CN106885756B - Material density measuring method - Google Patents
Material density measuring method Download PDFInfo
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- CN106885756B CN106885756B CN201510945305.4A CN201510945305A CN106885756B CN 106885756 B CN106885756 B CN 106885756B CN 201510945305 A CN201510945305 A CN 201510945305A CN 106885756 B CN106885756 B CN 106885756B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
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Abstract
The invention discloses a kind of Material density measuring methods.The Material density measuring method includes the following steps: to take two to draw the density pipe that titer is cleaned and dried, weighs to density pipe, be denoted as M0；15 DEG C -17 DEG C of titer and the Material of metric density to be measured are separately filled in the tube body of two density pipes, cover pipe close and water-bath, the liquid level of water-bath is lower than the nozzle of tube body, the temperature of water-bath is higher than the original temperature of titer and Material, water-bath 0.5h-1h wipes the liquid overflowed out of pipe close overflow channel away, takes out density pipe, it weighs after wiping the liquid of dry outer wall, the weight of the density pipe after injecting titer is denoted as M1, the weight of density pipe after injecting Material is denoted as M2；Calculate the relative density of the Material in preset temperature: D=(M2‑M0)/(M1‑M0)*ρ0.Material density measuring method of the invention can the density directly to the sticky Materials steeped more carry out precise measurement, measurement is accurately and conveniently.
Description
Technical field
The present invention relates to density measure fields, more particularly to a kind of Material density measuring method.
Background technique
The method of the density measure of flowing material has density agar diffusion method, density bottle method and densimeter measurement method at present.It is wherein close
Degree agar diffusion method can measure the density of more sticky Material, but accuracy is not high；Density bottle method has thermometer, knot because of density bottle
Structure is ingenious in design, can relatively accurately measure the density of easily flowing Material；And densimeter method, it can be convenient and fast accurately measure
The density of low viscosity fluid, but densitometer instrument price is expensive.Three kinds of test methods have a common problem not can solve, i.e.,
It is difficult to that the density value of the sticky Materials steeped is accomplished accurately to measure more.
Summary of the invention
Based on this, it is necessary to provide it is a kind of can the density quickly to the sticky Materials steeped more carry out precise measurement Material it is close
Spend measurement method.
A kind of Material density measuring method, includes the following steps:
(1) two density pipes, the density pipe, including tube body and pipe close are taken；One end closure of tube body forms closing
End, the other end are open to form open end, and the internal diameter of the open end is gradually increased from the inside to the outside, and the inner wall of the open end is in mill
Sand shape；The outer wall of the pipe close is in frosted shape, the size of the pipe close outer wall by one end to opposite one end be gradually reduced with
It is matched with the open end in sealing, the pipe close is overflowed with the bubble and/or Material being used for for Material in the tube body
Overflow channel, the overflow channel run through the both ends of the pipe close, when the pipe close is matched with the open end, the spilling
Channel it is open at one end toward in the tube body, another end opening is toward outside the tube body；
The tube body and pipe close are cleaned, dried；It weighs to density pipe described in every, the weight of the density pipe
It is denoted as M0；
(2) full titer is filled in the tube body of the wherein one density pipe, is covered the pipe close, will be infused titer
The density pipe is placed in isoperibol afterwards, and the temperature of isoperibol is higher than the original temperature of the titer in density pipe, is wiped away
The titer overflowed out of the pipe close overflow channel takes out the density pipe, weighs after wiping the liquid of dry outer wall, note
The weight of the density pipe after titer is denoted as M1；
(3) Material of density to be measured is filled in the tube body of another Zhi Suoshu density pipe, is centrifuged, and Material table is removed
The more Material layer of face bubbles, covers the pipe close, and the density pipe for injecting Material is placed in the isoperibol, is wiped
The Material overflowed out of the pipe close overflow channel is gone, the density pipe is taken out, weighs after wiping the liquid of dry outer wall, is infused
The weight of the density pipe after entering Material is denoted as M2；
(4) relative density of the Material in preset temperature is calculated:
D=(M2-M0)/(M1-M0)*ρ0, wherein ρ0For the density of the titer.
