The selectivities were not good for AACK with RE, Th and Bi, but pretty good with Ca, so AACK could be an excellent reagent for the spectrophotometric determination of calcium.

• AACK与稀土、钍、铋显色的选择性欠佳，与钙显色的选择性较好，故可作为测定钙的优良试剂。