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. 2019 Mar 13;9(15):8230–8238. doi: 10.1039/c9ra00290a

The results of detection of Cr(vi) in river water (n = 3)a.

Sample Found (μM) Added (μM) Total found (μM) Recovery (%) RSD (%)
1 Not detected 0 Not detected
2 Not detected 5 5.13 102.6 1.21
3 Not detected 50 49.68 99.4 1.67
4 Not detected 100 98.18 98.2 2.54
a

RSD: relative standard deviation.