CN107782638A - The method for detecting total dissolved solid content in water - Google Patents
The method for detecting total dissolved solid content in water Download PDFInfo
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- CN107782638A CN107782638A CN201711014296.2A CN201711014296A CN107782638A CN 107782638 A CN107782638 A CN 107782638A CN 201711014296 A CN201711014296 A CN 201711014296A CN 107782638 A CN107782638 A CN 107782638A
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- evaporating dish
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
The invention discloses the method for total dissolved solid content in detection water.This method includes：Evaporating dish is being placed in drying in oven to constant weight；Added after water sample to be measured is filtered into the evaporating dish Jing Guo constant weight；Evaporating dish is placed in water-bath after being evaporated and is dried to constant weight, to obtain being evaporated rear sample, wherein, evaporating dish bottom contact water-bath liquid level；The total dissolved solid content in water sample to be measured is determined based on the quality for being evaporated rear sample.This method can significantly shorten detection time, improve operating efficiency, and testing result is accurately credible.
Description
Technical field
The present invention relates to food detection method field, and specifically, the present invention relates to total dissolved solid in detection water to contain
The method of amount.
Background technology
Water sample after filtering, is dried at a certain temperature, and described solid residue is referred to as total dissolved solid, including is not easy
The solubility salt of volatilization, organic matter and particulate matter of filter etc. can be passed through.
Total dissolved solid has a strong impact on the quality of water in water.However, total dissolved solid content in existing detection water
Method still have much room for improvement.
The content of the invention
The present invention is proposed based on discovery of the inventor to following facts and problem：
Inventor to detection water in total dissolved solid content method research in find, current detection method master
Will be using GB/T5750.4-2006, water sample to be measured is evaporated by this side using vapor, and its drawback is detection time mistake
It is long, detect a collection of sample and about take 3 days, operating efficiency is low and testing cost is high.
In consideration of it, the method that the present invention proposes total dissolved solid content in detection water.This method can significantly shorten
Detection time, operating efficiency is improved, and testing result is accurately credible.
In the method for the present invention, the present invention proposes a kind of method for detecting total dissolved solid content in water.Root
According to embodiments of the invention, this method includes：Evaporating dish is being placed in drying in oven to constant weight；Add after water sample to be measured is filtered
Enter into the evaporating dish Jing Guo constant weight；The evaporating dish is placed in water-bath after being evaporated and is dried to constant weight, to be steamed
Sample after dry, wherein, the evaporating dish bottom contacts water-bath liquid level；The water to be measured is determined based on the quality for being evaporated rear sample
Total dissolved solid content in sample.
Thus, when the method for total dissolved solid content can significantly shorten detection in detection water according to embodiments of the present invention
Between, operating efficiency is improved, and testing result is accurately credible.
In addition, the method for total dissolved solid content can also have such as in detection water according to the above embodiment of the present invention
Additional technical characteristic down：
In some embodiments of the invention, the temperature in the baking oven is 102~108 DEG C or 177~183 DEG C.
In some embodiments of the invention, water is meet GB/T6682-2008 standards one used by the water-bath
Level water, two level water or tertiary effluent.
In some embodiments of the invention, after the evaporating dish being placed in into drying in oven 30min, it is placed in drier
Cool down 30min.
In some embodiments of the invention, the evaporating dish is placed in water-bath after being evaporated and is placed in drying in oven 1h,
It is placed in cooling 30min in drier.
In some embodiments of the invention, the addition of the water sample to be measured is 100mL.
In some embodiments of the invention, the method for total dissolved solid content further comprises in the detection water：
Sodium carbonate liquor is added into the water sample to be measured.
In some embodiments of the invention, the total dissolved solid content in the water sample to be measured is determined based on following formula：
ρ=(m3-m2) × 1000 × 1000/V,
In formula,
ρ be the water sample to be measured in total dissolved solid content, unit mg/L,
m3It is placed in for the evaporating dish in water-bath after being evaporated and is dried to the quality of constant weight, unit g,
m2For the quality of the evaporating dish constant weight, unit g,
V be the water sample to be measured volume, unit V.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the method flow schematic diagram of total dissolved solid content in detection water according to an embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail.The embodiments described below is exemplary, is only used for explaining this hair
It is bright, and be not considered as limiting the invention.Unreceipted particular technique or condition in embodiment, according to text in the art
Offer described technology or condition or carried out according to product description.Agents useful for same or the unreceipted production firm person of instrument,
For the conventional products of acquisition purchased in market can be passed through.
