Summit Environmental Technologies prides itself in its expansive testing capabilities in a variety of different fields. To find out if Summit conducts this test, contact us at 330-253-8211 today.
View Actual EPA Method 130.1 (PDF File)
EPA Method 130.1:Total Hardness by Spectrophotometer. Official Name: Hardness, Total (mg/L as CaCO3) (Colorimetric, Automated EDTA)
Summary:The magnesium EDTA exchanges magnesium on an equivalent basis for any calcium and/or other cations to form a more stable EDTA chelate than magnesium. The free magnesium reacts with calmagite at a pH of 10 to give a red-violet complex. Thus, by measuring only magnesium concentration in the final reaction stream, an accurate measurement of total hardness is possible.
Scope:This automated method determines the hardness of drinking, surface, and saline waters. Approximately 12 samples 3 per hour can be analyzed.
Citation:Methods for the Chemical Analysis of Water and Wastes (MCAWW) (EPA/600/4-79/020)
Interferences:None.
QC Requirements:None.
Maximum Holding Time:6 months (MCAWW, Table 1).
Media:WATER
Subcategory:Inorganic
Concentration:10-400 mg/L
Sample Prep:None.
Precision:Precision and accuracy values were calculated using interlaboratory data from EPA-managed Water Pollution (WP) performance evaluation studies.
Detection:None.
Revision Number:Issued 1971