. However, strict standards have been set by
the China Health Ministry to monitor its usage, which have been
implemented since 2004. The maximum allowed combined content
of benzoic acid and sorbic acid in soy sauce is 1.0 g/kg (GB/T
5009.29, 2003). Therefore, it is necessary to ensure that low levels
of these preservatives are used in soy sauce to meet regulatory
standards.