CN101514972B - Fluorine concentration fast-check method - Google Patents
Fluorine concentration fast-check method Download PDFInfo
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- CN101514972B CN101514972B CN 200910021735 CN200910021735A CN101514972B CN 101514972 B CN101514972 B CN 101514972B CN 200910021735 CN200910021735 CN 200910021735 CN 200910021735 A CN200910021735 A CN 200910021735A CN 101514972 B CN101514972 B CN 101514972B
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Abstract
The invention discloses a fluorine concentration fast-check method, a standard equation F- is established at first, if a selective electrode is during a period of normal use and no new electrode is replaced, the standard equation can be used all the while, a plurality of sets of electric potential difference values E and corresponding fluorine concentration data are obtained via the standard equation and are manufactured into a fluorine concentration fast-check ruler. In order to guarantee the measurement precision, an F- concentration standard solution having the concentration of 10 is employed for calibration so as to obtain an mv1 value, an mv2 value of water sample is then measured, the mv1 value is aligned to the value of the fluorine concentration fast-check ruler corresponding to the fluorine concentration, as a result, a water sample fluorine concentration numerical value corresponding to the mv2 value can be obtained rapidly.
Description
Technical field:
The invention belongs to fluorine concentration determination field, relate to a kind of fluorine method for measurement of concentration.
Background technology:
When the analyst measured water sample fluorine concentration in the past, the method for employing was to set up standard equation earlier, through measuring water sample current potential difference E (mv), calculated fluorine concentration C (mg/l) according to the E value by standard equation then.This kind method is time-consuming, bothersome.
This method is that a kind of current potential difference E (mv) that decides in waste water or other the fluorine-containing water sample through the PH/mv instrumentation counts, and utilizes homemade fluorine concentration fast-check chi to check in corresponding fluorine concentration rapidly.
Summary of the invention:
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of fluorine concentration fast-check scale and fluorine concentration fast-check method are provided.
The objective of the invention is to solve through following technical scheme:
A kind of fluorine concentration fast-check scale, this scale are that 1200mm, width are that the hardboard of 40mm is processed by length, comprise the main shaft 1 of a long 1000mm; Main scale 2 on main shaft 1 left side; Complementary scale 3 on main shaft 1 the right, main scale 2 are current potential difference scales, and complementary scale 3 is F
-Concentration scale, the minimum scale of main scale 2 are 1mv, and the meter full scale of main scale 2 is 140mv-215mv, and the result who measures according to standard equation is marking the F on the complementary scale 3 with main scale 2 corresponding positions
-Concentration, the meter full scale of complementary scale 3 are the negative 0.06mg/l of 157.18mg/l-.
A kind of fluorine concentration fast-check method may further comprise the steps:
(1), the F of 1000mg/l
-Standard stoste: superfine NaF 105 ℃ of oven dry 2 hours, and after in exsiccator, being cooled to room temperature, is dissolved in pure water with 2.210 grams, and is diluted to one liter and is stored in the plastic bottle;
(2), PH ionic strength buffer liquid: two hydration sodium citrates 58.80 gram and sodium nitrate 85.00 restrained be dissolved in pure water and obtain 1 liter of solution;
(3), set up standard equation: prepare the F that 5 concentration are respectively 10mg/l, 20mg/l, 30mg/l, 40mg/l, 50mg/l
-Concentration standard liquid is used with sample and is measured the current potential difference E that identical method is measured each titer respectively, obtains E0 and K according to formula E=E0+ (2.303RT/ZF) lgC with linear regression method again, thereby draws standard equation:
C＝lg
-1[(E-E0)/K]
In the formula: E is the potential difference (PD) that records, and E0 is poor by the reference potential of measuring system decision, and R is a gas law constant, and F is a Faraday constant, and T is indoor absolute temperature 298K, and C is F
-Concentration, Z is by the valence number of measured ion;
(4), sample is measured: with 25ml transfer pipet water sampling 25ml, move in the 50ml volumetric flask of cleaning, add PH ionic strength buffer liquid 10ml; Be diluted to 50ml with pure water, shake up and pour in the clean 50ml plastic beaker, insert and clean F-electrode and the contrast electrode of drying; Stir; Behind to be shown the stablizing, the unit of reading potential difference E is mv, calculates F according to the E value by standard equation
-Concentration C, F
-The unit of concentration C is mg/l;
(5), make the fluorine concentration fast-check scale: getting a block length is 1200mm, and width is the hardboard of 40mm, and hardboard can be steel plate, plank or resin plate; The main line of axially being a long 1000mm along hardboard is made main scale 2 as main shaft 1 on main shaft 1 left side, makes complementary scale 3 on main shaft 1 the right; Main scale 2 be current potential difference scale; Complementary scale 3 is F-concentration scales, and the minimum scale of main scale 2 is 1mv, and the meter full scale of main scale 2 is 140mv-215mv; The result who measures according to standard equation marks the F-concentration on the complementary scale 3 in main scale 2 corresponding positions, makes the fluorine concentration fast-check scale;
(6), through measuring the current potential difference E in the water sample, in the fluorine concentration fast-check chi, check in fluorine concentration rapidly.
