SIMPLE ON-SITE TESTS USING XAD RESIN WITH IMMOBILIZED REAGENT - DETERMINATION OF COPPER AT PARTS-PER-BILLION AND SUB-PARTS-PER-BILLION LEVELS

Simple on-site tests using an XAD resin with immobilized reagent are p roposed. The selectivity may be improved by adding suitable masking ag ents at a certain pH. The high sensitivity is due to the fact that the reaction is taking place at a small, concentrated area. Another advan tage is that simple equipment and small amounts of reagents are used w ith rapid, on-site results. An example of estimating ppb copper is pre sented. (C) 1998 Academic Press.