1.A separate volume of the substance is a characteristic of the density of the substance, This quantity was measured by trade between the mass m of the substance he (pure) and the volume V of the object.
The formula: D = m/V
2.The proportion of the is the ratio between the mass of the substance in the private versus private mass of water at the temperature according to fixed standards. For as: TCVN :15theC , According to ASTM : 15.6the C ...
The formula computes the proportion:
RD = ρchât/ ρwater
in that ρthe substance is the mass of the substance's own need to measure and ρwater of standard substance (confronting nature).
3.Measuring method of simple substances
There are quite a lot of measuring method with the pros, various blemishes. Depending on the required accuracy, laboratory conditions ... which the user can choose for themselves was one of the methods of measuring the gravity suit her:
+ Hydrometer
+ The average measured gravity
+ Gravity measurement Kit
+ Measuring the proportion of
Premium comparison, disadvantages of the method of measuring the proportion below will show us how to look at an overview of measurement method:
|
Method Comparison criteria |
Hydrometer |
The average proportion |
Proportion Kit |
Measuring the proportion of |
|
Description of methods |
Is glass tools, divided 2 section (measuring scale, atmosphere).When the hydrometer into the liquid drop need to measure and to stability in the solution will scale with the response of the hydrometer. The proportion of higher the hydrometer sample more. |
Is the glass jars are the norm and calibrated in volume which in standard conditions. The average will have a mass M1, When the correct form will process a full magnet has mass M2. Spread of M1 and M2 is the mass of the sample. And it is divided by the volume of comments to out of form. |
Use a gravity Kit balance analytical.Object model will be loss of up in the air and has a weight of M1, the next model will be loss of solvent environment ( water, ethanol,..) by acsimet of thrust will produce a mass M2. Spread of commands of the M1, M2 will be divided by the volume of liquid to out gravity model |
The machine will have a hollow glass tube oscillate at a certain frequency. This frequency will change when the tube is filled with sample: the volume over a smaller frequency. This frequency is measured and converted to a proportion of the. The proportion of the calibration is done in air and distilled water. Thermostat will control the temperature closely without using hot heat stabilizers |
|
Complexity measurement |
Simple |
Simple |
Simple |
Complex |
|
Time for results |
Fast |
Relatively fast |
Fast |
Fast |
|
The price |
Low cost |
Low cost |
Expensive |
Expensive |
|
Nature of samples measure |
Direct read is% alcohol, %the road (BRIX)…. |
Direct read is% alcohol, %the road (BRIX)…. |
Measure the proportion of solid porous material |
Liquid |
|
The downside |
– Thermometers comes the long difficult – The fragile glass – Small measuring range – Results skewed relative – Sample volume needed greater – Difficult to potty |
– The fragile glass – Large sample volume |
– Sample volume needed greater. – Long thermometer causes stress |
– Expensive |
II, The average measured gravity 50 100 25 ml | The average proportion of the thermometers with LMS Germany
The average proportion of LMS Germany produced based on DIN ISO standards 3507 (for the average proportion), the product is understood as the standard method of (calibration In ) to give the most accurate volume of the average temperature in the standard with the standard form (distilled water). When the calibration is finished, above the stems vase carved up the numbers, It is the volume of the jar with the error than the fact of identifying values.
Each of the average proportion was designed exclusively for each other should be above the average and the lid are numbered identically to not be confused between the peace and cause distortions in the process of weight and measure the proportion of the
All material is made up of the average measured proportion of borosilicate is pycrometer 3.3 (best glass material with superior durability) , and the color ink is printed up in the high temperature will keep the word durable with a bad environment.
Parameter for the average proportion of Gay-Lussac
|
Coolant( ml) |
Package( the) |
Product code |
|
Yet the calibration |
||
|
1 |
2 |
61 372 100 |
|
2 |
2 |
61 372 101 |
|
5 |
2 |
61 372 102 |
|
10 |
2 |
61 372 103 |
|
25 |
2 |
61 372 104 |
|
50 |
2 |
61 372 105 |
|
100 |
2 |
61 372 106 |
|
Calibrated |
||
|
1 |
2 |
61 372 110 |
|
2 |
2 |
61 372 111 |
|
5 |
2 |
61 372 112 |
|
10 |
2 |
61 372 113 |
|
25 |
2 |
61 372 114 |
|
50 |
2 |
61 372 115 |
|
100 |
2 |
61 372 116 |
|
Calibrated and certified |
||
|
1 |
2 |
61 372 130 |
|
2 |
2 |
61 372 131 |
|
5 |
2 |
61 372 132 |
|
10 |
2 |
61 372 133 |
|
25 |
2 |
61 372 134 |
|
50 |
2 |
61 372 135 |
|
100 |
2 |
61 372 136 |
Parameter for the average proportion of the thermometer that came.
|
Coolant (ml) |
Package(The). |
Product code |
|
Not yet the calibration |
||
|
10 |
2 |
61 372 303 |
|
25 |
2 |
61 372 304 |
|
50 |
2 |
61 372 305 |
|
100 |
2 |
61 372 306 |
|
Calibration was |
||
|
10 |
2 |
61 372 313 |
|
25 |
2 |
61 372 314 |
|
50 |
2 |
61 372 315 |
|
100 |
2 |
61 372 316 |
|
Calibrated and there comes the certificate |
||
|
10 |
2 |
61 372 323 |
|
25 |
2 |
61 372 324 |
|
50 |
2 |
61 372 325 |
|
100 |
2 |
61 372 326 |
Link reference video:
Measure the proportion by weight kit
How to measure gravity by hydrometer | alcoholometer.:
Measuring gravity by instruments of:
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