Common edible preservatives feem ntau muaj xws li cov hauv qab no:
Benzoic acid:
Txheej txheem cej luam: Kuj tseem hu ua benzenecarboxylic acid, nws yog ib qho ntev -tsim cov zaub mov preservative tso cai rau siv nyob rau hauv ntau lub teb chaws.
Yam ntxwv: tshwm li dawb scaly los yog koob -zoo li crystals; sparingly soluble hauv dej tab sis yooj yim soluble hauv ethanol.
Sorbic acid thiab potassium sorbate:
Txheej txheem cej luam: Sorbic acid zoo nkaus li tsis muaj xim -zoo li cov muaju lossis cov hmoov dawb crystalline, thaum poov tshuaj sorbate yog cov poov tshuaj ntsev daim ntawv ntawm sorbic acid.
Cov yam ntxwv: Sorbic acid tsis muaj ntxhiab lossis muaj ntxhiab tsw me ntsis thiab ruaj khov tiv thaiv lub teeb thiab kub; Txawm li cas los xij, ntev raug rau huab cua ua rau oxidation thiab discoloration, txo nws cov preservative efficiency. Potassium sorbate yog heev soluble nyob rau hauv dej nrog rau cov concentrated sucrose thiab saline daws, ua rau nws lug siv nyob rau hauv ntau lawm.
Parabens (p-Hydroxybenzoates):
Txheej txheem cej luam: Kuj tseem hu ua p-hydroxybenzoic acid esters lossis Nipagin esters, cov no yog cov derivatives ntawm benzoic acid. Cov khoom siv feem ntau yog methyl, ethyl, propyl, thiab butyl esters, nrog butyl ester muab cov txiaj ntsig zoo tshaj plaws.
Yam ntxwv: Zoo li cov xim tsis muaj xim me me lossis dawb crystalline hmoov; odorless thiab pib tasteless, tab sis lawv yuav tawm me ntsis astringent aftertaste; sparingly soluble hauv dej tab sis yooj yim soluble hauv cov kuab tshuaj organic xws li ethanol thiab acetone.