The Centre for Food Safety has found excessive pesticide residues in a sample of purslane from the Vegetable Marketing Organisation in Cheung Sha Wan.
It was found to contain Dimethoate at a level of 5.2ppm.
According to the Pesticide Residues in Food Regulation, the maximum residue limits for Dimethoate is 1 ppm.
The vendor does not have any remaining stock of the affected batch of purslane.
The centre said consumption of more than 230 grams of the purslane concerned within a short period of time may cause acute adverse health effects, including blurred vision, sweating, vomiting, nausea, abdominal cramps, diarrhoea, breathing difficulties and elevated blood pressure.
It reminded people to prepare vegetables suitably before consumption, including rinsing and soaking them.
