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Determination of sugar alcohols in walnut milk by HILIC-ELSD and its thermal stability
  
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KeyWord:HILIC  ELSD  sugar alcohol  thermal stability
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LI Lulu，YU Jiahao，ZHANG Lianfu，etc  
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Abstract:
      The contents of xylitol, erythritol, sorbitol and maltol in walnut milk were determined by HILIC-ELSD, and the effects of pH and heating time on the thermal stability of the four kinds of sugar alcohols at 121?℃ were investigated.The results showed that the linear range of erythritol and xylitol was 0.08-1.25 mg/mL, the linear range of sorbitol and maltol was 0.05-1.45 mg/mL, the RSD was lower than 3.5% （n=6）, and the recoveries were 96.9%-103.1%. The stabilities of xylitol, erythritol, sorbitol and maltol were good at 121?℃, and heating retention rates were 83.03%-99.72%. The stabilities of the four sugar alcohols increased with the increase of pH, decreased with heating time prolonging, and the thermal stabilities of erythritol, maltol and xylitol were better than that of sorbitol.
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