Provisional standard test method for oil and grease solvent extractable substances in water by gravimetric determination 用重量分析測定法測定水中油和潤滑脂
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 重量分析測定法一般用于測定20公升或以下容積的容量,而容積法則用于測定20公升以上容積的容量。
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 重量分析測定法測定一個測試量器所載或所出的水的質(zhì)量。從量得的質(zhì)量,加上水的密度,空氣浮力及容器的熱力膨脹修正,便可測定容量。