Literature Cited
- American Society of Brewing Chemists. Methods of Analysis, 7th ed. Beer-18A Iron analysis by colorimetry, −18B Iron analysis by atomic absorption spectrophotometry; Statistical Analysis-3 Ruggedness testing; Statistical Analysis-4 Youden unit block collaborative testing procedure. The Society: St. Paul, MN, 1976.
- Garza-Ulloa, H., Canales, A. M., and Zapata, B. D. An improved method for iron determination in beer using ferrozine. Proc. Am. Soc. Brew. Chem. 33: 167, 1975.
- Garza-Ulloa, H., Villareal, R., and Canales, A. M. Further studies of the ferrozine reaction for iron in beer. J. Am. Soc. Brew. Chem. 38: 77, 1980.
- Guidelines for Collaborative Study Procedures. J. Assoc. Off. Anal. Chem. 71: 161, 1988.
- Stookey, L. L. Ferrozine-a new spectrophotometric reagent for iron. Anal. Chem. 42: 779, 1970.