This is a message from the Museumpests List. To post to this list send it as an email to pestlist@museumpests.net To unsubscribe please look at the footer of this email. ----------------------------------------------------------- All,
This thread brings good material to the surface - I will store it in my files. Before I researched this particular product, I had a very sketchy understanding of how laboratory testing (or lack thereof) was done in the infancy stages of developing pesticides. Your input on this has been great....thx for posting. I will plan on reposting with the rest of the figures I have so my question will make more sense. From: ad...@museumpests.net [mailto:ad...@museumpests.net] On Behalf Of abdul.r...@krepl.in Sent: Saturday, March 30, 2013 3:54 AM To: pestlist@museumpests.net Subject: RE: [pestlist] Math headache This is a message from the Museumpests List. To post to this list send it as an email to pestlist@museumpests.net<mailto:pestlist@museumpests.net> To unsubscribe please look at the footer of this email. ----------------------------------------------------------- Dear all, In determining the acceptable daily intake (ADI) in which you have shown an among 0f 0.16328 mg for a human being having 180 Ibs (equivalent to 81.64 Kg.). This figure of 0.16328 mg arrived at by 0.0002 x 81.64,. Generally ADI is calculated as NOEL (most sensitive species like dog/ safety factor which could be minimum 100 to even 500, multiplied by the average weight of adult human which could range from 60 kg to 80 kg. Similarly on children ADI is calculate on their average body weight. Regarding your query , whether the amount 0.016328 mg equivalent to in ppm, will be the same as in case of solid/ liquid of solid/solid case the mg is equivalent to ppm. Only in case of gaseous systems where the amount in a particular volume of gas/ air depends on pressure and temperature, hence it is not a fixed system and wherein ppm will not be the same as mg per liter. Generally in case of gaseous system ppm is converted to mg or vice versa by considering density of gas/air at particular temperature. Hence in my opinion in case of human physical system which is perfectly a solid system, mg/kg will equivalent to ppm. Regards. Dr. Abdul Rauf From: ad...@museumpests.net<mailto:ad...@museumpests.net> [mailto:ad...@museumpests.net] On Behalf Of Ellen Pearlstein Sent: Saturday, March 30, 2013 10:59 AM To: pestlist@museumpests.net<mailto:pestlist@museumpests.net> Subject: RE: [pestlist] Math headache This is a message from the Museumpests List. To post to this list send it as an email to pestlist@museumpests.net<mailto:pestlist@museumpests.net> To unsubscribe please look at the footer of this email. ----------------------------------------------------------- Hi all, It would not be typical for mg/kg to be equal to ppm, since the first is weight per weight, and the second is a count of one type of particle per total particles. The second (ppm) relies on the molecular weight of the gas and barometric pressure, since lighter particles under lower pressure disperse more readily resulting in fewer parts per million. With the name of the gaseous product you can likely look up the molecular weight; barometric pressure is often standardized at the normal atmospheric pressure at sea level which is 1013 hPa (which equals 1013 mbar, 760 mm Hg, or 1 atmosphere). The latter bit of info comes from http://iaq.dk/index.html#index, Conversion Calculator for pollutants. Do let us know what you figure out! all best, Ellen Pearlstein ________________________________ From: rjo...@cwf.org<mailto:rjo...@cwf.org> To: pestlist@museumpests.net<mailto:pestlist@museumpests.net> Subject: RE: [pestlist] Math headache Date: Fri, 29 Mar 2013 22:36:58 +0000 This is a message from the Museumpests List. To post to this list send it as an email to pestlist@museumpests.net<mailto:pestlist@museumpests.net> To unsubscribe please look at the footer of this email. ----------------------------------------------------------- The risk of introduction is primarily ingestion, but it could be introduced dermally at a much lower level. From: ad...@museumpests.net<mailto:ad...@museumpests.net> [mailto:ad...@museumpests.net] On Behalf Of bugma...@aol.com<mailto:bugma...@aol.com> Sent: Friday, March 29, 2013 6:33 PM To: pestlist@museumpests.net<mailto:pestlist@museumpests.net> Subject: Re: [pestlist] Math headache This is a message from the Museumpests List. To post to this list send it as an email to pestlist@museumpests.net<mailto:pestlist@museumpests.net> To unsubscribe please look at the footer of this email. ----------------------------------------------------------- Ryan - What is the product, a gas being inhaled or something being swallowed?? Tom -----Original Message----- From: Jones, Robert (Ryan) (Ryan) <rjo...@cwf.org<mailto:rjo...@cwf.org>> To: pestlist <pestlist@museumpests.net<mailto:pestlist@museumpests.net>> Sent: Fri, Mar 29, 2013 5:11 pm Subject: [pestlist] Math headache This is a message from the Museumpests List. To post to this list send it as an email to pestlist@museumpests.net<mailto:pestlist@museumpests.net> To unsubscribe please look at the footer of this email. ----------------------------------------------------------- Group, I am trying to determine the safe/unsafe exposure levels for a particular product and am not sure my calculations are correct. Here it is: The estimate for acceptable daily intake for this product (I know...this is an arbitrary figure to begin with) is .0002 mg/kg. A 180 lb. human weighs 81.64 kg. This makes the acceptable daily intake for that person .016328 mg. Can this number be converted/translated into ppm? There are some that claim the answer would be .016328 ppm, and others say it is an impossible equation because the only way this can be converted is with mg/liters. Any thoughts? I just need a ballpark figure. Thanks! Ryan Jones Integrated Pest Management Specialist [Colonial_Williamsburg_Logo.jpg] P.O. Box 1776 Williamsburg, VA 23187 (757) 220-7080 rjo...@cwf.org<mailto:rjo...@cwf.org> ---------------------------------------------------------------------- To send an email to the list, send your msg to pestlist@museumpests.Net<mailto:pestlist@museumpests.Net> To unsubscribe from this list send an email to pestlist@museumpests.net<mailto:pestlist@museumpests.net> and in the subject put: "unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. 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To change to the DIGEST mode send an email to imail...@museumpests.net<mailto:imail...@museumpests.net> with this command in the body: set mode digest pestlist Any problems email l...@collectionpests.com<mailto:l...@collectionpests.com> or l...@zaks.com<mailto:l...@zaks.com> ---------------------------------------------------------------------- To send an email to the list, send your msg to pestlist@museumpests.Net To unsubscribe from this list send an email to pestlist@museumpests.net and in the subject put: "unsubscribe" - no quotes please. You are receiving the Pestlist emails in standard mode. To change to the DIGEST mode send an email to imail...@museumpests.net with this command in the body: set mode digest pestlist Any problems email l...@collectionpests.com or l...@zaks.com
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