高效液氮加注技术对葵花籽油品质和产品包装的影响

Effect of high efficiency liquid nitrogen filling technology on quality and product packaging of sunflower seed oil

采用高效液氮加注技术对葵花籽油进行灌装,并与气氮加注、气液氮混合加注技术进行对比,研究其对葵花籽油品质和产品包装的影响。结果表明:3种充氮方式样品的酸值和过氧化值变化趋势基本一致;液氮加注样品常温储藏5个月后酸值(KOH)和过氧化值分别为0.07 mg/g和1.45 mmol/kg,与常温储藏相比,液氮加注样品45℃储藏5个月后酸值无差别,过氧化值稍有降低,为1.30 mmol/kg;液氮加注和气液氮混合加注样品初始及储藏过程中的过氧化值比气氮加注样品的稍高;常温下3种充氮方式样品的初始残氧值相差不大,但储藏过程中液氮加注和气液氮混合加注样品的残氧值明显低于气氮加注样品;常温下液氮加注样品瓶内存在正压,其满瓶抗压能力优于气氮加注和气液氮混合加注样品。

High efficiency liquid nitrogen filling technology was used to fill sunflower seed oil,and it was compared with gas nitrogen filling and gas-liquid nitrogen mixed filling technology.The effects of nitrogen filling method on quality and product packaging of sunflower seed oil were studied.The results showed that the change trends of acid value and peroxide value of the samples with three nitrogen filling methods were basically the same.The acid value and peroxide value of liquid nitrogen filling samples were 0.07 mgKOH/g and 1.45 mmol/kg respectively after five months storage at room temperature.Compared with room temperature storage,the acid value of liquid nitrogen filling samples after five months storge at 45℃had little difference,while the peroxide value decreased slightly to 1.30 mmol/kg.The peroxide values of liquid nitrogen filling samples and gas-liquid nitrogen mixed filling samples during initial and storage were slightly higher than that of gas nitrogen filling samples.There was little difference in initial residual oxygen values of three nitrogen filling samples,but the residual oxygen values of liquid nitrogen filling samples and gas-liquid nitrogen mixed filling samples during storage were significantly lower than that of gas nitrogen filling samples.There was positive pressure in the bottle of liquid nitrogen filling sample,and its full bottle compression capacity was better than that of gas nitrogen and gas-liquid nitrogen mixed filling samples.