CN109269935A - A kind of insulation cover and the method using filter paper ashing time in its shortening gravimetry - Google Patents
A kind of insulation cover and the method using filter paper ashing time in its shortening gravimetry Download PDFInfo
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- CN109269935A CN109269935A CN201811039525.0A CN201811039525A CN109269935A CN 109269935 A CN109269935 A CN 109269935A CN 201811039525 A CN201811039525 A CN 201811039525A CN 109269935 A CN109269935 A CN 109269935A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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Abstract
Shorten the method for filter paper ashing time in gravimetry the present invention provides a kind of insulation cover and using it, the insulation cover includes cover, cover is hollow structure, one end is provided with the first hole, the other end is provided with the second hole, the area in the first hole is additionally provided with handle on cover less than the area in the second hole.The heating efficiency that can greatly improve filter paper podzolic process in gravimetry is used using the insulation cover cooperation heating device provided by the invention, shorten the ashing time of filter paper, effectively prevent filter paper burning, effective element is caused to lose, the gas for influencing the accuracy of measurement result, while also preventing heating process generation, which quickly overflows, causes explosion that sample is caused to splash.
Description
Technical field
The invention belongs to chemical analysis field, it is related to a kind of insulation cover and its application method more particularly to a kind of insulation cover
And shorten the method for filter paper ashing time in gravimetry using it.
Background technique
Gravimetry be in chemical analysis through frequently with analysis method, this method comprises the following steps: firstly,
Accurately weigh a certain amount of sample；Then, wherein ingredient to be surveyed is become pure compound or list using chemical reaction appropriate
Body is precipitated, and is separated using the methods of filtering with other compositions；Finally, being weighed after drying or calcination, until constant weight, finds out and be intended to survey
Ingredient proportion in the sample.Gravimetry is frequently used for the elements such as silicon, barium in measurement of species, commonly used to have height
Chloric acid determination measures silicon, barium sulfategravimetry measurement barium etc..
Wherein one of analytical procedure of the analysis method is to heat the sediment of filtering and filter paper together, by filter paper ash
Change, fast heating at high temperature ashing may cause sediment and be pulled away in order to prevent, and general there are two types of heating methods, and one is Muffles
Stove heating is put into the crucible for filling precipitating and filter paper in Muffle furnace at room temperature, opens fire door control stove and is heated slowly to
200~250 degree, it is ashed filter paper.Another kind is the progress low-temperature heat ashing on electric furnace, complete by being slowly heated paper ashization to be filtered
Calcination is carried out again after complete, if directly high temperature sintering filter paper is by ignition, precipitating will be taken out of by thermal current, keep measured value inclined
It is low.Using needs when Muffle furnace, in fire door, there are gaps, otherwise may filter to guarantee to have in furnace enough air by filter paper burning-off
Paper ashization is incomplete, deviates measured value big, so using the bad control of temperature during Muffle furnace, and need constantly adjustment furnace
Interior temperature influences the service life of stove, is also unfavorable for observation ashing effect in furnace, identical as electric furnace heating on the time.Cause
This most laboratory selection directly heats on high-temperature electric resistance furnace, burns in air, and ashing is ashed in this way to complete convenient for observation
Situation can reach ashing effect without control temperature is specially gone.However filter paper ashing short time consumption is relatively long, from connecing
To sample to data result is gone out, generally requiring more than ten hour, the process that heating is ashed filter paper must need 4 hours or so,
It seriously affects and does the time that sample goes out result.
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Currently, during using gravimetry measurement constituent content, too long the time required to being ashed there is filter paper,
The problems such as ashing efficiency is low and ashing situation inconvenience is observed, and at this stage, for this problem, there is not researcher to propose effective
Solution.Therefore, it is badly in need of a kind of attemperator cooperation electric furnace use, it is very big to shorten ash while ensuring to be ashed effect
Change the time, improves ashing efficiency.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of insulation cover and shorten weight using its
The method of filter paper ashing time in analytic approach can greatly improve heating efficiency using insulation cover cooperation heating device use, contract
The short ashing time of filter paper.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of insulation cover, including cover, during the upper and lower ends of the cover are set as
Sky, one end are provided with the first hole, and the other end is provided with the second hole, the area in the first hole less than the second hole area, on cover also
Equipped with handle.
