Abstract
1248 ANALYST, OCTOBER 1993, VO12. 118 ng ml-l iodide. The iodide comparator standards were prepared by transferring microlitre portions of the iodide standard solution onto pre-cleaned Gelman Sciences GA-6S membrane filters (0.45 pm pore size, 47 mm diameter) placed in pre-cleaned 1.2 ml polyethylene irradiation v