WiththeexpansionofboththecaneandbeetsugarindustriesinChina,thecolourofwhitesugarproducedinthetraditionalChinesefactoryhasincreasedandbecomeacriticalproblem.Thecolourofsugarfromsulphitationistypically150ICUMSAColourUnits(IU).Valuesofupto200IUormorearenotun...[继续阅读]