Therefore, these two solvent systems were compared using HMeucine. As shown in Table II, the counting efficiency with the hyamine-water-dioxane system was comparable to that with the hyamine-toluene system. The solubility of this particular amino acid was almost equal in solvents A and C, B and D, respectively, under the conditions employed. Sample preparation was much easier and faster with the hyaminewater-dioxane system than the hyamine-toluene system. The former did not require the prolonged drying and digestion needed for the hyamine-toluene system. The ratio method (2,7) was applicable to the hyamine-water-di-oxane system for the correction of quenching in determinations of C14, but was not so satisfactory as the use of an internal standard in tritium assays. LITERATURE
CITED(1) Bray, G. A., Anal. Biochem,. 1, 279 (1960).
A liquid chromatographic method using on-line sample cleanup, reverse flow analytical column loading, gradient elution, and postcolumn derivatization with iodine permits direct, rapid determination of aflatoxins B1, B2, G1, and G2, as well as ochratoxin A and zearalenone. Limits of quantitation are 5 ppb for the aflatoxins and ochratoxin A and 30 ppb for zearalenone. This procedure performs well as a multimycotoxin screen for cereal grains and oilseeds, with more limited success in complete animal feeds.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.