In one of the embodiments, the Material in step (3) after centrifugation, when the liquid level of Material is lower than the pipe close
It is lower along when, then supplement Material to filling the tube body, centrifugal treating again under identical centrifugal condition.
The tube body and the pipe close are cleaned with titer in step (1) in one of the embodiments, after cleaning
The tube body and the pipe close, naturally dry.
The tube body and the pipe close are cleaned with titer in step (1) in one of the embodiments, use volume
The alcohol that score is 95% sprays, then is quickly dried up with 50 DEG C -60 DEG C of hot wind.
The isoperibol uses water-bath in one of the embodiments, and when water-bath, the liquid level of water-bath is lower than the tube body
Nozzle, the temperature of water-bath is higher than the original temperature of the titer in density pipe.
Condition when being centrifuged in one of the embodiments, are as follows: 3000r/min-4000r/min is centrifuged 5min-10min.
The density pipe further includes cock cap in one of the embodiments, filled in two tube bodies full titer and
After the Material, the cock cap and the cock cap are covered, and institute two is stated into density pipe and is placed in the isoperibol.
According to analysis, cause the density measure error of toughness Material is biggish main reason is that such Material was producing
Sample is easily mixed into more air, and the side of the not easy-to-use heating of mixed air during loading in journey or toward density measuring equipment
Formula removes.These air occupy the segment space of density bottle and volume size is indefinite, and the measurement result for eventually leading to density is inclined
Difference is larger.The liquid product produced at present by national standard code requirement use density bottle method, this method to general aqua, wash
Accurate measurement data can be obtained in the product for washing the lower viscosity such as class, but more sticky to hair moisturizer, gel, facial mask etc.
Product then measures more difficult, shows as being measured in parallel that deviation is larger, and measurement result is insincere.
Material density measuring method of the present invention is provided with density pipe, is used to contain Material to be centrifuged in tube body,
The open end internal diameter of tube body is gradually increased from the inside to the outside, and Material is filled in addition to tube body in which can be convenient.It is of the present invention
The internal diameter of density pipe, open end is gradually increased from the inside to the outside, rather than the mode increased again that becomes smaller that first closes up of existing density pipe,
The purpose that the internal diameter of open end is gradually increased from the inside to the outside is to be conducive to expect that intracorporal bubble thoroughly overflows in centrifugation in tube body
Out to more than liquid level, without still there is residual in Material.Material is handled in tube body by low-speed centrifugal, the sky in Material
Gas can quickly thoroughly be spilled over to ullage out of Material, and the density pipe being related to can will expect that intracorporal bubble is thorough in a short time
The removing at bottom is clean, and is expelled to outside pipe, effectively eliminates the bubble in Material by density pipe, at the same because of centrifugal treating after
Material is not required to transfer directly by density pipe for density measure, avoids the air that secondary operation may be brought into.Centrifugation disappears
The Material being disposed is steeped, pipe close is covered, and after defined time and thermostat temperature processing, wipes away and overflows Material and outside tube water
Part, and cock cap is screwed on, last precision weighing simultaneously calculates.Through repeatedly on probation, the results showed that this method is relatively close to toughness product
The measurement relative deviation of degree is smaller, measurement accuracy is high, and makes needed for entirely detecting because eliminating conventional foam time (> 12h)
Time greatly reduces (single sample can be controlled in detection in 1h)；Simultaneously because density pipe volume is small, in the license of density pipe quantity
In the case of disposable sample quantity up to 36 or more.Material density measuring method of the present invention is guaranteeing measurement accuracy
While detection working efficiency be also greatly improved.
Detailed description of the invention
Fig. 1 is one embodiment of the invention density pipe side cross sectional views.
