| 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 ??mhos cm-1 to 15,000 ??mho 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. ?? 1978. |
| Genre: | Article |
| ProdID: | 70010358 |
| Citation Author: | Eradmann, D. E.; Taylor, H. E. |
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| Citation End Page: | 274 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Analytica Chimica Acta |
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| Citation Number Of Pages: | 6 |
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| Citation Search Results Text: | An automated procedure for the simultaneous determination of specific conductance and pH in natural water samples; 1978; Article; Journal; Analytica Chimica Acta; Eradmann, D. E.; Taylor, H. E. |
| Citation Start Page: | 269 |
| Citation Volume: | 99 |
| Citation Year: | 1978 |
| Type: | citation/reference |
| Text: | An automated procedure for the simultaneous determination of specific conductance and pH in natural water samples; 1978; Article; Journal; Analytica Chimica Acta; Eradmann, D. E.; Taylor, H. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1978 00:00 -0600 |
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