Comments

[摘要] Lamm and Rosen's paper in this issue compares levels of lead they reported for processed infant formulas in 1971 with those they found in 1972-1973.Their comparison is not valid, since an entirely different method of analysis was used in the present report and the levels cannot be compared. The first levels of lead reported in formulas by Lamm et al. were erroneously high; much lower levels were found at that time by the FDA, by the New York City Department of Health, and by manufacturers of infant formulas. Differences in methods of analysis can give wide discrepancies between findings in various laboratories, especially when only "traces" of a substance are measured.

[学科分类] 儿科学