7 Del. Admin. Code § app L § 1124-A-L-2.0

Current through Register Vol. 28, No. 3, September 1, 2024

Section 1124-A-L-2.0 - Sensitivity and Interferences

2.1 Sensitivity. The method is most applicable to measurement of organic carbon above 1 mg/L.

2.2 Interferences. All distilled water used in making or diluting the samples must be acidified with concentrate H₃PO₄ (1 mL of H₃PO₄/1 L of water) and purged with inert gas (He, N₂...) for at least 30 minutes. Inject this water into the Total Organic Carbon analyzer and determine the total concentration (ppm C) of the blank. This method is sufficient for removing most interferences due to inorganic carbon in the water. Do not purge the sample with an inert gas since purging may result in the loss of volatile organic substances.