Objective To establish a simple and rapid method for mercury ion detection.
Methods Variations of D660nm/D530nm before and after adding mercury ion were compared through the spectroscopy of colloidal gold and DNA system which was scanned with a spectrophotometer to determine the content of mercury ion.
Results The linear range of this method was 0.1-2.0 μg/L, the correlation coefficient (r) was 0.995, and the detection limit was 0.2 μg/kg.
Conclusion The method based on colloidal gold and DNA system is simple and rapid for mercury ion detection in food.
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