Description of symbols
10, density pipe；100, tube body；110, closed end；120, open end；130, boss；200, pipe close；210, it seals
Portion；211, recessing groove；220, interconnecting piece；230, overflow channel；240, annular groove；300, cock cap；310, air hole.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
Shown in Figure 1, present embodiment discloses a kind of density pipes 10.The density pipe 10 includes tube body 100, pipe close 200
And cock cap 300.The material of the tube body 100 of the density pipe 10 that the present embodiment is related to, pipe close 200 and cock cap 300 can be glass
Glass material, stainless steel material or rigid plastics material；It is preferred that glass material or stainless steel material, more preferable coloured glaze material.
Shown in Figure 1,100 1 end closure of tube body forms closed end 110, and the other end is open to form open end 120.Tube body
From the bottom to top, bore increases gradually for 100 middle and lower part, and closed end 110 is in hollow hemisphere shape namely the outer wall of closed end 110
In round and smooth curved.The internal diameter of open end 120 is gradually increased from the inside to the outside, and the inner wall of open end 120 is in frosted shape.
Shown in Figure 1, the size of 200 periphery wall of pipe close is gradually reduced by one end to opposite one end, and pipe close 200 cooperates
In open end 120, pipe close 200 is engaged with open end 120 to be sealed open end 120 by pipe close 200.Tube body 100 leans on
The inner wall of nearly open end 120 has a boss 130, and the outer wall rounding off of boss 130 is to the inner wall of tube body 100.
Shown in Figure 1, pipe close 200 has the overflow channel 230 that the bubble for Material in tube body 100 overflows, and overflows
Channel 230 is open at one end toward in tube body 100, and another end opening is toward outside tube body 100.The internal diameter ruler of overflow channel 230
It is very little by toward one end in tube body 100 to being gradually reduced towards the other end outside pipe, the setting of the construction is convenient in tube body 100
Material expanded by heating when, Material can move smoothly through overflow channel 230 outflow.
Shown in Figure 1, in the present embodiment, pipe close 200 includes the sealing 210 and use for sealing open end 120
In the interconnecting piece 220 of connection cock cap 300.Sealing 210 is connect with interconnecting piece 220.Overflow channel 230 is open at one end in planar ends
End face, the other end is opened on the end face at back taper end.
The periphery wall concave shape cyclization connected in star 240 of interconnecting piece 220 and 210 junction of sealing.Except setting is except reduction pipe
Outside the material quantity and weight of plug, manpower operation of being more convenient for is affectedly bashful, and the partial skin of finger can enter annular groove 240
It is interior, it has an effect convenient for finger and is affectedly bashful interconnecting piece 220, entire pipe close 200 is extracted out of tube body 100, or pipe close 200 is filled in
In tube body 100 and tighten.
Overflow channel 230 runs through sealing 210 and interconnecting piece 220.The axis of overflow channel 230 and the axis of tube body 100
In parallel.
Shown in Figure 1, the end face of interconnecting piece 220 outwardly is in planar so that the end forms planar ends.Planar ends periphery
The size of wall close to one end of tube body 100 to one end far from tube body 100 by being gradually reduced.Sealing 210 is towards in tube body 100
End face it is tapered so that the end forms tapered end, 200 lower part of pipe close design for back taper, 150 degree -170 of cone angle is spent, and is bored
Edge rounding off.End face in an inverted cone is set in the end of the sealing 210 of pipe close 200, this end face is convenient in tube body 100
Material in constant temperature Material overflowed naturally by overflow channel 230 is smooth.The marginal trough of the end face of tapered end, which is formed, steps down
Slot 211.
