The government remains defiant over a consumer group's lab test which found that almost three-quarters of packed rice samples in the market contained methyl bromide - an odourless, colourless gas used as a fumigant to control rice bugs.
Deputy Commerce Minister Yanyong Phuangrach demanded to know what laboratories were commissioned to test the packed rice.
He said that so far only five local labs are accredited to test chemical residues in rice. They are run by the Department of Agriculture, the Department of Rice, the Department of Science Services and the National Bureau of Agricultural Commodity and Food Standards.
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