An automated procedure for the simultaneous determination of specific conductance and pH in natural water samples
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Abstract
An automated, continuous-flow system is utilized to determine specific conductance and pH simultaneously in natural waters. A direct electrometric procedure is used to determine values in the range pH 4–9. The specific conductance measurements are made with an electronically modified, commercially available conductivity meter interfaced to a separate module containing the readout control devices and printer. The system is designed to switch ranges automatically to accommodate optimum analysis of widely varying conductances ranging from a few μmhos cm-1 to 15,000 μmho cm-1. Thirty samples per hour can be analyzed. Comparison of manual and automated procedures for 40 samples showed that the average differences were 1.3% for specific conductance and 0.07 units for pH. The relative standard deviation for 25 replicate values for each of five samples was significantly less than 1% for the specific conductance determination; the standard deviation for the pH determination was ⩽ 0.06 pH units.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | An automated procedure for the simultaneous determination of specific conductance and pH in natural water samples |
| Series title | Analytica Chimica Acta |
| DOI | 10.1016/S0003-2670(01)83567-4 |
| Volume | 99 |
| Issue | 2 |
| Year Published | 1978 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | National Research Program - Central Branch |
| Description | 6 p. |
| First page | 269 |
| Last page | 274 |
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