CN102419358A - Method for detecting chloride ion content in emulsion - Google Patents
Method for detecting chloride ion content in emulsion Download PDFInfo
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- CN102419358A CN102419358A CN2011102392263A CN201110239226A CN102419358A CN 102419358 A CN102419358 A CN 102419358A CN 2011102392263 A CN2011102392263 A CN 2011102392263A CN 201110239226 A CN201110239226 A CN 201110239226A CN 102419358 A CN102419358 A CN 102419358A
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- mercuric nitrate
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- 239000000839 emulsion Substances 0.000 title claims abstract description 70
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title abstract description 28
- ORMNPSYMZOGSSV-UHFFFAOYSA-N dinitrooxymercury Chemical compound [Hg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ORMNPSYMZOGSSV-UHFFFAOYSA-N 0.000 claims abstract description 83
- 238000004448 titration Methods 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000460 chlorine Substances 0.000 claims abstract description 17
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 14
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 12
- ZFWAHZCOKGWUIT-UHFFFAOYSA-N 1-anilino-3-phenyliminourea Chemical compound C=1C=CC=CC=1N=NC(=O)NNC1=CC=CC=C1 ZFWAHZCOKGWUIT-UHFFFAOYSA-N 0.000 claims description 8
- 241000370738 Chlorion Species 0.000 claims description 7
- 239000010731 rolling oil Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims 1
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 abstract description 18
- 229910001961 silver nitrate Inorganic materials 0.000 abstract description 9
- 238000005097 cold rolling Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 3
- 229910001987 mercury nitrate Inorganic materials 0.000 abstract 3
- DRXYRSRECMWYAV-UHFFFAOYSA-N nitrooxymercury Chemical compound [Hg+].[O-][N+]([O-])=O DRXYRSRECMWYAV-UHFFFAOYSA-N 0.000 abstract 3
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 235000010290 biphenyl Nutrition 0.000 abstract 1
- 239000004305 biphenyl Substances 0.000 abstract 1
- 125000006267 biphenyl group Chemical group 0.000 abstract 1
- XEVRDFDBXJMZFG-UHFFFAOYSA-N carbonyl dihydrazine Chemical compound NNC(=O)NN XEVRDFDBXJMZFG-UHFFFAOYSA-N 0.000 abstract 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 abstract 1
- SWGJCIMEBVHMTA-UHFFFAOYSA-K trisodium;6-oxido-4-sulfo-5-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulfonate Chemical compound [Na+].[Na+].[Na+].C1=CC=C2C(N=NC3=C4C(=CC(=CC4=CC=C3O)S([O-])(=O)=O)S([O-])(=O)=O)=CC=C(S([O-])(=O)=O)C2=C1 SWGJCIMEBVHMTA-UHFFFAOYSA-K 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 239000012086 standard solution Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 101710134784 Agnoprotein Proteins 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 241000972773 Aulopiformes Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 235000019515 salmon Nutrition 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a method for detecting the content of chloride ions in an emulsion, which comprises the following steps: taking the emulsion, and adding absolute ethyl alcohol into the emulsion; adjusting the pH value of the emulsion to 2.5-3.0 by using nitric acid, then dropwise adding diphenyl azo carbohydrazide into the emulsion as an indicator, and titrating by using a mercury nitrate aqueous solution until stable light purple red is used as an end point; after the titration is completed, the chloride ion content C is calculatedMercury nitrate×VMercury nitrate×MChlorine/VEmulsion liquid. The method adopts the mercuric nitrate titration method to replace the original silver nitrate titration method, and can be used for measuring the chlorine content in the stable emulsion and the semi-stable emulsion for cold rolling. Compared with the original method, the method has the advantages of simple operation, less time consumption, shortened detection time, small operation error, low cost and more benefit for application.
Description
Technical field
The present invention relates to the detection method of chloride ion content in a kind of emulsion, be specifically related to a kind of detection method of convenient, fast, chloride ion content that cost is low.
