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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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Convert weight percentage (EDX) into ppm
Q. A SEM/EDX analysis on Aluminium bond pad (AlCu0.5%) detected 2% weight percentage of Chlorine, besides common elements Al, C, O & Ti. May I know how to convert this Chlorine weight percentage into ppm ?
Liew CSEmployee - Malaysia
February 22, 2009
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First of three simultaneous responses -- A. 2% would be 20,000 ppm Terry Tomt- Auburn, Washington February 25, 2009 |
ACRONYMS: |
Second of three simultaneous responses --
A. The easy answer is .0001% = 1 ppm.
Kurt Sammons- Inman, South Carolina
February 25, 2009
Third of three simultaneous responses --
A. 2% is 2 parts per hundred, so I would guess that you need to multiply that by 10,000 to get parts per million.
PS, I rather doubt that number unless it has salt on the surface or had a chlorinated plastic residue.
- Navarre, Florida
February 25, 2009
March 1, 2009
A. Remember that EDX is an analysis of the surface only and may not represent the overall composition of the target.
The conversion appears simple but I would be very careful what conclusions I reached from the figures.
Geoff Smith
Hampshire, England
Q. I have been analysing bark samples for chlorine content and have been able to achieve chlorine as a weight percentage. Does anyone know how to convert from weight percentage to ppm?
Denis Delaney- Wexford, Ireland
August 14, 2009
A. Hi, Denis. The previous answers seemed to explain it, but I guess it wasn't as clear as I thought. 'ppm' is parts per million by weight. 1 percent by weight would be 10,000 ppm.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
August 14, 2009
Q. A SEM/EDX analysis on Mold compound (SiO2 -80%) detected 0.33% weight percentage of Bromine, besides common elements Mg,Si, Zn, C , O.
May I know how to convert this Bromine weight percentage into ppm?
Hiew Mei Fenstudent - Malaysia
December 2, 2009
A. Hi, Hiew. As mentioned, the meaning of "ppm" is simply "parts per million by weight". You have 3.3 parts per thousand by weight, which would be 3300 ppm. I am having a hard time understanding why you would ask this question in light of the previous question that was rather clearly answered four times :-)
But please read Geoff Smith's caution.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
December 2, 2009
Q. I am working on SEM/EDX my chlorine reading in coal is 0.61 wt.%
What will be equivalent in ppm?
- Jamshoro-Sindh, Pakistan
September 27, 2014
A. Hi Dr. Siddiqui. 0.61 wt.% is 6100 ppm. The question you are asking has been answered so many times on this page that we are apparently not communicating the actual question.
I suspect that the issue may relate to the idiosyncrasies of English, rather than the simple math: "%" is the same thing as "percentage", "wt." is the same as "weight", and "weight %" is the same thing as "% by weight". Best of luck.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
September 2014
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