| Abstract: | An automated colorimetric method for determining dissolved boron in water is described. The boron is complexed with azomethine H, which is readily available as the condensation product of H acid (8-amino-1-naphthol-3,6-disulfonic acid) and salicylaldehyde. The absorbance of the yellow complex formed is then measured colorimetrically at 410 nm. Interference effects from other dissolved species are minimized by the addition of diethylenetriaminepentaacetic acid (DTPA); however, iron, zinc, and bicarbonate interfere at concentrations above 400 ??g/L, 2000 ??g/L, and 200 mg/L, respectively. The bicarbonate interference can be eliminated by careful acidification of the sample with concentrated HCl to a pH between 5 and 6. Thirty samples per hour can be routinely analyzed over the range of from 10 to 400 ??g/L, boron. |
| Genre: | Article |
| ProdID: | 70012562 |
| Citation Author: | Spencer, R. R.; Erdmann, D. E. |
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| Citation End Page: | 956 |
| Citation Issue: | 8 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental Science & Technology |
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| Citation Number Of Pages: | 3 |
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| Citation Search Results Text: | Azomethine H colorimetric method for determining dissolved boron in water; 1979; Article; Journal; Environmental Science & Technology; Spencer, R. R.; Erdmann, D. E. |
| Citation Start Page: | 954 |
| Citation Volume: | 13 |
| Citation Year: | 1979 |
| Type: | citation/reference |
| Text: | Azomethine H colorimetric method for determining dissolved boron in water; 1979; Article; Journal; Environmental Science & Technology; Spencer, R. R.; Erdmann, D. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1979 00:00 -0600 |
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