Background technology
In the cold-rolled process, because materials processing sclerosis, resistance of deformation increases, and draught pressure raises, and along with the raising of mill speed, roll heating.Therefore, must adopt the cold-rolling process lubrication technology that has lubricated and cooling effect concurrently, i.e. emulsion.By the emulsion that ROLLING OIL and water effect form, be widely used in the production run of cold rolled sheet, reducing friction, reduce draught pressure, cooling roll and control panel such as draw at the aspect, are bringing into play important effect.
Chlorion is invaded in the emulsion has certain corrosive attack to the band steel, can destroy the passivating film of belt steel surface and causes the belt steel surface local corrosion, and corrosion process is played catalytic action, so the amount of chlorion will carry out strict control, generally is lower than 50mg/L.
The method of existing chlorine detection ion is a silver nitrate titration method, needs earlier emulsion to be carried out carrying out titration again after breakdown of emulsion filters, and with the potassium chromate indicator.This operation is more loaded down with trivial details, height consuming time.And because silver nitrate resolution of precipitate loss, cause the chlorion can not be by titration easily, titration end-point be not obvious, particularly for the low emulsion of chloride ion content, can cause bigger analytical error, and it is relatively poor to measure precision.
Summary of the invention
In order to overcome the deficiency that exists in the existing detection method, the invention provides the detection method of chloride ion content in a kind of emulsion, this method cost is low, consuming time few, has improved work efficiency greatly.
The present invention adopts the mercuric nitrate complexometry method to replace existing silver nitrate titration method, has changed operation steps, obtained a kind of consuming time less, detection method that cost is low, its concrete technical scheme is following:
The detection method of chloride ion content in a kind of emulsion is characterized in that may further comprise the steps:
(1) gets emulsion, to wherein adding absolute ethyl alcohol;
(2) reconcile emulsion pH to 2.5～3.0 with nitric acid, in emulsion, drip diphenyl carbazone then, use mercuric nitrate WS titration to stable light violet magenta to be terminal point as indicator;
(3) after titration is accomplished, according to computes chloride ion content: chlorinity=C
Mercuric nitrate* V
Mercuric nitrate* M
Chlorine/ V
Emulsion,Wherein, C
Mercuric nitrateBe the amount of substance concentration of mercuric nitrate solution, V
Mercuric nitrateBe the volume of the mercuric nitrate solution that titration consumed, M
ChlorineBe the molal weight of chlorine, V
EmulsionVolume for the emulsion got.
The addition of the absolute ethyl alcohol that the present invention is used is 1～1.5 times of emulsion volume, and the purpose that adds ethanol is that the oil phase in the emulsion can be mixed with ethanol, guarantees that the mercuric nitrate of titration and the chlorion of emulsion aqueous phase fully contact.
Used concentration of nitric acid is 0.1mol/L～0.3mol/L, and the concentration of used mercuric nitrate solution is 0.01～0.02 mol/L.
The present invention preferably detects step: get emulsion sample 20ml or 25ml; Place container; Add the 30ml absolute ethyl alcohol and shake up, regulate pH to 2.5～3.0 with the nitric acid of 0.2mol/L, the diphenyl carbazone solution that drips 3 0.5wt% is again made indicator; Use mercuric nitrate solution titration to the stable light violet magenta of 0.0141 mol/L to be terminal point then, chloride ion content is calculated by calculating formula in the intact back of titration.
Above-mentioned detection method is applicable to the detection of chlorion in stable emulsion of cold rolling usefulness and the semi-stability property emulsion; Chloride ion content testing result when 10～100mg/L scope is accurate during detection; It is big to surpass this range detection error, can not adopt this method to detect.In addition, the said determination method is only applicable to the ROLLING OIL volumetric concentration and detects smaller or equal to 10% emulsion.