This fluorine concentration rapid assay methods has the following advantages:
1, shortens the time of measuring fluorine concentration in the waste water.
2, be convenient to timely countermeasure, reduce pollution environment.
Description of drawings:
Fig. 1 is a fluorine concentration fast-check chi synoptic diagram of the present invention;
Embodiment:
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
Referring to Fig. 1, a kind of fluorine concentration fast-check scale, this scale are that 1200mm, width are that the hardboard of 40mm is processed by length; The main shaft 1 that comprises a long 1000mm, the main scale 2 on main shaft 1 left side, complementary scale 3 on main shaft 1 the right; Main scale 2 is current potential difference scales, and complementary scale 3 is F
-Concentration scale, the minimum scale of main scale 2 are 1mv, and the meter full scale of main scale 2 is 140mv-215mv, and the result who measures according to standard equation is marking the F on the complementary scale 3 with main scale 2 corresponding positions
-Concentration, the meter full scale of complementary scale 3 are the negative 0.06mg/l of 157.18mg/l-.
A kind of fluorine concentration fast-check method may further comprise the steps:
(1), the F-standard stoste of 1000mg/l: superfine NaF 105 ℃ of oven dry 2 hours, and after in exsiccator, being cooled to room temperature, is dissolved in pure water with 2.210 grams, and is diluted to one liter and is stored in the plastic bottle;
(2), PH ionic strength buffer liquid: two hydration sodium citrates 58.80 gram and sodium nitrate 85.00 restrained be dissolved in pure water and obtain 1 liter of solution;
(3), set up standard equation: prepare the F that 5 concentration are respectively 10mg/l, 20mg/l, 30mg/l, 40mg/l, 50mg/l
-Concentration standard liquid is used with sample and is measured the current potential difference E that identical method is measured each titer respectively, obtains E0 and K according to formula E=E0+ (2.303RT/ZF) lgC with linear regression method again, thereby draws standard equation:
C＝lg
-1[(E-E0)/K]
In the formula: E is the potential difference (PD) that records, and E0 is poor by the reference potential of measuring system decision, and R is a gas law constant, and F is a Faraday constant, and T is indoor absolute temperature 298K, and C is F
-Concentration, Z is by the valence number of measured ion;
(4), sample is measured: with 25ml transfer pipet water sampling 25ml, move in the 50ml volumetric flask of cleaning, add PH ionic strength buffer liquid 10ml, be diluted to 50ml with pure water, shake up and pour in the clean 50ml plastic beaker, insert and clean the F that dries
-Electrode and contrast electrode stir, and behind to be shown the stablizing, the unit of reading potential difference E is mv, calculates F according to the E value by standard equation
-Concentration C, F
-The unit of concentration C is mg/l;
(5), make the fluorine concentration fast-check scale: getting a block length is 1200mm; Width is the hardboard of 40mm, and hardboard can be steel plate, plank or resin plate, and the main line of axially being a long 1000mm along hardboard is as main shaft 1; Make main scale 2 on main shaft 1 left side; Make complementary scale 3 on main shaft 1 the right, main scale 2 be current potential difference scale, complementary scale 3 is F
-Concentration scale, the minimum scale of main scale 2 are 1mv, and the meter full scale of main scale 2 is 140mv-215mv, and the result who measures according to standard equation marks the F-concentration on the complementary scale 3 in main scale 2 corresponding positions, makes the fluorine concentration fast-check scale;
(6), through measuring the current potential difference E in the water sample, in the fluorine concentration fast-check chi, check in fluorine concentration rapidly.
Above content is to combine concrete preferred implementation to further explain that the present invention did; Can not assert that embodiment of the present invention only limits to this; Those of ordinary skill for technical field under the present invention; Under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to the present invention and confirm scope of patent protection by claims of being submitted to.
