METHOD FOR DETERMINING DENSITY OF SAMPLE WHICH IS AT LEAST VISCOUS AND IS SPECIFICALLY LIQUID

To provide a method for determining density of a sample which is at least viscous and is specifically liquid by using a rotary rheometer.SOLUTION: A rheometer 100 includes: a first measurement unit 7 for containing a sample 12 which is at least viscous and is specifically liquid; and a second measurement unit 8 immersed in the sample 12. The first measurement unit 7 and the second measurement unit 8 are capable of making a relative motion to each other and a second measurement unit 8 has a known volume V. A method includes the steps of: measuring perpendicular resistance between measurement units 7 and 8 after the second measurement unit 8 is immersed in the sample 12, the measured perpendicular resistance corresponding to buoyance between the sample 12 and the second measurement unit 8; and calculating density of the sample 12, using the known volume of the second measurement unit 8 and the measured resistance, on the basis of the principle of Archimedes.SELECTED DRAWING: Figure 1 【課題】少なくとも粘性の、特に液状の試料の密度を、回転式レオメータを用いて判定する方法を提供する。【解決手段】レオメータ１００は、少なくとも粘性の、特に液状の試料１２を収容するための第１の測定部７と、試料１２の中に浸漬される第２の測定部８とを備え、第１の測定部７及び第２の測定部８は、互いに対して相対運動可能であり、第２の測定部８の体積Ｖは既知である。第２の測定部８を試料１２の中に浸漬した後に、測定部７，８の間の垂直抗力を測定するステップであって、測定された垂直抗力は、試料１２と第２の測定部８との間に作用する浮力に相当するステップと、試料１２の密度を、アルキメデスの原理に基づいて、既知の第２の測定部８の体積と測定されたとを用いて算出するステップと、を含む。【選択図】図１