In the prior art, what researcher in this field will be appreciated that is the general step of gravimetry, firstly, accurately
Ground weighs a certain amount of sample；Then, wherein ingredient to be surveyed is become pure compound or simple substance using chemical reaction appropriate
It is precipitated, is separated and dried using the methods of filtering with other compositions；Finally, by claiming after the filter paper for filling sediment ashing, calcination
Amount, until constant weight, calculates ingredient to be surveyed proportion in the sample.This method accuracy is higher but takes a long time, filter paper ash
Change and need 4 hours or so completely, has seriously affected test sample efficiency；Meanwhile in the actual operation process, since heating process is heated
Unevenly, local temperature increases, and causes filter paper burning to take away sediment, finite element is caused to lose；In addition, passing through perchloric acid
It is possible that not clean because rinsing when filtering when determination measures silicon, perchloric acid adds thermogenetic chlorine quickly to overflow to cause
Explosion makes sample splash.
The present invention highly shortened the ashing time of filter paper, improve and add by adding insulation cover on the heating
The thermal efficiency, compared with unused insulation cover, filter paper ashing time was foreshortened to by 4 hours less than 2 hours, meanwhile, also effectively avoid
Because filter paper burning caused by operation error and sample splash.
The both ends of insulation cover of the present invention are respectively equipped with the first hole and the second hole, wherein the first hole is podzolic process
Peep hole opens up the first hole, convenient for experimenter observe filter paper ashing situation, be conducive to researcher in podzolic process with
When adjust heating temperature, avoid filter paper from burning because local temperature is excessively high, effective element caused to lose；Wherein, the face in the first hole
Product can enhance the Heat-collecting effect of insulation cover less than the area in the second hole.
It is additionally provided with handle on cover of the present invention, experimenter is facilitated to remove insulation cover after ashing.
As currently preferred technical solution, the internal diameter in first hole is 150~250mm, such as be can be
150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm or 250mm, preferably 150
~200mm, the outer diameter in first hole are 160~270mm, for example, can be 160mm, 170mm, 180mm, 190mm, 200mm,
210mm, 220mm, 230mm, 240mm, 250mm, 260mm or 270mm, preferably 180~230mm, it is not limited to listed
The numerical value of act, other interior numerical value of listed range are feasible.
Preferably, the internal diameter in second hole be 200~300mm, such as can be 200mm, 210mm, 220mm,
230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm or 300mm, preferably 220~280mm；Second hole
Outer diameter be 210~320mm, such as can be 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm,
290mm, 300mm, 310mm or 320mm, preferably 220~300mm, it is not limited to cited numerical value, in listed range
Other numerical value are feasible.
As currently preferred technical solution, the internal diameter ratio in first hole and the second hole is 0.65~0.75, example
It such as can be 0.65,0.66,0.67,0.68,0.69,0.7,0.71,0.72,0.73,0.74 or 0.75, preferably 0.7.
Preferably, the outer diameter in the first hole and the second hole ratio is 0.65~0.75, for example, can be 0.65,0.66,0.67,
0.68,0.69,0.7,0.71,0.72,0.73,0.74 or 0.75, preferably 0.7, the internal diameter in the first hole and the second hole than too small,
It is unfavorable for observing the ashing situation of filter paper in insulation cover, meanwhile, the adhesion object on the inside of cover is also extremely easy to drop into crucible, influences
The accuracy of measurement result；And internal diameter is unfavorable for playing the heat-preservation heat-collection effect of insulation cover than excessive, also affects the equal of crucible
It is even heated, therefore more suitable internal diameter ratio is 0.75.
As currently preferred technical solution, the height of the cover is 100~200mm, for example, can be 100mm,
110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm or 200mm, preferably 100~150mm,
It is not limited to cited numerical value, other interior numerical value of listed range are feasible.
As currently preferred technical solution, the shape of the cover is rotary table, cylinder or sphere, preferably rotary table,
It is not only convenient for experimenter and clamps insulation cover, be also beneficial to the Heat-collecting effect of enhancing insulation cover.
As currently preferred technical solution, the cover is fired by heat resisting ceramic materials.
Preferably, the heat resisting ceramic materials include the combination of one or more of quartz, feldspar, clay, example
It such as can be combination, the combination of quartz and clay or the combination of feldspar and clay of quartz and feldspar, preferred heat proof material tool
It is not easy to hardening crack, the advantages such as rate of heat transfer is slow and heat insulation effect is good, not only acts as heat-preservation heat-collection in filter paper podzolic process
Effect also ensures that filter paper is heated evenly, and prevents filter paper from burning.
