IGEM:MIT/2006/Notebook/2008-2-10: Difference between revisions
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*molecular weight of isoamyl acetate = 130.19 from [http://www.jtbaker.com/msds/englishhtml/p1256.htm] | *molecular weight of isoamyl acetate = 130.19 from [http://www.jtbaker.com/msds/englishhtml/p1256.htm] | ||
*The FW of an ion species is equal to its concentration in ppm at 10<sup>-3</sup>M. Fluoride has a FW of 19, hence a 10<sup>-3</sup>M concentration is equal to 19ppm, 1M is equal to 19,000 ppm and 1ppm is equal to 5.2 x 10-5M. from [http://delloyd.50megs.com/photo.html] | *The FW of an ion species is equal to its concentration in ppm at 10<sup>-3</sup>M. Fluoride has a FW of 19, hence a 10<sup>-3</sup>M concentration is equal to 19ppm, 1M is equal to 19,000 ppm and 1ppm is equal to 5.2 x 10-5M. from [http://delloyd.50megs.com/photo.html] | ||
*1 g/mL = 1000000000 ppb | |||
*1 ppb has 1 gram of substance for every billion grams of solution (http://www.ilpi.com/msds/ref/concentration.html) | |||
*A solution with 1 ppb of solute has 1 microgram (10-6 g) of material per liter. | |||
==Isoamyl alcohol== | ==Isoamyl alcohol== | ||
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*molecular weight = 152.15 g/mol | *molecular weight = 152.15 g/mol | ||
*[http://www.sciencelab.com/xMSDS-Methyl_salicylate-9927362 odor threshold = 0.1 ppm] = 0.7 μM | *[http://www.sciencelab.com/xMSDS-Methyl_salicylate-9927362 odor threshold = 0.1 ppm] = 0.7 μM | ||
* | *40 ppb (http://pubs3.acs.org/acs/journals/doilookup?in_doi=10.1021/jf00091a074) = 0.3 μM | ||
===Isoamyl acetate=== | ===Isoamyl acetate=== | ||
*molecular weight = 130.18 g/mol | *molecular weight = 130.18 g/mol | ||
*[http://www.sciencelab.com/page/S/PVAR/10416/SLI1900 odor threshold = 0.22 ppm] = 1.7 μM | *[http://www.sciencelab.com/page/S/PVAR/10416/SLI1900 odor threshold = 0.22 ppm] = 1.7 μM | ||
Revision as of 09:17, 17 March 2008
General
- 1 g/mL = 1000000 ppm (from Stephen)
- 1 ppm = μg/g = μg/ml = ng/mg = pg/μg = 10-6 from [1]
- molecular weight of isoamyl acetate = 130.19 from [2]
- The FW of an ion species is equal to its concentration in ppm at 10-3M. Fluoride has a FW of 19, hence a 10-3M concentration is equal to 19ppm, 1M is equal to 19,000 ppm and 1ppm is equal to 5.2 x 10-5M. from [3]
- 1 g/mL = 1000000000 ppb
- 1 ppb has 1 gram of substance for every billion grams of solution (http://www.ilpi.com/msds/ref/concentration.html)
- A solution with 1 ppb of solute has 1 microgram (10-6 g) of material per liter.
Isoamyl alcohol
- 13.6 μL isoamyl alcohol in 25 mL culture
- molecular weight of isoamyl alcohol = 88.15 g/mol from [4]
- specific gravity = 0.813 at 15°C relative to water at 4°C (Merck Index)
- 5 mM isoamyl alcohol
Salicylic acid
- 276 ppm salicylic acid
- molecular weight of salicylic acid = 138.123 g/mol
- 276 ppm = 1.998e-3 M = 2 mM salicylic acid
Odor thresholds
Also see http://www.leffingwell.com/odorthre.htm
Methyl salicylate
- molecular weight = 152.15 g/mol
- odor threshold = 0.1 ppm = 0.7 μM
- 40 ppb (http://pubs3.acs.org/acs/journals/doilookup?in_doi=10.1021/jf00091a074) = 0.3 μM
Isoamyl acetate
- molecular weight = 130.18 g/mol
- odor threshold = 0.22 ppm = 1.7 μM
