Octet Comparator For determining total iron (dissolved, suspended and collodial) in natural waters Octet Comparator has color standards representing 0.5, 1.0, 2.0, 3.0, 4.0, 6.0, 8.0 and 10 ppm iron Bipyridyl indicator Sufficient for 100 tests Octet Comparator For determining trace amounts of total...