Provisional standard test method for oil and grease solvent extractable substances in water by gravimetric determination 用重量分析测定法测定水中油和润滑脂
Normally gravimetric method will be used for volumetric determination at the capacity of 20 l or below , whilst volumetric method will be used for measurements above 20 l 重量分析测定法一般用于测定20公升或以下容积的容量,而容积法则用于测定20公升以上容积的容量。
From the measured mass , the volume can be determined with a knowledge of water density and corrections for air buoyancy and thermal expansion of the vessel . the volumetric method requires a standard ( calibrated ) volumetric measure 重量分析测定法测定一个测试量器所载或所出的水的质量。从量得的质量,加上水的密度,空气浮力及容器的热力膨胀修正,便可测定容量。