For anyone that was curious when I referenced “standards”, I
was referring to certified reference materials. These materials are the standards
that are used to check quality of other samples or in other words, they are
controls. They as well can be used for the calibration of instruments, which is
what I need it for.
·
This website gives me standards for the
following elements I am trying to find
o
Lead
o
Arsenic
o
Mercury
o
Barium
o
Cadmium
o
Chromium
o
Selenium
o
Silver
·
It clearly has standards for ICP, I am not sure
abut XRF
·
This website lists standards for different types
of water and soil
I need the soil and water sample so I can calibrate the
machine to read more materials than just toys. As well the listed elements refer
to the standards created by the Resource Conservation and
Recovery Act (RCRA):
·
Gives
EPA the authority to control hazardous waste from “cradle-to-grave”
·
This
includes generation, transportation, treatment, storage, and disposal of
hazardous waste
·
RCRA
also set up management of non-hazardous waste
Side Notes:
Metals:
Solid waste standards
The following
metals recorded and their levels are standards set up by the RCRA. I am not
positive if these are the maximum levels allowed in any source or if it relates
to one source such as soil or water.
levels found on.
. .
http://www.gpo.gov/fdsys/pkg/CFR-2012-title40-vol27/xml/CFR-2012-title40-vol27-part261.xml#seqnum261.32
As (arsenic)- .5 mg/L
Ba (barium)- 7.6 mg/L
Cd (cadmium)- .05 mg/L
Cr (chromium)- .33 mg/L
Pb (lead)- .15 mg/L
Se (selenium)- .16 mg/L
Ag (silver)- .3 mg/L
Hg (mercury)- .009 mg/L
SIDE NOTE: I did find other standards that were interesting.
Fertilizer
standards
Arsenic- .3 ppm
Cadmium- 1.4 ppm
Chromium- 2.8 ppm
Mercury- .3 ppm
No comments:
Post a Comment