How to deal with the newly bought ceramic tableware can be used after

After buying new porcelain tableware, you can first use boiling water to cook the tableware for a few minutes to kill bacteria, to be cooled naturally, and then add white vinegar soaked in tap water for 2 hours. If the soaking process found that the color of the vinegar water changes, indicating that the heavy metal content of this tableware exceeds the standard, should be immediately discarded, can not be used.