Research Article
The Use of 7,7′,8,8′-Tetracyanoquinodimethane for the Spectrophotometric Determination of Some Primary Amines Application to Real Water Samples
Table 7
Determination of benzidine in different waters.
| | Water | Benzidine added (μg/mL) | Recovery % of benzidine found per mL of water | | 0.05 | 0.1 | 0.3 | 0.5 | 1.0 | 1.5 |
| | Tap water | 2.5 | 98.3 | 98.3 | 100.0 | 132.2 | 153.2 | 177.4 | | 5.0 | 92.0 | 114.4 | 113.6 | 117.6 | 136.0 | 142.6 | | 10.0 | 101.2 | 101.2 | 102.1 | 102.5 | 104.5 | 114.9 |
| | River water | 2.5 | 100 | 103.3 | 105.0 | 108.3 | 158.3 | 170.0 | | 5.0 | 96.7 | 97.4 | 97.4 | 98.07 | 112.1 | 117.9 | | 10.0 | 92.0 | 94.9 | 113.0 | 119.3 | 121.4 | 123.1 |
| | Sea water | 2.5 | 128.7 | 145.4 | 151.5 | 215.1 | 360.6 | 403.0 | | 5.0 | 106.5 | 129.5 | 209.8 | 255.7 | 362.2 | 394.2 | | 10.0 | 100.0 | 125.7 | 163.0 | 167.8 | 213.7 | 223.6 |
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