CN107228856A - A kind of boiler feedwater quality hardness test agent and its preparation - Google Patents
A kind of boiler feedwater quality hardness test agent and its preparation Download PDFInfo
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- CN107228856A CN107228856A CN201710685201.3A CN201710685201A CN107228856A CN 107228856 A CN107228856 A CN 107228856A CN 201710685201 A CN201710685201 A CN 201710685201A CN 107228856 A CN107228856 A CN 107228856A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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Abstract
The invention provides a kind of boiler feedwater quality hardness test agent, the reagent is made up of the following raw material counted by weight：0~1 part of eriochrome black T, 40~50 parts of borax, 50~60 parts of natrium carbonicum calcinatum, are made by crushing and being well mixed above component.The formula planning standard colorimetric card is a.It is of the invention compared with traditional disodium ethylene diamine tetraacetate titration measuring boiler feedwater total hardness method, a step detection, not only eliminate the cumbersome assay process of boiler lab technician, and save human and material resources.The reagent simple production process of the present invention, technical conditions are easily controlled, production cost is low, pollution-free.Reagent of the present invention is easy to use, and local measurement can be sampled at any time, and measurement result precision is high.
Description
Technical field
The present invention relates generally to boiler water quality test, more particularly, to a kind of boiler feedwater total hardness detection reagent and
Its preparation method.
Background technology
The main purpose of boiler water process is anti-corrosion, antiscale, and feed-water hardness is to prevent the one of fouling in boiler water process
Individual important monitoring index, so the control to feed-water hardness is most important.Quick water hardness detection reagent, can replace biography
The disodium ethylene diamine tetraacetate titration measuring boiler feedwater total hardness of system, step detection, eliminates the cumbersome change of operating personnel
Analysis process is tested, and saves human and material resources.
In the prior art, some reagents and method for being used to determine water hardness are disclosed, for example, publishing in January, 2011
Hua Yan《The research application of sugar refinery boiler feed water Determination of Hardness standard color comparison card》, specific preparation is not referred in this article
Raw material, is only broadly referred to using alcohols solvent, buffer, developer etc., and refers to that this test agent is liquid, also simultaneously
It is 0.00mmol/L, 0.01mmol/L, 0.02mmol/L, 0.03mmol/L, 0.04mmol/L, 0.05mmol/L to disclose indexing
Colorimetric card.Method in the document, because it uses liquid testing agent, compared with solid test agent, is unfavorable for shipping storage,
And be easier to go bad, substantially reduce the shelf-life；In addition, the precision of colorimetric card is also not high enough, concentration gradient is 0.01mmol/L,
For the higher occasion of some measurement requests, it is impossible to use.
The Zhang Yanjun's that in June, 1999 publishes《The research of boiler feedwater total hardness analysis method》, disclose a kind of to passing
The improved method of system water hardness, before indicator is added, into sample, addition triethanolamine is sheltered to interfering ion,
Naphthol green B is added to replace original acid chromium blue k indicator as indicator with acid chromium blue k simultaneously, this method is not a kind of fast
The hardness measuring method of speed.It is and traditional before test hardness, in addition it is also necessary to it is possible to additionally incorporate screening agent it was found from the disclosure in document
Method is compared to testing procedure is added, while using two kinds of indicator, adding the species of raw material.This method is just for specific
The research that the water quality of the specific process units of region is carried out, due to the unstable result of its hardness test, suspection exists some dry
Ion is disturbed, so that the linguistic term carried out, without representativeness.In short, the reagent type that test is used is added, analysis is surveyed
The step of examination, also increases, and significantly reduces the efficiency of hardness test.
Chinese invention patent application 200410088549.7, discloses a kind of water quality test agent for total hardness, it is characterised in that：
It is by disodium ethylene diamine tetraacetate (EDTA), the black T of inscription, ethylenediamine tetra-acetic acid magnesium disodium, natrium carbonicum calcinatum, sodium acid carbonate, chlorination
Sodium is constituted, and the parts by weight of each component are：0.03~5 part of disodium ethylene diamine tetraacetate, black 0.5~1.0 part of the T of inscription, ethylenediamine tetraacetic
3~8 parts of magnesium acetate disodium, 80~100 parts of natrium carbonicum calcinatum, 60~100 parts of sodium acid carbonate, 30~100 parts of sodium chloride；Will be above-mentioned
Component is crushed and is well mixed and produces.The method of the invention has six kinds of reagents of needs altogether, is needed after the completion of preparation filling in capsule
In use.In addition, without standard colorimetric plate is provided in the specification of the invention, the preparation for simply referring to standard colorimetric plate is normal
Rule technology, it is impossible to confirm the measuring accuracy of the method for testing.
