Method Comparisons

Blanck HM, Pfeiffer CM, Caudill SP, Reyes R, Gunter EW, Imperatore G. Serum iron and iron-binding capacity: a round-robin interlaboratory comparison study. Clin Chem. 2003; 49:1672-75. Full Text
Caldwell KL, Maxwell CB, Makhmudov A, Pino S, Braverman LE, Jones RL, Hollowell JG. Use of inductively coupled plasma mass spectrometry to measure urinary iodine in NHANES 2000: comparison with previous method. Clin Chem 2003 Jun;49(6 Pt 1):1019-21. Full Text
Dearth-Wesley T, Makhmudov A, Pfeiffer CM, Caldwell CM. Fast and reliable salt iodine measurement: evaluation of the WYD Iodine Checker in comparison with iodometric titration. Food and Nutrition Bulletin. 2004:25(2):130-36. Full Text
Fazili Z, Pfeiffer CM, Zhang M. Comparison of serum folate species analyzed by LC-MS/MS with total folate measured by microbiologic assay and bio-rad radioassay. Clin Chem. 2007;53(4):781-84. Full Text
Fazili Z, Pfeiffer CM, Zhang M, Jain RB, Koontz D. Influence of 5,10-methylenetetrahydrofolate reductase polymorphism on whole blood folate concentrations measured by LC-MS/MS, microbiologic assay, and BioRad radioassay. Clin Chem. 2008;54:197-201. Full Text
La'ulu SL, Rawlins ML, Pfeiffer CM, Zhang M, Roberts WL. Performance characteristics of six homocysteine assays. Am J Clin Pathol. 2008 Dec;130(6):969-75. Full Text
McCoy LF, Scholl PF, Sutcliffe AE, Kieszak SM, Powers CD, Rogers HS, Gong YY, Groopman JD, Wild CP, Schleicher RL. Human aflatoxin albumin adducts quantitatively compared by ELISA, HPLC with fluorescence detection, and HPLC with isotope dilution mass spectrometry. Cancer Epidemiol Biomarkers Prev. 2008 Jul;17(7):1653-7. Full Text
Rybak ME, Jain RB, Pfeiffer CM. Clinical vitamin B6 anlaysis: an inter-laboratory comparison of pyridoxal 5'-phosphate measurements in serum. Clin Chem. 2005;51(7):1223-31. Full Text
Pfeiffer CM, Cook JD, Mei Z, Cogswell ME, Looker AC, Lacher DA. Evaluation of an automated soluble transferrin receptor (sTfR) assay on the Roche Hitachi analyzer and its comparison to two ELISA assays. Clin Chim Acta. 2007 Jul;382(1-2):112-6. Full Text
Pfeiffer CM, Huff DL, Smith SJ, Miller DT, Gunter EW. Comparison of plasma total homocysteine measurements in 14 laboratories: an international study. Clin Chem. 1999;45(8):1261-68. Full Text
Pfeiffer CM, Smith SJ, Miller DT, Gunter EW. Comparison of serum and plasma methylmalonic acid measurements in 13 laboratories: An international study. Clin Chem. 1999 Dec;45(12):2236-42. Full Text
Zhang M, Gunter EW, Pfeiffer CM. Evaluation of the Drew Scientific ds30 homocysteine assay in comparison with the Centers for Disease Control and Prevention reference HPLC method. Clin Chem. 2001 May;47(5):966-7. Full Text
Zhang M, Pfeiffer CM. Comparing the ESA HPLC total homocysteine assay with electrochemical detection to the CDC in-house HPLC assay with fluorescence detection. Clin Chim Acta. 2004 Feb;340(1-2):195-200. Full Text