Oops. What converter, you ask? This one: http://www.amamanualofstyle.com/page/si-conversion-calculator
Sorry. ________________________________ From: John M. Steele <jmsteele9...@sbcglobal.net> To: U.S. Metric Association <usma@colostate.edu> Sent: Sun, May 19, 2013 6:06:45 PM Subject: [USMA:52787] Re: B12 values I can't answer the question, but I will observe that the Journal of the American Medical Association seems to make the same assumption. This converter (scroll down to table 2) is the only publically available part of the Manual of Style for their journal. You have to be a member for the rest. Assuming you know the underlying reactions (I don't) the values expressed in amount of substance divided by volume may be more useful. American lab results are commonly expressed as mass/volume in appropriate units (with volume often 1 dL). Much of the rest of the world uses amount of substance/volume (with volume usually 1 L). The numerator prefix is scaled to be "sensible" for the result. ________________________________ From: James Frysinger <j...@metricmethods.com> To: U.S. Metric Association <usma@ColoState.EDU> Sent: Sun, May 19, 2013 4:59:25 PM Subject: [USMA:52785] B12 values I was doing some research for my sister's use of vitamin B12 supplements and came to this page: http://www.webmd.com/diet/vitamin-b12-15239?page=2 It contains a small chart: Vitamin B12Normal: More than 200-835 picograms per milliliter (pg/mL) 148-616 picomoles per liter (pmol/L) (SI units) Interestingly, WebMD apparently considers picomoles per liter to be in SI units but picograms per milliliter not to be in SI units. Of course, the non-SI unit is the liter (or milliliter) but that's acceptable for use with the SI. So, in my mind neither value statement is "more SI" than the other. How do you view this, Paul Trusten? Jim
