This study included the development of analytical method for determining
perchlorate in water sample. The analytical condition was referred in EPA 314.0
method which use Ion chromatography and the concentrator column was replaced
by the guard column. Concentrating 10mL raw or treated water sample on to AG16
guard column made it possible to get the LOD(Limit of Detection) of 0.73 ㎍/L. The
total run time was 11 minutes and during run time next sample could be
concentrated on AG16 guard column. Compared to the Concentration method which
needed manual operation, the Direct Injection method could screen the many water
samples. The LOD of the Direct Injection method was higher and the sensitivity
was lower than that of the Concentration method. The RSDs(Relative Standard
Deviations) were lower than 2.5percent for peak height and 0.7percent for retention
time in pre-concentration methods. This method Showed good reproducibility and
reliability and it was thought the deviations of recovery value could be reduced by
considering column capacity and making water sample homogeneous. Matrix Elimination
could be done using the pre-concentration method if perchlorate were in complex matrix
of sample.