In the method for the present invention, the present invention proposes a kind of method for detecting total dissolved solid content in water.Root
According to embodiments of the invention, this method includes：Evaporating dish is being placed in drying in oven to constant weight；Add after water sample to be measured is filtered
Enter into the evaporating dish Jing Guo constant weight；Evaporating dish is placed in water-bath after being evaporated and is dried to constant weight, to obtain being evaporated rear sample,
Wherein, evaporating dish bottom contact water-bath liquid level；Determine that the total dissolved solid in water sample to be measured contains based on the quality for being evaporated rear sample
Amount.
The method of total dissolved solid content in detection water according to embodiments of the present invention is carried out below with reference to Fig. 1 detailed
Description.According to an embodiment of the invention, this method includes：
S100：Drying and processing
In the step, evaporating dish is being placed in drying in oven to constant weight.Weighed twice specifically, evaporating dish is dried to
It is of poor quality within 0.0004g, you can think that evaporating dish has been dried to constant weight.
According to an embodiment of the invention, the temperature in baking oven can be 102~108 DEG C or 177~183 DEG C.Inventor
It was found that it can typically use 102~108 DEG C of drying temperature；If water sample mineralization degree to be measured is higher, can use 177~
183 DEG C of drying temperature, it is possible thereby to further thoroughly remove the crystallization water in high mineralization water sample contained by salt.
According to an embodiment of the invention, after evaporating dish being placed in drying in oven 30min, then it is placed in cold in drier
But 30min, thus, it is possible to further improve the accuracy of testing result.
S200：Add water sample to be measured
In the step, added after water sample to be measured is filtered into the evaporating dish Jing Guo constant weight.According to the specific reality of the present invention
Example is applied, the addition of water sample to be measured can be 100mL, thus, it is possible to further improve the accuracy of testing result.
According to an embodiment of the invention, the method for total dissolved solid content can also be further in detection water of the invention
Including：Sodium carbonate liquor is added into sample to be tested.Specifically, when the easy moisture absorption chemical combination containing high level in water sample to be measured
Thing, such as calcium chloride, calcium nitrate, magnesium chloride or magnesium nitrate, cause subsequently to be evaporated when being difficult to constant weight after water sample to be measured, can be with
Proper amount of sodium carbonate solution is added into water sample to be measured, so that the water sample to be measured after being evaporated is easy to constant weight, improves testing result
Accuracy.In addition, if adding sodium carbonate liquor into water sample to be measured, then the sodium carbonate liquor using identical addition is needed
Blank control experiment is done, and total dissolved solid content results in the water sample to be measured subsequently measured are subtracted into blank control experiment and surveyed
Total dissolved solid content results in the sodium carbonate liquor obtained.
According to the specific embodiment of the present invention, the concentration of sodium carbonate liquor can be 10g/L, be treated based on 100mL
Water sample is surveyed, the sodium carbonate liquor of the above-mentioned concentration of 25mL can be added, thus, it is possible to further improve the degree of accuracy of testing result.
S300：It is evaporated water sample to be measured
In the step, evaporating dish is placed in water-bath after being evaporated and is dried to constant weight, to obtain being evaporated rear sample, wherein,
Evaporating dish bottom contacts water-bath liquid level.Inventor is had found, evaporating dish is placed in above water-bath relative in GB/T5750.4-2006,
The method being evaporated using vapor caused by water-bath to water sample to be measured, by the present invention in that evaporating dish bottom contacts water bath shampoo
Face, the efficiency being evaporated to water sample to be measured can be significantly improved on the premise of testing result is not influenceed, using the present invention's
Detection method, only need can complete to detect and provide result within 1 day, so as to substantially increase operating efficiency.
According to a particular embodiment of the invention, used by water-bath water be meet GB/T6682-2008 standards one-level water,
Two level water or tertiary effluent.Thus, it is possible to further improve the degree of accuracy of testing result.