Claims (1)
1. a fluorine concentration fast-check method is characterized in that, may further comprise the steps:
(1), the F of 1000mg/l
-Standard stoste: superfine NaF 105 ℃ of oven dry 2 hours, and after in exsiccator, being cooled to room temperature, is dissolved in pure water with 2.210 grams, and is diluted to one liter and is stored in the plastic bottle;
(2), PH ionic strength buffer liquid: two hydration sodium citrates 58.80 gram and sodium nitrate 85.00 restrained be dissolved in pure water and obtain 1 liter of solution;
(3), set up standard equation: prepare the F-concentration standard liquid that 5 concentration are respectively 10mg/l, 20mg/l, 30mg/l, 40mg/l, 50mg/l; Use with sample and measure the current potential difference E that identical method is measured each titer respectively; Obtain E0 according to formula E=E0+ (2.303RT/ZF) lgC with linear regression method again, thereby draw standard equation:
C＝1g
-1[(E-E0)/(2.303RT/ZF)]；
In the formula: E is the potential difference (PD) that records, and E0 is poor by the reference potential of measuring system decision, and R is a gas law constant, and F is a Faraday constant, and T is indoor absolute temperature 298K, and C is F
-Concentration, Z is by the valence number of measured ion;
(4), sample is measured: with 25ml transfer pipet water sampling 25ml, move in the 50ml volumetric flask of cleaning, add PH ionic strength buffer liquid 10ml, be diluted to 50ml with pure water, shake up and pour in the clean 50ml plastic beaker, insert and clean the F that dries
-Electrode and contrast electrode stir, and behind to be shown the stablizing, the unit of reading potential difference E is mv, calculates F according to the E value by standard equation
-Concentration C, F
-The unit of concentration C is mg/l;
(5), make the fluorine concentration fast-check scale: getting a block length is 1200mm, and width is the hardboard of 40mm, and hardboard can be steel plate, plank or resin plate; The main line of axially being a long 1000mm along hardboard is made main scale (2) as main shaft (1) on main shaft (1) left side, make complementary scale (3) on main shaft (1) the right; Main scale (2) be current potential difference scale; Complementary scale (3) is a F-concentration scale, and the minimum scale of main scale (2) is 1mv, and the meter full scale of main scale (2) is 140mv-215mv; According to the F-concentration of result on the corresponding position mark complementary scale (3) of main scale (2) that standard equation is measured, make the fluorine concentration fast-check scale; The meter full scale of said complementary scale (3) is the negative 0.06mg/l of 157.18mg/l-;
(6), through measuring the current potential difference E in the water sample, in the fluorine concentration fast-check scale, check in fluorine concentration rapidly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910021735 CN101514972B (en) | 2009-03-27 | 2009-03-27 | Fluorine concentration fast-check method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910021735 CN101514972B (en) | 2009-03-27 | 2009-03-27 | Fluorine concentration fast-check method |
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| CN101514972A CN101514972A (en) | 2009-08-26 |
| CN101514972B true CN101514972B (en) | 2012-12-05 |
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|---|---|---|---|
| CN 200910021735 Expired - Fee Related CN101514972B (en) | 2009-03-27 | 2009-03-27 | Fluorine concentration fast-check method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175745A (en) * | 2011-03-14 | 2011-09-07 | 天津师范大学 | Method for quickly detecting fluorine content in specific vegetables |
| CN102183555B (en) * | 2011-03-14 | 2013-12-25 | 天津师范大学 | Method for rapidly determining floride pollution of water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048585U (en) * | 1988-04-25 | 1989-11-29 | 北京市马连道粮食仓库 | Hydrogen phosphide pha, phb, phc series detecting tube |
| CN1052192A (en) * | 1989-11-27 | 1991-06-12 | 山东省文登市环境保护检测器材厂 | phosphine gas detecting tube |
| CN1514230A (en) * | 2002-12-31 | 2004-07-21 | 北京方盛世纪科技发展有限公司 | Formaldehyde gas detecting tube and its making method |
| CN2896273Y (en) * | 2006-05-10 | 2007-05-02 | 中国人民解放军军事医学科学院卫生学环境医学研究所 | Quick-acting detector capable of continuously, parallelly detecting multiple samples low-concentration formaldehyde |
-
2009
- 2009-03-27 CN CN 200910021735 patent/CN101514972B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048585U (en) * | 1988-04-25 | 1989-11-29 | 北京市马连道粮食仓库 | Hydrogen phosphide pha, phb, phc series detecting tube |
| CN1052192A (en) * | 1989-11-27 | 1991-06-12 | 山东省文登市环境保护检测器材厂 | phosphine gas detecting tube |
| CN1514230A (en) * | 2002-12-31 | 2004-07-21 | 北京方盛世纪科技发展有限公司 | Formaldehyde gas detecting tube and its making method |
| CN2896273Y (en) * | 2006-05-10 | 2007-05-02 | 中国人民解放军军事医学科学院卫生学环境医学研究所 | Quick-acting detector capable of continuously, parallelly detecting multiple samples low-concentration formaldehyde |
Non-Patent Citations (1)
| Title |
|---|
| 俞冰.电极法测定水中氟离子浓度研究.《东北电力技术》.2000,(第5期),24－26. * |
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