As currently preferred technical solution, the number of the handle is 1~6, such as can be 1,2,3
A, 4,5 or 6, preferably 2~4, setting handle remove insulation cover convenient for experimenter after ashing, handle
Particular number can carry out appropriate adjustment according to experiment demand in listed range.
Preferably, the handle is uniformly distributed on cover, and the spacing between handle and handle is identical, is equally spaced, and is had
Conducive to the stability of enhancing insulation cover, clamped convenient for experimenter.
As currently preferred technical solution, the handle with a thickness of 5~15mm, such as can be 5mm, 6mm,
7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm or 15mm, preferably 7~15mm, it is not limited to cited number
Value, other interior numerical value of listed range are feasible.
Second aspect shortens the method for filter paper ashing time in gravimetry, the method packet using above-mentioned insulation cover
Include following steps:
Insulation cover is placed in heating device, the appearance sampling device equipped with filter paper is put into insulation cover, wherein the filter paper
Surface is placed with sediment, opens heating device and is heated, filter paper is ashed.
Preferably, the heating device is electric furnace.
Preferably, the filter paper be 9~18cm of diameter quantitative analysis filter paper, wherein filter paper diameter can be 9cm,
10cm, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm or 18cm, it is not limited to cited numerical value, listed model
Other numerical value are feasible in enclosing.
Preferably, the appearance sampling device is crucible or evaporating dish.
The quantity for holding sampling device is according to the size appropriate adjustment of insulation cover, and preferably 2~6, such as can be 2
A, 3,4,5 or 6, the quantity for holding sampling device placement is very few, is unfavorable for insulation cover and plays collection heat effect, insulation cover
Utilization rate reduces, and the test sample time extends, heating efficiency decline；Hold sampling device placement quantity and excessively easily leads to heating unevenly, filter
Paper is heated easy firing.
Split-type design is used between insulation cover and heating device of the present invention, can be incited somebody to action when not using insulation cover
Insulation cover is packed up, and heating device is used when without will affect subsequent operation.
When carrying out ash operation, first insulation cover should be buckled on the heating, place into appearance sampling device, in filter paper ash
After change completely, first sampling device is held in clamping, moves back except insulation cover, sequentially carries out operating through the above steps can effectively avoid to place and protect
Adhesion object, which falls to hold in sampling device, during temperature cover and removal insulation cover causes measurement result deviation occur, advantageously reduces
The operation requirement of researcher and operation precision improve the accuracy of measurement result.
As currently preferred technical solution, the heating rate of the heating device is 10~15 DEG C/min, such as can
To be 10 DEG C/min, 11 DEG C/min, 12 DEG C/min, 13 DEG C/min, 14 DEG C/min or 15 DEG C/min, preferably 11 DEG C/min.
Preferably, the heating temperature of heating device be 100~580 DEG C, for example, it may be 100 DEG C, 150 DEG C, 200 DEG C,
250 DEG C, 300 DEG C, 350 DEG C, 400 DEG C, 450 DEG C, 500 DEG C or 550 DEG C, heating temperature is too low to cause ashing time to extend, heating
Efficiency decline, heating temperature is excessively high to easily lead to filter paper burning, causes effective element to lose, accordingly, it is preferred that heating temperature is 300
~550 DEG C, it is not limited to cited numerical value, other interior numerical value of listed range are feasible.
Preferably, the heating time of heating device is 0.5~3 hour, for example, it may be 0.5 hour, 1 hour, it is 1.5 small
When, 2 hours, 2.5 hours or 3 hours, it is preferable that be 0.7~2 hour, compared with not set heating mantles, heating heating time by
It foreshortens within 4 hours 0.7~2 hour, shortens 50% or more.
Numberical range of the present invention not only includes enumerated point value, further includes the above-mentioned numerical value not included
Arbitrary point value between range, as space is limited and for concise consideration, range described in the present invention no longer exclusive list includes
Specific point value.
Compared with prior art, the invention has the benefit that
1, cover one end of insulation cover offers hole, covers the filter paper in interior crucible convenient for observation and is ashed situation.
2, the cover structure of insulation cover plays collection heat effect, improves heating efficiency, highly shortened the ash of filter paper
Change the time, compared with unused insulation cover, filter paper ashing time was foreshortened to by 4 hours less than 2 hours.