Stipulate in the industry, when carrying out the chlorion detection, same two the parallel analysis results' in laboratory difference; Should meet following table 1 regulation,, detect again again if outside tolerance; Do parallel laboratory test simultaneously; Adopt method of the present invention to carry out a large amount of detection tests, the tolerance of gained all within the industry regulation, meets the demands.
The present invention adopts the mercuric nitrate complexometry method to replace original silver nitrate titration method, can be used for the mensuration of chlorinity in stable emulsion of cold rolling usefulness and the semi-stability property emulsion.Compare with original method, this method is simple to operate, and is consuming time few, shortened detection time, and operate miss is little, cost is low, is beneficial to application more.
Embodiment
Through specific embodiment the present invention is further set forth below, should be understood that, following explanation only is in order to explain the present invention, its content not to be limited.
The mercuric nitrate solution of using among the following embodiment needs existing preparation to demarcate; The demarcation solutions employed is a Klorvess Liquid; The Klorvess Liquid compound method: take by weighing 1.0512g benchmark potassium chloride (through 110 ℃ of oven dry, placing exsiccator to be chilled to room temperature), water-soluble back moves in the 1000ml volumetric flask; Water is rare to scale, mixing.Mercuric nitrate solution compound method: take by weighing 2.352gHg (NO3) 21/2H2O and be dissolved in the 100ml water, add 5ml nitric acid, be diluted to 1000ml, be stored in and treat in the brown bottle to demarcate again after several days with water.
Timing signal pipettes three parts of 20.00ml potassium chloride standard solution, places the 300ml Erlenmeyer flask respectively; Add 3 sym.-diphenylcarbazone solution, transfer to pH=2.5～3.0 of solution, drip to stable light violet magenta with the mercuric nitrate standard solution with the salpeter solution of 0.2 mol/L; The extreme difference value of three parts of mercuric nitrate standard solution milliliter numbers that solution consumed is no more than 0.05ml, averages, and is calculated as follows: C=0.0141 * 20.00/V; In the formula: C-mercuric nitrate standard solution amount of substance concentration; Mol/L, V-demarcation consumes the average external volume of mercuric nitrate standard solution, ml.
The inventive method is applicable to the mensuration of chlorinity in stable emulsion of cold rolling usefulness and the semi-stability property emulsion, does not detect greater than 10% sample but be suitable for oil concentration in the emulsion.Be example with following emulsion below; Set forth detection method of the present invention; Emulsion is formed: 1, ROLLING OIL 2, desalted water; ROLLING OIL consists of: a, base oil: mineral oil, grease (vegetable and animals oils), synthetic fat, b, various adjuvant: withstand voltage dose, oiliness improver, emulsifying agent, rust preventive, acidifying prevent agent, and chloride ion content is between 10～50mg/L in the emulsion.
Embodiment 1
Is example with chlorinity at the emulsion of 10～50mg/L, adopts mercuric nitrate complexometry method of the present invention and existing silver nitrate titration method to carry out Determination of chlorine ion content respectively.
1, adopts
The mercuric nitrate complexometry method, carry out 3 groups of parallel experiments simultaneously, step comprises: pipette emulsion sample 20ml with graduated cylinder, place the 250ml conical flask, add the 30ml absolute ethyl alcohol and shake up; Nitric acid with 0.2mol/L is reconciled pH to 2.5～3.0; The diphenyl carbazone solution that adds 3 0.5wt% is again made indicator; Use the microburette of scale division value as 0.02ml; Use mercuric nitrate solution titration to the stable light violet magenta of 0.0141 mol/L to be terminal point, be calculated as follows chlorinity after titration is accomplished: chlorinity (mg/L)=C
Mercuric nitrate* V
Mercuric nitrate* M
Chlorine/ V
Emulsion=0.014mol/L * V
Mercuric nitrateMl * 35.45g/mol * 10
3/ 20ml.
