Certification of elements in and use of standard reference material 3280 multivitamin/multielement tablets.

GreGory C. Turk, kaTherine e. SharpleSS, Danielle ClevelanD, CanDiCe JonGSma, elizabeTh a. maCkey, anThony F. marlow, rabia oFlaz, riCk l. paul, John r. Sieber, roberT Q. ThompSon, laura J. wooD, lee l. yu, rolF zeiSler, STephen a. wiSe, and JameS h. yen National Institute of Standards and Technology, 100 Bureau Dr, Gaithersburg, MD 20899 STeven J. ChriSTopher, ruSSell D. Day, and STephen e. lonG National Institute of Standards and Technology, 331 Fort Johnson Rd, Charleston, SC 29412 ella Greene and JameS harnly U.S. Department of Agriculture, Food Composition Methods Development Laboratory, 10300 Baltimore Blvd, Beltsville, MD 20705 i-pin ho Grocery Manufacturers Association, 1350 I St, Washington, DC 20005 JoSeph m. beTz National Institutes of Health, Office of Dietary Supplements, 6100 Executive Blvd, Room 3B01, MSC 7517, Bethesda, MD 20892-7517