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1、期待优秀作品投稿，免费分享投稿邮箱：58359487QQ.com开放平等协作分享任何建议、想法、供稿、咨询、购买、合作都可添加我的微信号：fengzhongdeta1979客服电话及企业QQ：4000774300需要什么风格、空间、案例、请回复平台！我们会人工替你查找！感谢你关注我们，一路有你真好 -产品分割线-名师联进入2.0时代！更明细，更便捷！2015年1月更新后硬盘总目录：2TB移动硬盘套餐：1800GB的设计资料，包含我们全部资料，4280元，资料已经更新到2015年1月份最新。现在买套餐，送名师联礼品！分享案例若侵犯了您的权益，请联系我们删除案例被删除请回复对应的日期查看如：201
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3、 500mL mL water bottle; 5mL iodine stock solution, and then diluted to scale and mix. This solution every other day to prepare. 1.1.3 acetate buffer (PH5.3): dissolve 87g sodium acetate (CH3COONa 3H2O) 400mL water and 10.5mL in glacial acetic acid is dissolved in a small amount of water. volume and
4、then mixing the two together and add water to 500mL, using regulation to PH5.3. 1.1.4 0.5mol/L sodium chloride: 14.5 g of sodium chloride dissolved in boiled water, and constant volume to 500mL. 1.1.5 soluble starch: pure before use should determine its value. Accurate said take amount starch (equiv
5、alent to dry state 1g) Yu 250mL high type beaker in the, added 8090mL distilled water, Yu asbestos online in constantly mixing Xia quickly heating to boiling, then with fire keep micro-boiling 3min, stamped and cooling to at room temperature, transfer to 100mL capacity bottle in the, into 40 water b
6、ath in the makes solution reached this temperature, and in 40 Shi with distilled water (40 ) set capacity, this starch solution placed 40 thermostat water bath in the for determination samples with. 1.2 the instrument a) constant temperature water bath: (40+-0.2) 0C. B) spectrophotometer. 1.3 procedures 1.3.1 preparation of samples: weighing 50mL 10G sample