PPM answer sheet

PPM answer sheet - Conversions 1%=10,000 ppm 1ppm= 1 g/g =...

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Conversions 1%=10,000 ppm 1ppm= 1 µg/g = 1 µg /mL = 1 mg/kg 1 lb. = 454 g 1 g = 1000g = 10^6 mg = 10^9 µg 1 g = 1000mg = 10^6 µg 1 g = 1 mL (for liquids) 1 g /100mL =percent (make sure all the units cancel out and you are left with the units you want) 1. Want to find parts scuds per 1 million parts water 20mg*28 =560mg/200mL = 2.8 mg scuds/mL Get to ppm convert to µg/mL 2.8 mg scuds/mL * (1000µg/1mg) =2800 ppm Get to % divide ppm by 10,000 2800 parts/million (1 mill/10,000%) =.28% 2. Want to find parts round worm per 1 million parts steak 8 oz. steak (1 lb./16 oz)*(454 g/1 lb) = 227 g steak 20 worms * 50 mg = 1000 mg worms 1000 mg worms/227 g steak = 4.4 mg worms/g steak (1000g/1 kg) = 4400 ppm 4400 ppm (1 mill/10,000 %) = .44% 3. Want to find % and ppm calcium in soda 5mg Ca/500mL soda (1000µg/mg) = 10 ppm 10 ppm (1 mill/10,000%) = .001
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