Shown in Figure 1, the periphery wall size of sealing 210 outside tube body 100 to interior by being gradually reduced.Sealing 210
Periphery wall is in frosted shape.Sealing 210 and the inner wall of open end 120 are engaged.When pipe close 200 is matched with open end 120, allow
Position slot 211 is engaged with boss 130.Recessing groove 211 be engaged with boss 130 so that sealing 210 and tube body 100 it is interior
Wall closely cooperates and contacts, and enables the opening portion of the tightly sealed tube body 100 of sealing 210, avoids leakage.?
The periphery wall of sealing 210 and the inner wall of open end 120 are arranged to frosted shape, so that the periphery wall and opening of sealing 210
The inner wall at end 120 is fitted close, and avoids leakage.
Shown in Figure 1, the size of 300 lower openings inner wall of cock cap is gradually increased from the inside to the outside.The periphery of connecting pin 220
Wall is in frosted shape, and the lower openings inner wall of cock cap 300 is in frosted shape.Cock cap 300 matches connection with the planar ends of interconnecting piece 220,
Namely it is engaged.Be arranged to frosted shape in the periphery wall of interconnecting piece 220 and the inner wall of cock cap 300 so that interconnecting piece 220 with
Cock cap 300 is fitted close, and avoids leakage.Cock cap 300 is to be based on accurately controlling issuable material when Material is overflowed in pipe
The weight loss of body and moisture content.
Cock cap 300 covers the opening of overflow channel 230 outwardly, and cock cap 300 and pipe close 200 are surrounded and overflowed for accommodating
The accommodating cavity of Material.There is air hole 310 on cock cap 300.Air hole 310 and overflow channel 230 are toward 300 one end of cock cap
Opening offset distribution.There are air holes 310 on cock cap 300, convenient to communicate with outside atmosphere, for balancing inside and outside cock cap 300
Pressure, convenient for the spilling of the air in cock cap 300.
The density pipe 10 of the present embodiment, when pipe close 200 fills in the open end of tube body 100, sealing 210 is located at tube body
In 100 open end 120, interconnecting piece 220 is located at the marginal position of open end 120 or more, and annular groove 240 also is located at out
More than the marginal position at mouth end 120, convenient for being affectedly bashful for manpower.
Density pipe 10 of the present invention is when being used for Material density measure, the Material density measuring method being related to, packet
Include following steps:
(1) two density pipes 10 are taken, tube body 100 and pipe close 200 are cleaned with titer, dried, it is described after cleaning
Tube body 100 and the pipe close 200, naturally dry；Or after being sprayed with volume fraction for 95% alcohol, then 50 DEG C -60 DEG C
Hot blast drying；It weighs to density pipe 10 described in every, the weight of the density pipe 10 is denoted as M0；
(2) full titer is filled in the tube body 100 of the wherein one density pipe 10, covers the pipe close 200, it will
The density pipe 10 is placed in isoperibol after water filling, and the temperature of isoperibol is higher than the original temperature of the titer in density pipe
Degree, the isoperibol uses water-bath, and when water-bath, the liquid level of water-bath is lower than the nozzle of the tube body, and the temperature of water-bath is higher than close
Spend the original temperature of the titer in pipe 10.It wipes the titer overflowed out of the pipe close 200 overflow channel 230 away, takes out
The density pipe 10 wipes the liquid of dry outer wall and weighs after covering cock cap 300, the weight of the density pipe 10 after water filling
It is denoted as M1；
(3) Material of density to be measured, 3000r/min- are filled in the tube body 100 of another Zhi Suoshu density pipe 10
4000r/min is centrifuged 5min-10min, the more feed liquid layer of removal Material surface bubbles, when the liquid level of Material is lower than the pipe
When 130 position of boss of body 100, then Material is supplemented to filling the tube body 100, centrifugal treating again under identical centrifugal condition.
The pipe close 200 is covered, the density pipe 10 for injecting Material is placed in the isoperibol, is wiped away from the pipe close 200
Overflow channel 230 in overflow Material, take out the density pipe 10, wipe the moisture content of dry outer wall and claimed after covering cock cap
The weight of weight, the density pipe 10 after injecting Material is denoted as M2；
(4) relative density of the Material in preset temperature is calculated:
D=(M2-M0)/(M1-M0)*ρ0, wherein ρ0For the density of the titer predetermined temperature, unit g/mL.
