About Us | Help Videos | Contact Us | Subscriptions



This article in JEQ

  1. Vol. 22 No. 4, p. 845-850
    Received: Mar 6, 1992

    * Corresponding author(s):
Request Permissions


The Determination of Total Dissolved Inorganic Carbon in Aqueous Solutions

  1. Seth H. Frisbie * and
  2. David R. Bouldin
  1. E NSR Consulting and Engineering, 35 Nagog Park, Acton, MA 01720;
    D ep. of Soil, Crop and Atmospheric Sciences, Cornell Univ., Ithaca, NY 14853.



Experimental results and theoretical considerations were utilized to develop a method for the precise and accurate determination of total dissolved inorganic carbon (TDIC) in aqueous solutions. A method of preparing standard solutions of Cs2CO3 from distilled deionized H2O which was initially stripped of ambient inorganic carbon (IC) with N2(g) at 6.90 × 104 Pa for 20 min allowed a means of calibration without systematic error. For a 0.20-mL sample, a quadratic working range of analysis extended from the limit of detection, 1.05 × 10−5 M IC, to 3.44 × 10−3 M IC. Results are accurate to three significant figures. The smallest R2 observed over 4 yr was 0.997. For 0.05-, 0.10-, and 0.20-mL sample volumes, no significant effect of solution volume on detector response was observed. In order to expedite routine analysis, a means of preparing and storing secondary standard solutions of NaHCO3 for up to 28 d was developed.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .