释义 |
1 ?酸色 ...溶液如何配制 (溴甲酚绿的 0.1%乙醇溶液的体积):(甲基红0.2%乙醇溶液 的体积)=3:1,变色点的PH为5.1,其中 酸色(Acid color) 为酒红,碱色(Base color)为绿色.如果按你给的0.05g/L+0.25g/L( 甲基红+溴甲酚绿)应该7.5:1的比例配.
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Methods: the polysaccharide was extracted with ethanol and the polysaccharide content was wired by UV spectrophotometry phenol -sulfuric acid color method. 方法:采用乙醇浸提法提取多糖,紫外分光光度苯酚-硫酸显色法测定粗多糖含量。 - 2
Methods: color reaction of free amino acids with ninhydrin was adopted, since, in certain extent, the color depth is correlated with the amino acid content. 方法:采用氨基酸的游离氨基与水合茚三酮产生显色反应,在一定范围内,其颜色的深浅与氨基酸的含量成正比。 - 3
In white and color rubber products, add white in the sunlight, insolation, no crack resistance, don't angry, stretching rate and acid and alkali resistant. 在白色和彩色橡胶制品中加入钛白粉,在日光照射下,耐日晒,不开裂、不变色,伸展率大及耐酸碱。
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