Accordingly, it would be desirable to carry out necessary improving that there is provided a kind of required component is less, system to method of testing of the prior art
Make it is simpler, using a kind of higher water quality and hardness measuring agent of more convenient, measuring accuracy.
The content of the invention
The purpose of invention is to provide a kind of water hardness detection reagent and preparation method thereof, can by the colour developing of water sample with
Standard color comparison card is compared, the quick hardness for determining water sample.
The present invention provides a kind of boiler feedwater quality hardness test agent, it is characterised in that its by it is following by weight
Raw material is constituted：0~1 part of eriochrome black T, 40~50 parts of borax, 50~60 parts of natrium carbonicum calcinatum.
A kind of boiler feedwater quality hardness test agent that the present invention is provided, is further characterized in that, is configured with standard color comparison card
Colorimetric.
A kind of boiler feedwater quality hardness test agent that the present invention is provided, its feature is further in the water hardness
The test agent pH value scope of application is 1~9, and suitably increases or decreases consumption according to the acidity of water body.
Another aspect of the present invention there is provided a kind of method for preparing boiler feedwater quality hardness test agent, including：Weigh
40~50 parts of dry borax, and crush uniform；50~60 parts of dry sodium carbonate is weighed, and crushes uniform；Weigh eriochrome black T 0
~1 part, and crush uniform；Raw material after above-mentioned crushing is well mixed.
The detailed description of invention
The water hardness detection reagent of the present invention is made up of following raw material by weight：0~1 part of eriochrome black T, 40~
50 parts of borax, 50~60 parts of natrium carbonicum calcinatum.The water hardness detection reagent of the present invention is prepared as follows：(1) will
Raw material borax and natrium carbonicum calcinatum dry for standby；(2) raw material borax and natrium carbonicum calcinatum, eriochrome black T are ground respectively；
(3) Materials Absolute sodium carbonate, borax, eriochrome black T are well mixed by weight；Obtain product.
In water hardness detection reagent of the present invention, sodium carbonate and borax mainly play cushioning effect in the assay, test
Cheng Zhong, regulation solution ph makes it not influenceed by room temperature change to suitable measurement range, maintains the pH value of solution constant.With
The present invention is compared, like product mainly using ammonia-ammonium chloride buffer, natrium carbonicum calcinatum-sodium acid carbonate-borate buffer solution,
Sodium hydroxide-boric acid-potassium chloride buffer solution, sodium hydroxide-glycine-sodium chloride buffer system etc..The reagent of the present invention
For solid, for liquid reagent, use and store more convenient, and consumption is few.In test effect, of the invention is slow
Effect is rushed better than similar buffer.
In water hardness detection reagent of the present invention, eriochrome black T in the assay mainly as the calcium and magnesium in developer, with water sample from
Sub- chromogenic reaction, using the contrast of standard color comparison card, judges the hardness of water sample.Like product also has acidic chromium as developer
Blue K, acid chromium blue k-naphthol green B, calmagite etc., this class developer are in use in addition to it need to add certain screening agent,
Also need to add other a certain amount of developers as assistant toner, such as methyl yellow, methyl red, methyl orange, develop the color just more sensitive.
On the contrary, the colour developing precision of detection reagent of the present invention is high, therefore, it need to only be contrasted from colour developing with standard color comparison card, you can confirm water quality
Total hardness, water sample hardness is determined without the quasi- EDTA solution of another mark-on.
When determining, the water hardness detection reagent of the present invention is proportionally added into water sample to be measured, passes through water sample
Color is compared with standard color comparison card, you can learn the hardness of water sample.
