Safety Tips for Enjoying Glutinous Rice Dumplings
To commemorate a patriotic poet, Qu Yuan, of the Chu Kingdom who lived around 300 B.C., it is a Chinese tradition to eat glutinous rice dumplings during the Dragon Boat Festival on the 5th day of the fifth month of the Lunar Calendar. The main ingredient of dumpling is glutinous rice, and stuffing to enhance flavour of the dumpling include green bean, pork, salted egg, chestnut, mushroom, bean paste, etc. Glutinous rice dumplings are wrapped by lotus or bamboo leaves.
In the old days, people used to make glutinous rice dumplings themselves to celebrate the Festival. However, the busy city life drives many people to purchase ready-made ones from restaurants, food shops or supermarkets.
Some unscrupulous merchants have been reported to add boric acid into glutinous rice dumplings to prolong their shelf life. The sale of glutinous rice dumplings containing non-permitted preservatives such as boric acid contravenes the Preservatives in Food Regulations (Cap.132BD). Upon conviction, an offender shall be liable to maximum penalty of a fine up to $50,000 and imprisonment for 6 months.
Under the Food Surveillance Programme, health inspectors of the Centre for Food Safety take samples of glutinous rice dumpling from market for chemical and microbiological testing before the Festival to ensure that glutinous rice dumplings sold in Hong Kong are safe for human consumption. The chemical testing is conducted for preservatives (such as boric acid, salicylic acid and benzoic acid), heavy metals (such as arsenic, cadmium and mercury), pesticide residues (such as methamidophos and DDT) and colouring matters (such as Sudan dyes), while the microbiological testing for pathogenic bacteria (such as Salmonella, Staphylococcus aureus and Bacillus cereus).
The public should pay attention to the following safety tips on the purchase, preparation and consumption of glutinous rice dumplings:
- Buy glutinous rice dumplings from reliable retail outlets and don't patronise illegal hawkers;
- Choose rice dumplings that are securely wrapped in wrapping leaves;
- Reheat the rice dumplings thoroughly for at least 15 minutes with the centre temperature at 75 degrees Celsius before consumption.
- Consume the purchased rice dumplings as soon as possible and avoid prolonged storage;
- Store the rice dumplings in the refrigerator at or below four degrees Celsius;
- Discard all leftover rice dumplings if they have been left at room temperature for more than two hours;
- Rice dumplings are generally high in energy and low in dietary fibre. Remember to maintain a balanced diet and avoid over-eating rice dumplings during the Festival. Limit the seasonings added to rice dumplings during consumption.