方案摘要
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参考标准 |
The alkalinity of water is a measure of its capacity to neutralise acids. The alkalinity of natural water is due to the salts of carbonate, bicarbonate, borates, silicates and phosphates along with the hydroxyl ions in free state. However the major portion of the alkalinity in natural waters is caused by hydroxide, carbonate and bicarbonates with may be ranked in order of their association with high pH values. Alkalinity values provide guidance in applying proper doses of chemicals in water and waste water treatment processes, particularly in coagulation and softening.
水浴锅在化妆品中禁用物质三氯乙酸的测定实验中的作用
旋转蒸发仪在化妆品中丙烯腈的测定 气相色谱-质谱法中的作用
pH计在食品中总酸的测定-pH计电位滴定法实验中的作用
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