It is hard by water hardness detection reagent and corresponding standard color comparison card quick detection water sample the invention provides one kind
The method of degree, the method for testing provided using the present invention, obvious technical effects.The present invention may replace disodium ethylene diamine tetraacetate drop
Determine the method that method determines boiler feedwater total hardness, step detection eliminates the cumbersome assay process of operating personnel, both saved
Manpower, saves material resources again.Simple production process, environmental protection, the technical conditions of test agent of the present invention are easily controlled, and are produced into
This is low, easy to use, can sample at any time, local measurement.
Compared with prior art, test agent of the invention is with low cost.The water quality and hardness measuring agent of the present invention, is used
Raw material components it is few, only three kinds components, less than like product.Moreover, the method prepared is simple, only need to be by qualified original
Expect that uniform mixing can dispense preservation in proportion to use.
Test agent reaction of the present invention is fast, color stability.The water quality and hardness measuring agent of the present invention, using simple, need to only be pressed
Certain proportion, per 100ml water samples, only need to add 0.1~0.2g, added in water sample, and about 1min times, i.e. colour developing finish,
And can stablize more than 5 minutes.Reaction time is better than like product, while the color stability time is also superior to like product.
The colour developing precision of the test agent of the present invention is high.The water quality and hardness measuring agent of the present invention, colour developing precision is high, can be in water
With the distribution of 10 concentration gradients between matter total hardness 0.000mmol/L~0.050mmol/L, reflect that water quality is always hard exactly
Degree, colour developing is good, as a result accurately, and colour developing precision is better than like product.
When water sample hardness is in below 0.030mmol/L, water sample develops the color based on blue keynote in standard color comparison card, from
0.000mmol/L to 0.025mmol/L, color is gradually deepened to bluish violet from sky blue；When water sample hardness is 0.030mmol/L
When, water sample colour developing starts to show micro mist color, and deepens as concentration is raised；When water sample concentration reaches 0.050mmol/L,
Water sample color has been in reddish violet.Numerical value is total hardness in colorimetric card, and unit is mmol/L, elementary cell c (1/2Ca2+、1/2Mg2 +) with reference to GB/T 1576《Industrial Boiler water quality》.
The water quality and hardness measuring agent that the present invention is provided is equipped with the colorimetric card of 10 deciles, the measuring result display present invention
Sensitivity, the degree of accuracy of reagent are higher.
The sensitive colour developing of water quality and hardness measuring agent of the present invention, the test agent component and their proportioning of selection are taken with it
It is closely related, exactly because the present invention have chosen specific component and proportioning so that shows determining water sample in concentration range
Color is sensitive, clear and legible, and can set the colorimetric card with 10 concentration gradients.On the contrary, when component difference, or match not
When suitable, color developing effect can be deteriorated, and color developing effect is too deep or excessively shallow, be difficult to differentiate and distinguish, increase evaluated error.
Embodiment 1
Take borax, sodium carbonate, eriochrome black T by weight proportion：40 parts of borax, 59.9 parts of sodium carbonate, 0.1 part of eriochrome black T, grinding
It is well mixed after crushing, water hardness detection reagent is made.100ml water samples are taken, 0.1g water hardness detection reagents, concussion is added
After shaking up, color is carried out by water sample color and colorimetric card and compared, water hardness can be read from colorimetric card.According to GB/T
The hardness of 1576 water samples determined is 0.027mmol/L, and the hardness read from colorimetric card is 0.030mmol/L.
Embodiment 2
Take borax, sodium carbonate, eriochrome black T by weight proportion：50 parts of borax, 49 parts of sodium carbonate, 1 part of eriochrome black T, grind
After be well mixed, water hardness detection reagent is made.100ml water samples are taken, 0.1g water hardness detection reagents are added, concussion shakes up
Afterwards, carry out color by water sample color and colorimetric card to compare, water hardness can be read from colorimetric card.According to GB/T 1576
The hardness of the water sample of measure is 0.033mmol/L, and the hardness read from colorimetric card is 0.030mmol/L.
