The gravity flask method is a simple and commonly used method to measure the density of an object. It calculates the density of an object by comparing the mass ratio and density of the object with water. However, the specific gravity bottle method also has some errors, mainly including the following aspects:

Temperature error: The accuracy of the gravity bottle method is affected by temperature. The higher the temperature, the smaller the density of the liquid, resulting in increased error. Therefore, when measuring by gravity bottle method, attention should be paid to keeping the ambient temperature stable to avoid the influence of temperature on the measurement results.

Accuracy error: The accuracy of the gravity bottle method is affected by the accuracy of the instrument and reading. If the bottle is not made and the reading is not accurate enough, or if the balance is not accurate enough, the error will increase.

Solubility error: If the sample and water are not completely mixed, part of the substance can not be completely dissolved in the water, thus affecting the accuracy of the measurement results.

Bubble error: When the sample is loaded into the specific gravity bottle, if the bubble is not completely removed, it will afError in density measurement by gravity bottle methodfect the measurement results.

Error in density measurement by gravity bottle method

In order to reduce the error of the gravity bottle method, the following measures can be taken:

Temperature control: Keep the ambient temperature stable as far as possible to avoid the influence of temperature on the measurement results during the specific gravity bottle measurement.

Improve accuracy: The use of high precision, accurate reading of the specific gravity bottle and balance, can reduce the instrument error and reading error.

Dissolve the sample: The sample is fully dissolved in water to reduce the solubility error.

Bubble removal: the specific gravity bottle is fully cleaned, and before the sample is loaded into the specific gravity bottle, the specific gravity bottle is fully shaken to eliminate the bubble, which can reduce the bubble error.