Comparison analysis of titrimetric and Spectrometry method for water hardness determination

Abstract

This research has been carried out to compare complexometric titration methods and atomic absorption spectrophotometry in determining water hardness. The complexometric titration method has become the standard method of determining water hardness levels used in various references in several countries. The level of water hardness in several studies is known to be determined by atomic absorption spectrometry method. Both methods have good precision (%RSD ≤ 2%). Accuracy is calculated by repeatability system with the results of %recovery 92.57% for the titrimetric method and 106.99% for the spectrometric method. The results of the t-test for both methods stated that the t-count value (56.89) > t-table value (2.78). This shows that the two methods have significant differences.