Embodiment 3
Take borax, sodium carbonate, eriochrome black T by weight proportion：44 parts of borax；55.5 parts of sodium carbonate；0.5 part of eriochrome black T, grinding
It is well mixed after crushing, water hardness detection reagent is made.100ml water samples are taken, 0.1g water hardness detection reagents, concussion is added
After shaking up, color is carried out by water sample color and colorimetric card and compared, water hardness can be read from colorimetric card.According to GB/T
The hardness of 1576 water samples determined is 0.030mmol/L, and the hardness read from colorimetric card is 0.030mmol/L.
Comparative example 1
The Zhang Yanjun's published according in June, 1999《The research of boiler feedwater total hardness analysis method》Disclosed in one kind
To the improved method of traditional water hardness, the test of water hardness is carried out, the reaction time is more than 3 minutes, and the water of the present invention
Matter hardness measuring method, the reaction time is about 1min, highly shortened detection time.
Comparative example 2
According to disclosed in Chinese invention patent application CN201510713571.4《A kind of determining total hardness of water quick detection examination
Agent and detection method》, carry out water quality and hardness measuring, the detection reagent product, color can stablize 3min after colour developing completely, and this hair
After bright water quality and hardness measuring agent colour developing completely, more than 5min can be stablized, comparatively speaking, when reagent colour development of the invention is stable
Between more preferably.
Comparative example 3
The Hua Yan's that in January, 2011 publishes《The research application of sugar refinery boiler feed water Determination of Hardness standard color comparison card》, it is open
A kind of water quality and hardness measuring agent, and concentration indexing are 0.00mmol/L, 0.01mmol/L, 0.02mmol/L, 0.03mmol/
6 of L, 0.04mmol/L, 0.05mmol/L etc. point colorimetric card, colorimetric card has been made according to its disclosed method.The present invention is provided
Indexing is 0.000mmol/L, 0.010mmol/L, 0.015mmol/L, 0.020mmol/L, 0.025mmol/L,
10 of 0.030mmol/L, 0.035mmol/L, 0.040mmol/L, 0.045mmol/L, 0.050mmol/L etc. point colorimetric card is dense
Degree gradient is 0.005mmol/L.After testing same water sample, it is according to the hardness of the water samples determined of GB/T 1576
0.024mmol/L, from《The research application of sugar refinery boiler feed water Determination of Hardness standard color comparison card》In colorimetric read as
0.02mmol/L, and the hardness read from the colorimetric card of the present invention is 0.025mmol/L.It can be seen that colorimetric card concentration ladder of the invention
Degree is smaller, and precision is higher, and each concentration color gradient is clear and legible, reduces detection error.
Claims (4)
1. a kind of boiler feedwater quality hardness test agent, it is characterised in that be made up of following raw material by weight：0~1 part
Eriochrome black T, 40~50 parts of borax, 50~60 parts of natrium carbonicum calcinatum.
2. a kind of boiler feedwater quality hardness test agent according to claim 1, it is characterised in that be configured with standard colorimetric
Card colorimetric.
3. a kind of boiler feedwater quality hardness test agent according to claim 1 or 2, it is characterised in that the water quality is hard
It is 1~9 to spend the test agent pH value scope of application, and suitably increases or decreases consumption according to the acidity of water body.
4. a kind of method of boiler feedwater quality hardness test agent as claimed in claim 1 or 2 is prepared a kind of, including：Weigh
40~50 parts of dry borax, and crush uniform；50~60 parts of dry sodium carbonate is weighed, and crushes uniform；Weigh eriochrome black T 0
~1 part, and crush uniform；Raw material after above-mentioned crushing is well mixed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108333296A (en) * | 2018-01-26 | 2018-07-27 | 山东五洲检测有限公司 | A kind of determining total hardness of water detection agent and preparation method thereof |
| CN112577914A (en) * | 2020-11-18 | 2021-03-30 | 上海仪电科学仪器股份有限公司 | Water hardness determination method |
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| CN108333296A (en) * | 2018-01-26 | 2018-07-27 | 山东五洲检测有限公司 | A kind of determining total hardness of water detection agent and preparation method thereof |
| CN112577914A (en) * | 2020-11-18 | 2021-03-30 | 上海仪电科学仪器股份有限公司 | Water hardness determination method |
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Application publication date: 20171003 |