When below using Material density measure of the density pipe 10 of the present invention at a temperature of for 13 DEG C -16 DEG C, relate to
And the Material density measuring method arrived, include the following steps:
(1) two density pipes 10 are taken, the tube body 100 of the density pipe 10 and pipe close 200, cock cap 300 are used into standard
Liquid is cleaned, naturally dry.In the present embodiment, deionized water can be used in titer.Or with volume fraction be 95% alcohol
Tube body 100 and pipe close 200, the cock cap 300 for spraying the density pipe 10 are primary or repeatedly, then with 50 DEG C -60 DEG C of hot wind
Quickly drying.It weighs to density pipe 10 described in every (containing tube body 100, pipe close 200 and cock cap 300), the density pipe 10
Weight be denoted as M0。
(2) 15 DEG C -17 DEG C of mark is filled in the tube body 100 of a density pipe 10 (No. 1 can be denoted as) wherein
Quasi- liquid covers the pipe close 200, and density pipe 10 described after water filling is placed in isoperibol, and the temperature of isoperibol is higher than close
Spend the original temperature of the titer in pipe 10.In the present embodiment, isoperibol can use water-bath, and the liquid level of water-bath is lower than institute
State the nozzle of tube body 100.The temperature of water-bath is (20 ± 0.2) DEG C, and the temperature of water-bath is higher than the original temperature of titer.When water-bath
Between be 0.5h-1h, wipe the titer overflowed out of the pipe close 200 overflow channel 230 away, take out the density pipe 10, wipe
The liquid of 10 outer wall of dry density pipe is simultaneously weighed after covering cock cap, and the weight of the density pipe 10 after water filling is denoted as M1。
(3) 13 DEG C -16 DEG C to be measured is filled in the tube body 100 of another Zhi Suoshu density pipe 10 (No. 2 can be denoted as)
The Material of metric density, 3000r/mi-4000r/min are centrifuged 5min-10min, the more feed liquid layer of removal Material surface bubbles.
When position of the liquid level of Material lower than the boss 130 of the tube body 100, then Material is supplemented to filling the tube body 100, it is identical
Under the conditions of centrifugal treating again.The pipe close 200 is covered, the density pipe 10 for injecting Material is placed in isoperibol, it is permanent
The temperature of warm environment is higher than the original temperature of the titer in density pipe 10.In the present embodiment, isoperibol can use water
Bath, water bath processing condition is identical as the density pipe 10 of water filling, wipes away and overflows out of the pipe close 200 overflow channel 230
Material, take out the density pipe 10, wipe the liquid of dry outer wall and weigh after covering cock cap 300, inject Material after institute
The weight for stating density pipe 10 is denoted as M2。
(4) relative density (unit: g/mL) of the Material in preset temperature is calculated:
D=(M2-M0)/(M1-M0)*ρ0, wherein ρ0For the density of the titer, in the present embodiment, titer is used
Deionized water, deionized water ρ at 20 DEG C0It is 0.99823.
Above-mentioned same method can measure Material in the density value of other temperature spots, and wherein the temperature of isoperibol must be high
In the temperature spot of Material, and temperature of the titer before injecting tube body is also required to the temperature less than isoperibol.In addition, to guarantee
The precision of measurement can be tested in parallel under three density pipe similarity conditions, as a result remember average value.
Density pipe 10 of the present invention when in use, in the measurement for Material density, can select tube body 100 and
Pipe close 200 cooperatively forms common density pipe.When the precise measurement for Material density, tube body 100, pipe close 200 can be selected
And cock cap 300 cooperatively forms accurate density pipe, the setting of cock cap 300 avoids the loss and reduction that Material is overflowed in tube body 100
The volatilization of moisture content, to accurately control because Material overflows loss in tube body 100 and the lost measurement that may cause of moisture content misses
Difference.