3, it adds on the heating and effectively prevents filter paper after insulation cover and cause filter paper to burn because local temperature is excessively high, make
The gas for losing at effective element, influencing the accuracy of measurement result, while also avoiding heating process generation, which quickly overflows, to be made
Sample is caused to splash at explosion.
4, insulation cover uses the heat resisting ceramic materials for being not easy to hardening crack and heat insulation effect is good, fires through high temperature, reinforces
The heat-preservation heat-collection effect of insulation cover.
5, split-type design is used between insulation cover and heating device, can be packed up when not using insulation cover, and
Heating device is used when will not influence subsequent operation.
6, according to first placing insulation cover, after be put into appearance sampling device, first sampling device is held in clamping after ashing, then removes heat preservation
The sequence of cover carries out ash operation, can effectively avoid adhesion object during placing insulation cover and removing insulation cover and falls to appearance sample
Cause measurement result deviation occur in device, reduces operation requirement and the operation precision of researcher, improve measurement result
Accuracy.
Detailed description of the invention
Fig. 1 is the main view of insulation cover in embodiment 1.
Fig. 2 is the top view of insulation cover in embodiment 1.
Fig. 3 is the main view of insulation cover in embodiment 4.
Fig. 4 is the method flow diagram for shortening filter paper ashing time in gravimetry in embodiment 1 using insulation cover.
Wherein: 1- cover, 2- handle, the first hole 3-, the second hole 4-.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment 1
A kind of insulation cover is present embodiments provided, main view and top view difference are as depicted in figs. 1 and 2, wherein keeping the temperature
Cover includes cover 1, and the upper and lower ends of the cover are set as hollow, and one end is provided with the first hole 3, and the other end is provided with the second hole
4, the area in the first hole 3 is additionally provided with handle 2 on cover less than the area in the second hole 4.
The cover 1 is truncated cone-shaped, is highly 120mm, and cover wall thickness is 6mm；2 handles are symmetrically distributed on the cover
Hand 2, handle is with a thickness of 10mm；The internal diameter in first hole 3 is 188mm, and the outer diameter in the first hole 3 is 200mm, the second hole 4 it is interior
Diameter is 248mm, and the outer diameter in the second hole 4 is 260mm.
The cover 1 after quartz and feldspar mixing by firing.
Shorten the method for filter paper ashing time in gravimetry using above-mentioned insulation cover, as shown in figure 4, including following step
It is rapid:
Insulation cover is placed on electric furnace, the filter paper equipped with sediment is placed in crucible, then crucible is placed in insulation cover,
Electric furnace is opened, heating rate is 12 DEG C/min, and heating temperature is 200 DEG C, carries out ashing processing to filter paper, sees from the first hole 3
Filter paper ashing situation is examined, heating time of electric furnace is 2 hours, and filter paper ashing completely, closes electric furnace, with crucible tongs by crucible from guarantor
Take out in temperature cover, after insulation cover is cooling, insulation cover removed from electric furnace, to after ashing filter paper and sediment carry out it is subsequent
Routine operation.
Wherein, it is placed with 4 crucibles in insulation cover, while heating ashing processing is carried out to the filter paper in crucible.
Embodiment 2
A kind of insulation cover, including cover 1 are present embodiments provided, the upper and lower ends of the cover are set as hollow, one end
It is provided with the first hole 3, the other end is provided with the second hole 4, and the area in the first hole 3 is also set up on cover less than the area in the second hole 4
There is handle 2.
The cover 1 is truncated cone-shaped, is highly 100mm, and cover wall thickness is 5mm；2 handles are symmetrically distributed on the cover
Hand 2, handle is with a thickness of 5mm；The internal diameter in first hole 3 is 150mm, and the outer diameter in the first hole 3 is 160mm, the internal diameter in the second hole 4
For 200mm, the outer diameter in the second hole 4 is 210mm.
The cover 1 after quartz and clay mixing by firing.
The method for being shortened filter paper ashing time in gravimetry using above-mentioned insulation cover, is included the following steps:
Insulation cover is placed on electric furnace, the filter paper equipped with sediment is placed in crucible, then crucible is placed in insulation cover,
Electric furnace is opened, heating rate is 10 DEG C/min, and heating temperature is 100 DEG C, carries out ashing processing to filter paper, sees from the first hole 3
Examine filter paper ashing situation, heating time of electric furnace is 3.0 hours, and filter paper ashing completely, closes electric furnace, with crucible tongs by crucible from
It takes out in insulation cover, after insulation cover is cooling, insulation cover is removed from electric furnace, to the filter paper after ashing and after sediment carries out
Continuous routine operation.
