Bill Merrill on thu 24 sep 09
I just received another email from Mason Color after my conversation
with them. During the phone conversation with them I was told one of
their cobalt stains had 25 parts per million of arsenic in it. Today I
received the following message from Mason Color:
=3D20
Dear Bill
You were misinformed on the content of As it is actually <10ppm in our
Co stains Best Regards Mike Henderson Lab Manager Mason Color
=3D20
Edouard Bastarache on thu 24 sep 09
Bill,
In Quebec, our standards in drinhing water
Arsenic(As) 0.025 mg/l
Cadmium(Cd) 0,005 mg/l
Which one is more toxic?
And we use Cadmium in pottery
"
Arsenic in soil (predominantly inorganic) originates from underlying
materials that form soils, industrial wastes, or the use of arsenical
pesticides. In Canada, average concentrations of arsenic in soil range from
4.8 to 13.6 mg/kg (Kabata-Pendias and Pendias, 1984). U.S. background level=
s
are similar, ranging from 1 to 40 mg/kg, with a mean of approximately 5
mg/kg (ATSDR, 2000). Significantly higher concentrations in soil have been
found near smelters (means of 50-100 mg/kg), near gold mining operations
(means of 60-110 mg/kg), in arsenical-treated soils (means up to 54 mg/kg),
and at wood preservation sites (means up to 6000 mg/kg) (Environment Canada
and Health and Welfare Canada, 1993). Generally, exposure from soil is
potentially significant only in those circumstances where residential
neighbourhood areas have been built in contaminated sectors.
While exposure to arsenic via soil is unlikely to be a concern for older
children and adults, hand-to-mouth behaviour and intentional ingestion may
result in significant exposure for young children. In unexposed and exposed
populations, young children (?4 years) were estimated to be exposed to
0.02-0.05 and 0.01-1.9 =B5g/kg bw per day, respectively (Environment Canada
and Health and Welfare Canada, 1993)."
Gis,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://edouardbastarache.blogspot.com/
http://substitutions.blogspot.com/
http://www.flickr.com/photos/30058682@N00/
http://albertpaintings.blogspot.com/
http://cerampeintures.blogspot.com/
----- Original Message -----
From: "Bill Merrill"
To:
Sent: Thursday, September 24, 2009 3:41 PM
Subject: Mason Stain/less arsenic
I just received another email from Mason Color after my conversation
with them. During the phone conversation with them I was told one of
their cobalt stains had 25 parts per million of arsenic in it. Today I
received the following message from Mason Color:
Dear Bill
You were misinformed on the content of As it is actually <10ppm in our
Co stains Best Regards Mike Henderson Lab Manager Mason Color
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