Contrast test one
The detection of makeup water density, temperature control (20 ± 0.2) DEG C, density unit: g/mL.
Toner is being obtained by accurate density pipe, common density pipe using the Material density measuring method in the present embodiment
Density value compared with the density value obtained using density bottle, density cup and densitometer, ginseng is shown in Table 1.
Table 1
| Test serial number | Embodiment 1 | Embodiment 2 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Testing tool | Accurate density pipe | Common density pipe | Density bottle | Density cup | Densitometer |
| Measurement is for the first time | 1.0126 | 1.0121 | 1.0125 | 1.0127 | 1.0123 |
| Second of measurement | 1.0122 | 1.0126 | 1.0121 | 1.0120 | 1.0121 |
| Measurement third time | 1.0124 | 1.0123 | 1.0122 | 1.0121 | 1.0123 |
| It measures the 4th time | 1.0120 | 1.0119 | 1.0121 | 1.0122 | 1.0120 |
| It measures the 5th time | 1.0122 | 1.0118 | 1.0119 | 1.0120 | 1.0122 |
| It measures the 6th time | 1.0120 | 1.0120 | 1.0120 | 1.0120 | 1.0120 |
| It measures the 7th time | 1.0119 | 1.0121 | 1.0119 | 1.0117 | 1.0119 |
| It measures the 8th time | 1.0126 | 1.0127 | 1.0124 | 1.0125 | 1.0124 |
| It measures the 9th time | 1.0123 | 1.0122 | 1.0122 | 1.0124 | 1.0123 |
| It measures the tenth time | 1.0121 | 1.0120 | 1.0123 | 1.0118 | 1.0121 |
| Average value | 1.0122 | 1.0122 | 1.0122 | 1.0121 | 1.0122 |
| Maximum value | 1.0126 | 1.0127 | 1.0125 | 1.0127 | 1.0124 |
| Minimum value | 1.0119 | 1.0118 | 1.0119 | 1.0117 | 1.0119 |
| Absolute deviation values | 0.0007 | 0.0009 | 0.0006 | 0.0010 | 0.0005 |
| Relative deviation ratio | 0.69 | 0.89 | 0.59 | 0.99 | 0.49 |
Toner Material viscosity (viscosity number 50mpa.s-800mpa.s under room temperature) is lower, and the bubble in Material is easy to
Voluntarily spill on liquid level, therefore which kind of ineffective test method on the whole, higher precision is shown, acceptable
In range.In contrast, such Material densimeter measurement precision highest, followed by density bottle and accurate density pipe measurement.
Contrast test two
The detection of shampoo density, temperature control (20 ± 0.2) DEG C, density unit: g/mL.
Shampoo is being obtained by accurate density pipe, common density pipe using the Material density measuring method in the present embodiment
Density value compared with the density value obtained using density bottle, density cup and densitometer, ginseng is shown in Table 2.
Table 2
Generally in the range of 2000mpa.s-20000mpa.s, air generally needs the Material viscosity number of shampoo after entering
The bubble of Material could be preferably eliminated after (40 DEG C, about need 8h-24h) of the heat preservation processing of long period.It is to have been subjected to disappear above
The detection of treated sample shows to show higher accuracy value with accurate density pipe and density bottle, common density pipe and
Density cup measurement accuracy is slightly worse.
Contrast test three
The detection of skin care cream density, temperature control (20 ± 0.2) DEG C, density unit: g/mL.
Skin care cream is being obtained by accurate density pipe, common density pipe using the Material density measuring method in the present embodiment
Compared with the density value obtained using density bottle, density cup and densitometer, ginseng is shown in Table 3 density value out.