According to a particular embodiment of the invention, evaporating dish can be immersed in water-bath, and make the lowermost end of evaporating dish away from
From water-bath 20~30mm of liquid level, thus, it is possible to while the testing result degree of accuracy is ensured, further improve and be evaporated water sample to be measured
Efficiency.
According to a particular embodiment of the invention, the temperature of water-bath can be 95~100 DEG C, thus, it is possible to further improve
It is evaporated the efficiency of water sample to be measured.
According to a particular embodiment of the invention, after evaporating dish is placed in water-bath is evaporated, evaporating dish can be placed in baking
Drying 1h in case, cooling 30min in drier is placed in after the completion of drying, wherein, the temperature in baking oven can be 102~108 DEG C
Or 177~183 DEG C.Thus, it is possible to further improve the degree of accuracy of testing result.
S400：Determine testing result
In the step, the total dissolved solid content in water sample to be measured is determined based on the quality for being evaporated rear sample.
According to an embodiment of the invention, the total dissolved solid content in water sample to be measured can be determined based on following formula：
ρ=(m3-m2) × 1000 × 1000/V,
In formula,
ρ be the water sample to be measured in total dissolved solid content, unit mg/L,
m3It is placed in for the evaporating dish in water-bath after being evaporated and is dried to the quality of constant weight, unit g,
m2For the quality of the evaporating dish constant weight, unit g,
V be the water sample to be measured volume, unit V.
Thus, when the method for total dissolved solid content can significantly shorten detection in detection water according to embodiments of the present invention
Between, operating efficiency is improved, and testing result is accurately credible.Meanwhile be computed, being detected every time using the detection method of the present invention can
At least to save 33.5 yuan of testing cost.
Below with reference to specific embodiment, present invention is described, it is necessary to which explanation, these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment 1
Using the one-level water and tertiary effluent for meeting GB/T6682-2008 standards as water-bath, this is verified in following manner
The degree of accuracy of inventive method, as a result as shown in table 1~3：
(1) evaporating dish is being placed in drying in oven to constant weight；
(2) added after water sample to be measured is filtered into the evaporating dish Jing Guo constant weight；
(3) evaporating dish is placed in water-bath after being evaporated and is dried to constant weight, to obtain being evaporated rear sample, wherein, steam
Send out ware bottom contact water-bath liquid level；
Table 1 uses GB/T6682-2008 tertiary effluents as water-bath and water sample to be measured is not added into evaporating dish
Table 2 adds above-mentioned one-level water as water-bath and into evaporating dish as to be measured using GB/T6682-2008 one-levels water
Water sample
Table 3 adds above-mentioned tertiary effluent as water-bath and into evaporating dish as to be measured using GB/T6682-2008 tertiary effluents
Water sample
It can be proved with reference to the experimental result of table 1~3, by using GB/T6682-2008 tertiary effluents and one-level water conduct
Water water for shower, and evaporating dish bottom contact water bath shampoo is evaporated in face of water sample to be measured, deviation exists before and after evaporating dish constant weight quality
Between ± 0.0003g, meet national standard GB/T5750.4-2006 standard, it is believed that the present invention makes evaporating dish bottom contact water-bath
Liquid level does not influence on the method that water sample to be measured is evaporated on testing result.
Embodiment 2
The method and following method that GB/T5750.4-2006 is respectively adopted detect total dissolved solid in certain Drinking Water
Content：
(1) evaporating dish is being placed in drying in oven to constant weight；
(2) added after Drinking Water to be measured is filtered into the evaporating dish Jing Guo constant weight；
(3) evaporating dish is placed in water-bath after being evaporated and is dried to constant weight, to obtain being evaporated rear sample, wherein, steam
Ware bottom contact water-bath liquid level is sent out, water water for shower is GB/T6682-2008 tertiary effluents；
(4) the total dissolved solid content in the Drinking Water to be measured is determined based on following formula：
ρ=(m3-m2) × 1000 × 1000/V,
In formula,
ρ be the water sample to be measured in total dissolved solid content, unit mg/L,
m3It is placed in for the evaporating dish in water-bath after being evaporated and is dried to the quality of constant weight, unit g,
m2For the quality of the evaporating dish constant weight, unit g,
V be the water sample to be measured volume, unit V.
