Quantitative analysis of saccharin in preserved fruits was performed by High Performance Liquid Chromatography （HPLC）. The separation was observed on a reversed phase ODS C）8 column （4.6 × 250 mm）. Mobile ph...Quantitative analysis of saccharin in preserved fruits was performed by High Performance Liquid Chromatography （HPLC）. The separation was observed on a reversed phase ODS C）8 column （4.6 × 250 mm）. Mobile phase system consisted of ammonium acetate buffer： Methanol （60：40 v/v） at a flow rate of 1.0 mL.min^-1, and UV detector was set at 235 nm. The calibration curve of saccharin was linear in the concentration range between 1 to 100 mg·L^-1）, while the detection limit of saccharin was found to be 0.08 mg.L^-1. The mean value of recovery was 98.24% with standard deviation of0.32% （n=12）. The proposed method was successfully applied to determine the amount of saccharin in 12 preserved fruits, commercially available in Chiang Mai local markets. The results showed that the saccharin contents were found in the range of 6.22-78.60 mg.kg^-1.展开更多
Taking Malus pumila Mill, Cv. ‘Jinguan＇ as test matedal, the storage quality of the apples under the different storage conditions of plastic membrane atmosphere storage （MAP）, fruit wax coating, chitosan treatment...Taking Malus pumila Mill, Cv. ‘Jinguan＇ as test matedal, the storage quality of the apples under the different storage conditions of plastic membrane atmosphere storage （MAP）, fruit wax coating, chitosan treatment with different calcium fertilizers were studied. The results showed that different storage modes inhibited the fruit rotting and weight loss, delayed the decrease of fruit hardness and titratable acid content, reduced the soluble solid content, inhibited the degradation of vitamin C. The suitable treatment had good effect on preservation of apple fruits, in which 1% chitosan treatment had the best effect.展开更多
文摘Quantitative analysis of saccharin in preserved fruits was performed by High Performance Liquid Chromatography （HPLC）. The separation was observed on a reversed phase ODS C）8 column （4.6 × 250 mm）. Mobile phase system consisted of ammonium acetate buffer： Methanol （60：40 v/v） at a flow rate of 1.0 mL.min^-1, and UV detector was set at 235 nm. The calibration curve of saccharin was linear in the concentration range between 1 to 100 mg·L^-1）, while the detection limit of saccharin was found to be 0.08 mg.L^-1. The mean value of recovery was 98.24% with standard deviation of0.32% （n=12）. The proposed method was successfully applied to determine the amount of saccharin in 12 preserved fruits, commercially available in Chiang Mai local markets. The results showed that the saccharin contents were found in the range of 6.22-78.60 mg.kg^-1.
基金Supported by Youth Foundation of Ningxia Academy of Agriculture and Forestry Sciences(NKYQ-14-02)New Technology Introduction and Promotion Project of Ningxia Financial Forestry([2014]11)Special Fund of Apple System of Modern Agriculture Industry Technology System(CARS-28)~~
文摘Taking Malus pumila Mill, Cv. ‘Jinguan＇ as test matedal, the storage quality of the apples under the different storage conditions of plastic membrane atmosphere storage （MAP）, fruit wax coating, chitosan treatment with different calcium fertilizers were studied. The results showed that different storage modes inhibited the fruit rotting and weight loss, delayed the decrease of fruit hardness and titratable acid content, reduced the soluble solid content, inhibited the degradation of vitamin C. The suitable treatment had good effect on preservation of apple fruits, in which 1% chitosan treatment had the best effect.
文摘为了探究不同厚度PE膜自发气调包装对李果实采后贮藏期间品质的影响,以蜜橘李果实为试验材料,采用0.01、0.015、0.02、0.025 mm等4种厚度PE膜包装,置于(0±0.5)℃冷库中贮藏,定期测定果实硬度、可溶性固形物含量、可滴定酸含量、气体成分、相对电导率、失重率等指标。结果表明:蜜橘李果实用0.02 mm PE膜包装贮藏效果最佳,O_(2)体积分数维持在13.2%~13.9%,CO_(2)体积分数在2.8%~3.7%;此微环境条件下,果实硬度、可溶性固形物含量和可滴定酸含量下降减缓,相对电导率的增加减缓,重量损失减少,有效保持果实品质,果实贮藏期比对照可延长7 d。
