The boric acid in these food
samples were analyzed by the curcumin-acetic acid method using 2-ethyl-1, 3-hexanediol (EHD)
extraction. Results showed that yellow noodles contained highest concentration of boric acid
throughout the four weeks with a mean of 2.034 μg g−1. In general, the mean concentrations in most
food types were inconsistent throughout the sampling period and were relatively low compared to
studies reported in Peninsular Malaysia. Although it is not a permitted food preservative or additive,
this study showed that local food manufacturers were still using boric acid.