Wherein,
The m measured using GB/T5750.4-20062、m3Data are as shown in table 4：
The GB/T T5750.4-2006 method testing results of table 4
The m measured using the above method of the present invention2、m3Data are as shown in table 5：
The inventive method testing result of table 5
The contrast of the testing result of GB/T5750.4-2006 methods and the inventive method is as shown in table 6：
The testing result of the GB/T5750.4-2006 methods of table 6 and the inventive method contrasts
The present invention and the results contrast of National Standard Method, through experiment, determine the total dissolved solid of 12 parts of water samples, as a result with national standard
Method makees paired t-test, and t=1.34, P ＞ 0.05, there was no significant difference, total dissolved solid content in detection water of the invention
Method testing result is accurate.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (9)
- A kind of 1. method for detecting total dissolved solid content in water, it is characterised in that includingEvaporating dish is being placed in 102~108 DEG C or 177~183 DEG C of drying in oven to constant weight；It will be added after 100mL water sample filterings to be measured into the evaporating dish Jing Guo constant weight；The evaporating dish is placed in water-bath after being evaporated and is dried to constant weight, to obtain being evaporated rear sample, wherein, the evaporating dish Bottom contacts water-bath liquid level, and water is the one-level water, two level water or three-level for meeting GB/T6682-2008 standards used by the water-bath Water；Total dissolved solid content in the water sample to be measured is determined based on following formula：ρ=(m1-m0) × 1000 × 1000/V,In formula,ρ be the water sample to be measured in total dissolved solid content, unit mg/L,m1It is placed in for the evaporating dish in water-bath after being evaporated and is dried to the quality of constant weight, unit g,m0For the quality of the evaporating dish constant weight, unit g,V be the water sample to be measured volume, unit V.
- A kind of 2. method for detecting total dissolved solid content in water, it is characterised in that including：Evaporating dish is being placed in drying in oven to constant weight；Added after water sample to be measured is filtered into the evaporating dish Jing Guo constant weight；The evaporating dish is placed in water-bath after being evaporated and is dried to constant weight, to obtain being evaporated rear sample, wherein, the evaporating dish Bottom contacts water-bath liquid level；Total dissolved solid content in the water sample to be measured is determined based on the quality for being evaporated rear sample.
- 3. according to the method for claim 2, it is characterised in that the temperature in the baking oven is 102~108 DEG C or 177 ~183 DEG C.
- 4. according to the method for claim 2, it is characterised in that water is to meet GB/T6682- used by the water-bath One-level water, two level water or the tertiary effluent of 2008 standards.
- 5. according to the method for claim 2, it is characterised in that after the evaporating dish is placed in into drying in oven 30min, put In cooling down 30min in drier.
- 6. according to the method for claim 2, it is characterised in that the evaporating dish is placed in water-bath after being evaporated and is placed in baking oven Interior drying 1h, it is placed in cooling 30min in drier.
- 7. according to the method for claim 2, it is characterised in that the addition of the water sample to be measured is 100mL.
- 8. according to the method for claim 2, it is characterised in that further comprise：Carbonic acid is added into the water sample to be measured Sodium solution.
- 9. according to the method for claim 2, it is characterised in that determine that the dissolubility in the water sample to be measured is total based on following formula Solids content：ρ=(m3-m2) × 1000 × 1000/V,In formula,ρ be the water sample to be measured in total dissolved solid content, unit mg/L,m3It is placed in for the evaporating dish in water-bath after being evaporated and is dried to the quality of constant weight, unit g,m2For the quality of the evaporating dish constant weight, unit g,V be the water sample to be measured volume, unit V.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927003A (en) * | 2019-11-14 | 2020-03-27 | 徐州伟天化工有限公司 | Method for detecting total sulfur in water |
| CN111912734A (en) * | 2020-08-18 | 2020-11-10 | 沈阳振兴环保有限公司 | Method for detecting preparation concentration of polyaluminium chloride and alumina in polyaluminium chloride solution |
-
2017
- 2017-10-26 CN CN201711014296.2A patent/CN107782638A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927003A (en) * | 2019-11-14 | 2020-03-27 | 徐州伟天化工有限公司 | Method for detecting total sulfur in water |
| CN111912734A (en) * | 2020-08-18 | 2020-11-10 | 沈阳振兴环保有限公司 | Method for detecting preparation concentration of polyaluminium chloride and alumina in polyaluminium chloride solution |
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