Table 3
The general viscosity of skin care cream is larger (viscosity number 30Wmpa.s-100Wmpa.s), using constant temperature (40 DEG C, 8h-
Defoaming is highly difficult naturally for 24 hours), and densitometer is even more directly to use.It is detected, is shown larger with density bottle and density agar diffusion method
Deviation.And with accurate density pipe and common density pipe, show higher measurement accuracy.
Contrast test four
The detection of skin care gel density, equal temperature control (20 ± 0.2) DEG C, density unit: g/mL.
Skin care gel is being obtained by accurate density pipe, common density pipe using the Material density measuring method in the present embodiment
Compared with the density value obtained using density bottle, density cup and densitometer, ginseng is shown in Table 4 density value out.
Table 4
The gel-like raw material of larger proportion is added therefore the very big (viscosity of its viscosity in skin care gel class cosmetics when production
Value 80Wmpa.s-200Wmpa.s), it is defoamed naturally using constant temperature (40 DEG C, 8h-24h) substantially without effect, density bottle and density
Cup shows biggish deviation, and densitometer is even more directly to use.And detected with centrifugal pipe process, because facilitating using centrifugation
Mode handles sample, and the bubble basic handling in sample is clean, therefore shows higher measurement accuracy.
Density pipe 10 of the present invention is provided with tube body 100, pipe close 200 and cock cap 300, is used to contain in tube body 100
120 internal diameter of open end of Material to be centrifuged, tube body 100 is gradually increased from the inside to the outside, and Material fills addition extremely in which can be convenient
In tube body 100.Density pipe 10 of the present invention, the internal diameter of open end 120 are gradually increased from the inside to the outside, rather than existing density
The mode increased again that becomes smaller that first closes up of pipe, the purpose that the internal diameter of open end 120 is gradually increased from the inside to the outside is to be conducive to tube body
Expect that intracorporal bubble is thoroughly spilled over to liquid level or more in centrifugation in 100, without still there is residual in Material.The present invention relates to
And density pipe 10, overflow channel 230 is provided on pipe close 200, Material handled in tube body 100 by high speed centrifugation, is expected
Bubble in body can quickly thoroughly be spilled over to ullage out of Material, and the bubble of ullage can be by pipe close 200
Overflow channel 230 enter in the accommodating cavity between cock cap 300 and pipe close 200, density pipe 10 of the present invention can be in short-term
It is interior to expect that intracorporal bubble is thoroughly removed completely, and be expelled to outside pipe.
Material density measuring method of the present invention is provided with density pipe 10, effectively eliminates material by density pipe 10
Bubble in body, while the Material after centrifugal treating is not required to transfer due to is directly used for density measure by density pipe 10, avoids
It is secondary to bring air into.Through repeatedly on probation, the results showed that this method to the measurement relative deviation of toughness product relative density compared with
It is small, measurement accuracy is high, and make because eliminating conventional foam time (> 12h) greatly to reduce (single sample the time required to entirely detecting
Product can be controlled in detection in 1h)；Simultaneously because density pipe 10 is small in size, the disposable sample in the case where license of 10 quantity of density pipe
Quantity is up to 36 or more.Material density measuring method of the present invention is guaranteeing measurement accuracy while examining working efficiency
Also it is greatly improved.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (6)
1. a kind of Material density measuring method, which comprises the steps of:
(1) two density pipes, the density pipe, including tube body, pipe close and cock cap are taken；The tube body is in the form of a column, the tube body
One end closure forms closed end, and the other end is open to form open end, and the internal diameter of the open end is gradually increased from the inside to the outside, described
The inner wall of open end is in frosted shape；The outer wall of the pipe close is in frosted shape, and the size of the pipe close outer wall is by one end to opposite
One end is gradually reduced to be matched with the open end for sealing, and the pipe close has for the bubble for Material in the tube body
