밀도계에 준비된 시료를 3 ml PP 실린지를 이용하여 밀도계의 튜브에 주입한 후 평형상태에 도달하였을 때 밀도를 측정하였다.
After the sample prepared in the density meter was inserted in to the tube for the density meter using a 3 ml PP syringe, the density was measured when the balance state was reached.