In October 2012, Microsoft released a new version of Microsoft Office Mobile for Windows Phone 8 and Windows Phone 7.8. This was followed up by the release of Office Mobile for iPhone on 14 June 2013, and Office Mobile for Android phones on 31 July 2013.
That's an easy number to work with, so let's use it. 20 drops/milliliter = 20,000 drops/liter =1,000,000 drops / 50 liters. That means one part per million is the same as one drop of a substance in a million drops, or 50 liters, of water.
There are 33.814022 fluid ounces in a liter for U.S. fluid ounces (fl oz). There are 35.195083 fluid ounces in a liter for Imperial Canadian and U.K. fluid ounce (fl oz). One liter is equal to 1 m-3. U.S fluid ounce is equal to 2.957353 m-5. U.K. fluid ounce is equal to 2.841306 m-5. 1 liter is approximately equal to 33.81 fl oz U.S. 1 liter is approximately equal to 35.19 fl oz U.K.