And/or the overflow channel that Material is overflowed, the overflow channel run through the both ends of the pipe close, when the pipe close is matched with described open
When mouthful end, the overflow channel it is open at one end toward in the tube body, another end opening is toward outside the tube body；It is described
Cock cap is for covering the opening of overflow channel outwardly, and cock cap and pipe close are surrounded for accommodating the accommodating cavity for overflowing Material；
The tube body and pipe close are cleaned, dried；It weighs to density pipe described in every, the weight of the density pipe is denoted as
M0；
(2) full titer is filled in the tube body of the wherein one density pipe, covers the pipe close, by institute after note titer
It states density pipe to be placed in isoperibol, the temperature of isoperibol is higher than the original temperature of the titer in density pipe, wipes away from institute
The titer overflowed in the overflow channel of pipe close is stated, the density pipe is taken out, weighs after wiping the liquid of dry outer wall, infuses standard
The weight of the density pipe after liquid is denoted as M1；
(3) Material of density to be measured is filled in the tube body of another Zhi Suoshu density pipe, is centrifuged, and removal Material surface contains
The more Material layer of bubble, Material after centrifugation, when the liquid level of Material lower than the pipe close it is lower along when, then supplement Material to fill
The full tube body, centrifugal treating again under identical centrifugal condition, covers the pipe close, the density pipe for injecting Material is placed in
In the isoperibol, the Material overflowed out of the pipe close overflow channel is wiped away, take out the density pipe, wipe dry outer wall
It weighs after liquid, the weight of the density pipe after injecting Material is denoted as M2；
(4) relative density of the Material in preset temperature is calculated:
D=(M2-M0)/(M1-M0)*ρ0, wherein ρ0For the density of the titer.
2. Material density measuring method according to claim 1, which is characterized in that will be described with titer in step (1)
Tube body and the pipe close are cleaned, the tube body and the pipe close after cleaning, naturally dry.
3. Material density measuring method according to claim 1 or 2, which is characterized in that will with titer in step (1)
The tube body and the pipe close are cleaned, and are sprayed with the alcohol that volume fraction is 95%, then quickly blown with 50 DEG C -60 DEG C of hot wind
It is dry.
4. Material density measuring method according to claim 1 or 2, which is characterized in that the isoperibol uses water-bath,
When water-bath, the liquid level of water-bath is lower than the nozzle of the tube body, and the temperature of water-bath is higher than the original temperature of the titer in density pipe.
5. Material density measuring method according to claim 1 or 2, which is characterized in that condition when centrifugation are as follows: 3000r/
Min-4000r/min is centrifuged 5min-10min.
6. Material density measuring method according to claim 1 or 2, which is characterized in that filled in two tube bodies
After titer and the Material, the pipe close and the cock cap are covered, and two density pipes are placed in the isoperibol
In.
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| RU205571U1 (en) * | 2021-03-12 | 2021-07-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования Санкт-Петербургский государственный университет ветеринарной медицины ФГБОУ ВО СПбГУВМ | Pycnometer |
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| CN204816585U (en) * | 2015-06-16 | 2015-12-02 | 佛山迪安医学检验所有限公司 | Novel centrifuging tube |
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| CN102928318A (en) * | 2012-11-21 | 2013-02-13 | 合肥星宇化学有限责任公司 | Analytical method for fast and accurately measuring density of suspending agent |
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| CN204816585U (en) * | 2015-06-16 | 2015-12-02 | 佛山迪安医学检验所有限公司 | Novel centrifuging tube |
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| Title |
|---|
| 由自制密度管测定相对密度谈创新性实验教学;刘彦;《科教文汇》;20090930;第49、65页 * |
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Denomination of invention: Method for measuring density of material body Effective date of registration: 20200526 Granted publication date: 20190920 Pledgee: Guangzhou Baiyun Branch of China Construction Bank Co.,Ltd. Pledgor: GUANGZHOU BESE CLEAN COSMETICS MANUFACTURER Co.,Ltd. Registration number: Y2020980002515 |
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