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Table 1 Comparison of other methods for the detection of Cr3+

From: Colorimetric detection of Cr3+ based on gold nanoparticles functionalized with 4-mercaptobenzoic acid

MethodsLimit of detection (nM)Detection range (nM)References
Flame atomic absorption spectrometry1238 − 1.1 × 103Chwastowska et al. 2005
Fluorescence1.7 × 104-Panda et al. 2011
Pyridoxal conjugated AuNPs assay11.5 × 1037.5 − 1.3 × 10−5 MBothra et al. 2017
Rhodamine capped AuNPs assay9.3 × 103-Manjubaashini et al. 2018
This colorimetric assay5.0 × 10320 – 25 × 103This work