<< I've been studying the content of selenium in kelp meal. It appears to run about .00004%. I'm trying to figure out how that would average for a sheep which consumed, say 1/2 ounce of kelpmeal per day (cattle consume roughly 2 ounces per day). The daily requirement for selenium that I have found is about 0.3 ppm, with a max of 0.7 ppm (wish I could find that in grams). >>
Too sleepy to calculate, but here are the formulas and conversions. Diana ~~~~~~~ http://www.upei.ca/~toxinfo/newsletter3.htm Common toxin concentration conversions and formulas: 1. To convert ppm to mg/kg: 1 ppm = 1 mg/kg (1 ppb = 1 Âg/kg) 1 ppm = 1 part per 1 million parts. The âpartsâ can be in any unit. So: 1 ppm = 1 g / 1,000,000 g = 0.000001 And: 1 mg/kg = 0.001 g /1,000g = 0.000001 Example: 50 ppm of a toxicant = 50 mg of toxicant per kg of total substance (for example, 50 mg of toxicant per kg of feed). _____________________ 2. To convert ppm to mg/l: 1 ppm = 1 mg/liter This is based on the idea that 1 ml of water weighs 1 gram (therefore 1 liter weighs 1 kg) Example: 10 ppm = 10 mg of toxicant per liter of total fluid ______________________ 3. To convert ppm to percent (%): 1 ppm = 0.0001% 1 ppm = 1 part /1,000,000 parts; 1 / 1,000,000 = 0.000001; 0.000001 = 0.0001% 1 percent = 1 part per 100 total parts. Rule of thumb: to convert ppm to percent, move the decimal point 4 places to the left. To convert percent to ppm, move the decimal point 4 places to the right. You can easily remember which way to move the decimal point because ppm is always larger than %. Examples: 1,000,000 ppm = 100 % 10,000 ppm = 1 % 100 ppm = 0.01 % 1 ppm = 0.0001 % ______________________ 4. To convert % of a liquid chemical in a liquid medium to volume/volume: % = ml/100 ml Example: ethanol 95% = 95 ml of ethanol per 100 ml of total solution _______________________ 5. To convert % of a solid chemical in a solid medium to weight/weight: % = grams/100 grams Example: cholecalciferol 0.075% = 0.075 grams of cholecalciferol per 100 grams of bait _________________________ 6. To convert % of a solid chemical in a liquid to weight/volume: % = gram/100 ml Once again, this is based on the idea that 1 ml water weighs 1 gram (therefore, 100 ml of water weighs 100 grams). Example: lidocaine 2% = 2 grams of lidocaine per 100 ml of total solution. This can be converted to mg/ml: (2 g/100 ml) x (1,000 mg/g) = 20 mg/ml ******************************************************** or http://www.eutechinst.com/techtips/tech-tips29.htm Convert ppm to mg: multiply ppm by liters = mg [ 1 milligram per liter = 1 ppm] Convert mg to grams: divide by 1000 mg/g = grams Convert grams to ounces: divide grams by 28.35 grams/ ounce = ounces or http://www.spexcsp.com/crmmain/technical/convers.htm .... 1 milligram (mg) = 0.001 grams (g) 1 milliliter (ml) = 0.001 Liters (L) 1 Liter (L) = 1000 milliliters (ml) 1 ug/ml = 1 part per million (ppm) = 1ug/g* 1 ug/L = 1 part per billion 1 mg/ml = 1000 ppm = 1mg/g* =============================================== This message is from the Barbados Blackbelly Sheep mailing list (http://www.awrittenword.com/listserv/index.html). To respond to this message, send e-mail to [EMAIL PROTECTED] To unsubscribe or change your membership options, go to http://lists.coyotenet.net/mailman/listinfo/blackbelly To search the archives, go to http://www.mail-archive.com/[EMAIL PROTECTED]/
