hive Addict)
04-12-03 00:05
No 425997
Purity goes down like that:
HPLC-->ACS-->Lab grade-->Purified-->Technical
For those about to synth,we salute you
(Hive Addict)
04-12-03 02:44
No 426028
O.K., but where is reagent grade??
Sometimes, I wake up Grumpy,............Other times,..I just let her sleep !
(Hive Addict)
04-12-03 04:24
No 426050
I think lab grade is equal to reagent grade...
For those about to synth,we salute you
(Hive Addict)
04-12-03 14:06
No 426140
so would i
(Hive Addict)
04-13-03 10:09
No 426344
Cool !!! Thanx bees!! S/D has often wondered WTF, "reagent", grade was exactly, but didn't really want to ask.
Sometimes, I wake up Grumpy,............Other times,..I just let her sleep !
(Distinctive Doe)
04-13-03 20:29
No 426505
Purity goes down like that:
HPLC-->ACS-->Lab grade-->Purified-->Technical
Not necessarily. ACS grade only applies to chemicals which the ACS sets guidelines for. Purified could fall anywhere in that spectrum above technical.
They should all bee satisfactory for 99% of Bee's purposes. Just make sure to dry lower grade solvents and most hygroscopic solvents if they need to bee dry.
(spineless pussy)
09-09-03 10:35
No 457928
Now, could some kind individual please tell S/D what U.S.P. ,means?
Spineless Pussy - Ancient Hebrew -meaning - One with great humility and fortitude.
09-09-03 11:04
(Rated as: misinforming)
(Hive Bee)
09-09-03 11:46
No 457944
US Pharmacopea, products given this grade are suitable for use in pharmaceutical applications, and they usually have an FCC grade too, FCC is the Food Chemicals Codex, which means they are pure enough to be consumed or used cosmetically by humans.
Chemicals of USP grade are often more pure than lab/reagent grade I believe, because there are specific limits of contaminations like heavy metals, etc. that may have higher allowable limits in lab grade chems.
-blaaky
If you want divine justice, die.