Wherein, it is placed with 2 crucibles in insulation cover, while heating ashing processing is carried out to the filter paper in crucible.
Embodiment 3
A kind of insulation cover, including cover 1 are present embodiments provided, the upper and lower ends of the cover are set as hollow, one end
It is provided with the first hole 3, the other end is provided with the second hole 4, and the area in the first hole 3 is also set up on cover less than the area in the second hole 4
There is handle 2.
The cover 1 is truncated cone-shaped, is highly 200mm, and cover wall thickness is 10mm；2 are symmetrically distributed on the cover
Handle 2, handle is with a thickness of 15mm；The internal diameter in first hole 3 is 250mm, and the outer diameter in the first hole 3 is 270mm, the second hole 4
Internal diameter is 300mm, and the outer diameter in the second hole 4 is 320mm.
The cover 1 after feldspar and clay mixing by firing.
The method for being shortened filter paper ashing time in gravimetry using above-mentioned insulation cover, is included the following steps:
Insulation cover is placed on electric furnace, the filter paper equipped with sediment is placed in crucible, then crucible is placed in insulation cover,
Electric furnace is opened, heating rate is 15 DEG C/min, and heating temperature is 300 DEG C, carries out ashing processing to filter paper, sees from the first hole 3
Examine filter paper ashing situation, heating time of electric furnace is 1.5 hours, and filter paper ashing completely, closes electric furnace, with crucible tongs by crucible from
It takes out in insulation cover, after insulation cover is cooling, insulation cover is removed from electric furnace, to the filter paper after ashing and after sediment carries out
Continuous routine operation.
Wherein, it is placed with 6 crucibles in insulation cover, while heating ashing processing is carried out to the filter paper in crucible.
Embodiment 4
A kind of insulation cover is present embodiments provided, main view is as shown in figure 3, wherein insulation cover includes cover 1, the cover
The upper and lower ends of body are set as hollow, and one end is provided with the first hole 3, and the other end is provided with the second hole 4, and the area in the first hole 3 is small
Area in the second hole 4 is additionally provided with handle 2 on cover.
The cover 1 is spherical shape, is highly 120mm, and cover wall thickness is 6mm；2 handles are symmetrically distributed on the cover
2, handle is with a thickness of 10mm；The internal diameter in first hole 3 is 188mm, and the outer diameter in the first hole 3 is 200mm, the internal diameter in the second hole 4
For 248mm, the outer diameter in the second hole 4 is 260mm.
The cover 1 after quartz, feldspar and clay mixing by firing.
The method for being shortened filter paper ashing time in gravimetry using above-mentioned insulation cover, is included the following steps:
Insulation cover is placed on electric furnace, the filter paper equipped with sediment is placed in crucible, then crucible is placed in insulation cover,
Electric furnace is opened, heating rate is 12 DEG C/min, and heating temperature is 500 DEG C, carries out ashing processing to filter paper, sees from the first hole 3
Examine filter paper ashing situation, heating time of electric furnace is 0.7 hour, and filter paper ashing completely, closes electric furnace, with crucible tongs by crucible from
It takes out in insulation cover, after insulation cover is cooling, insulation cover is removed from electric furnace, to the filter paper after ashing and after sediment carries out
Continuous routine operation.
Wherein, it is placed with 4 crucibles in insulation cover, while heating ashing processing is carried out to the filter paper in crucible.
Embodiment 5
Shorten the method for filter paper ashing time in gravimetry using insulation cover as described in example 4, including walks as follows
It is rapid:
Insulation cover is placed on electric furnace, the filter paper equipped with sediment is placed in crucible, then crucible is placed in insulation cover,
Electric furnace is opened, heating rate is 11 DEG C/min, and heating temperature is 580 DEG C, carries out ashing processing to filter paper, sees from the first hole 3
Examine filter paper ashing situation, heating time of electric furnace is 0.5 hour, and filter paper ashing completely, closes electric furnace, with crucible tongs by crucible from
It takes out in insulation cover, after insulation cover is cooling, insulation cover is removed from electric furnace, to the filter paper after ashing and after sediment carries out
Continuous routine operation.
Wherein, it is placed with 1 crucible in insulation cover, while heating ashing processing is carried out to the filter paper in crucible.
