2024年7月18日 星期一 19:43:55

马铃薯制试剂用淀粉

      利用马铃薯,可制得试剂用淀粉,成本低,经济效益高。
      制作方法
      1.洗涤及制薯浆:用水将马铃薯洗2~3遍,除尽全部泥砂,并将有锄伤、烂洞的薯块削除。开动粉碎机,投入洗净的薯块,立即流出薯浆。因鲜马铃薯本身约含75%的水分,故打浆时不须外加水。
      2.滤粉及淀粉漂洗:用机器或人工将薯浆过滤,淀粉乳(含淀粉的水)贮于池内澄清。待池内淀粉沉底后,放去上层水,取出粉块,放在陶土缸中,加清水搅拌。淀粉澄清后,倾去上层液体,刮除黄粉,再加清水搅拌,用100~140目的筛除去杂质。反复加清水漂洗,至上层水清亮为止。
      3.淀粉水解:水解之前,将清水放入水解池,接通电源,将水加热到40~50℃,再放入洗净的陶土缸中,按配料表将酸、水、湿淀粉计量投入缸内进行水解。水解过程随时搅拌,经化验合格后出缸。
      4.洗酸:将水解合格的淀粉乳用塑料盆取出,倒入预先加有半缸清水的陶土缸中,再将缸加满清水,使料液温度迅速降低,防止转化为糊精。淀粉澄底后,倾去上层酸液,加清水反复漂洗至中性(用pH试纸控制)。过100~140目筛除去杂质。用蒸馏水洗至氯化物含量合格(约2~3遍)。
      5.烘干磨细:漂洗合格后,倾去上层清液,取出粉块捣碎,放在铺有白布的板上,进烘干室干燥。烘烤初期,温度控制在40~50℃,待大部分水烘除后,可逐步升高温度。烘干过程中随时翻动捣碎,约20小时后取出。用磨粉机磨碎,筛除杂质,再烘烤数小时,至装入干燥玻璃瓶中抖动时无粘结感,取出冷却,取样化验。
      6.包装:磨细复烘的产品,用预先洗净的650~750毫升棕色螺口玻璃瓶分装,每瓶装500克。盖上塑料内外盖,瓶口套封口。化验合格后贴上相应等级的瓶签,装入特制纸箱,每箱10瓶。

 

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