Comparative example 1
A kind of method that filter paper is ashed in gravimetry, in addition to without using insulation cover, remaining and side described in embodiment 1
Method is identical.
As a result are as follows: when electric furnace uses the heating rate of 12 DEG C/min, filter paper can burn, and cause the loss of effective element.It adjusts
The heating rate of whole electric furnace is 8 DEG C/min, and filter paper heating time required when being ashed completely is 4.5 hours, with unused heat preservation
Cover is compared, and the relative error for testing measurement is+1.2%, in the error range that experiment allows.
From the foregoing, it will be observed that insulation cover provided by the invention and method greatly mention on the basis of guaranteeing measurement result accuracy
High heating efficiency, shortens heating time, compared with unused insulation cover, the heating time of filter paper can shorten 50% with
On, meanwhile, also effectively prevent filter paper causes filter paper to burn because local temperature is excessively high, and effective element is caused to lose.
The Applicant declares that the foregoing is merely a specific embodiment of the invention, but protection scope of the present invention not office
It is limited to this, it should be clear to those skilled in the art, any to belong to those skilled in the art and take off in the present invention
In the technical scope of dew, any changes or substitutions that can be easily thought of, and all of which fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. a kind of insulation cover, including cover, which is characterized in that the cover is hollow structure, and one end is provided with the first hole, another
End is provided with the second hole, and the area in the first hole is additionally provided with handle on cover less than the area in the second hole.
2. insulation cover according to claim 1, which is characterized in that the internal diameter in first hole is 150~250mm, preferably
For 150~200mm；The outer diameter in first hole is 160~270mm, preferably 180~230mm；
Preferably, the internal diameter in second hole is 200~300mm, preferably 220~280mm, and the outer diameter in second hole is
210~320mm, preferably 220~300mm.
3. insulation cover according to claim 1 or 2, which is characterized in that the internal diameter ratio in first hole and the second hole is
0.65~0.75, preferably 0.7；The outer diameter ratio in first hole and the second hole is 0.65~0.75, preferably 0.7.
4. insulation cover according to claim 1-3, which is characterized in that the height of the cover be 100~
200mm, preferably 100~150mm.
5. insulation cover according to claim 1-4, which is characterized in that the shape of the cover is rotary table, cylinder
Or sphere.
6. insulation cover according to claim 1-5, which is characterized in that the cover is fired by heat resisting ceramic materials
It forms；
Preferably, the heat resisting ceramic materials include the combination of one of quartz, feldspar or clay or at least two.
7. insulation cover according to claim 1-6, which is characterized in that the number of the handle is 1~6；
Preferably, the handle is uniformly distributed on cover.
8. insulation cover according to claim 1-7, which is characterized in that the handle with a thickness of 5~15mm, it is excellent
It is selected as 7~15mm.
9. a kind of side for shortening filter paper ashing time in gravimetry using the described in any item insulation covers of claim 1-8
Method, which is characterized in that described method includes following steps:
Insulation cover is placed in heating device, the appearance sampling device equipped with filter paper is put into insulation cover, wherein the surface
It is placed with sediment, heating device is opened and is heated, filter paper is ashed.
Preferably, the heating device is electric furnace；
Preferably, the filter paper is the quantitative analysis filter paper of 9~18cm of diameter；
Preferably, the appearance sampling device is crucible or evaporating dish.
10. according to the method described in claim 9, it is characterized in that, it is described hold sampling device in heating rate be 10~15 DEG C/
Min, preferably 11 DEG C/min；
Preferably, the temperature of the heating is 100~580 DEG C；
Preferably, the time of the heating is 0.5~3 hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811039525.0A CN109269935A (en) | 2018-09-06 | 2018-09-06 | A kind of insulation cover and the method using filter paper ashing time in its shortening gravimetry |
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| CN201811039525.0A CN109269935A (en) | 2018-09-06 | 2018-09-06 | A kind of insulation cover and the method using filter paper ashing time in its shortening gravimetry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199979A (en) * | 2020-09-16 | 2022-03-18 | 中国石油化工股份有限公司 | Digestion and evaporation device and method for measuring content of trace elements |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114199979A (en) * | 2020-09-16 | 2022-03-18 | 中国石油化工股份有限公司 | Digestion and evaporation device and method for measuring content of trace elements |
| CN114199979B (en) * | 2020-09-16 | 2024-04-30 | 中国石油化工股份有限公司 | Digestion and evaporation device and method for measuring trace element content |
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