The volume of three groups of used mercuric nitrate solution is respectively 1.92ml, 1.96ml and 2.00ml, calculates chlorinity Cl=47.99mg/L, 48.98mg/L and 49.98mg/L in the emulsion respectively, and mean value is 48.98 mg/L.
2, adopt
Silver nitrate titration method,Carry out 3 groups of parallel experiments simultaneously, step comprises: draw the emulsion of 50ml, add 5.000g sodium nitrate; Heating demulsification type, filtration; Pipette 50ml distilled water filter wash paper, discard deposition, in filtrating, add 1 of 0.5wt% phenolphthalein indicator; It is red to be adjusted to appearance with 0.3mol/L NaOH solution, uses 0.3 mol/L HNO again
3Transfer to neutrality, add 1ml potassium chromate (5wt%), use the 0.05mol/L liquor argenti nitratis ophthalmicus to drip to occurring stablizing light salmon pink and be terminal point, record titration volume replaces test to carry out blank test with distilled water again; After titration is accomplished, adopt formula to calculate chloride ion content: chlorinity (mg/L)=C
Silver nitrate* (V
1-V
2) * M
Chlorine/ V
Emulsion=0.0141mol/L * (V
1-V
2) ml * 35.45 g/mol * 10
3/ 50ml, wherein, C
Silver nitrateBe liquor argenti nitratis ophthalmicus amount of substance concentration (mol/L), V
1For the titration emulsion consumes AgNO
3Liquor capacity (ml), V
2For blank test consumes AgNO
3Liquor capacity (ml), M
ChlorineBe the molal weight (g/mol) of chlorine, V
EmulsionVolume (ml) for emulsion.
The chlorinity in the emulsion is detected used AgNO with top method
3The volume of solution is counted V
2=0.1 ml, V
1=1.48ml, V
1=1.50ml and V
1=1.42ml calculates chlorinity Cl=48.92mg/L, 49.63mg/L and 46.79mg/L in the emulsion, and mean value is 48.45 mg/L.
Can find out that from top method step of the present invention is succinct, simple to operate, operate miss is little, in addition, amount consuming time, cost and the toxicity size of the present invention and existing method has been carried out the comparative evaluation, its result such as following table:
Embodiment 2
Is example with chlorinity at the emulsion of 50～100mg/L, adopts mercuric nitrate complexometry method of the present invention, carries out 3 groups of parallel experiments simultaneously, and step comprises: pipette emulsion sample 20ml with graduated cylinder, place the 250ml conical flask, add the 30ml absolute ethyl alcohol and shake up; Nitric acid with 0.2mol/L is reconciled pH to 2.5～3.0; The diphenyl carbazone solution that adds 3 0.5wt% is again made indicator; Use the microburette of scale division value as 0.02ml; Use mercuric nitrate solution titration to the stable light violet magenta of 0.0141 mol/L to be terminal point, be calculated as follows chlorinity after titration is accomplished: chlorinity (mg/L)=C
Mercuric nitrate* V
Mercuric nitrate* M
Chlorine/ V
Emulsion=0.014mol/L * V
Mercuric nitrateMl * 35.45g/mol * 10
3/ 20ml.
The volume of three groups of used mercuric nitrate solution is respectively 2.64ml, 2.70ml and 2.80ml, calculates chlorinity Cl=65.98mg/L, 67.48mg/L and 69.98mg/L in the emulsion respectively, and mean value is 67.81mg/L.
Embodiment 3
Is example with chlorinity at the emulsion of 10～50mg/L, adopts mercuric nitrate complexometry method of the present invention, carries out 2 groups of parallel experiments simultaneously, and step comprises: pipette emulsion sample 25ml with graduated cylinder, place the 250ml conical flask, add the 30ml absolute ethyl alcohol and shake up; Nitric acid with 0.1mol/L is reconciled pH to 2.5～3.0; The diphenyl carbazone solution that adds 3 0.5wt% is again made indicator; Use the microburette of scale division value as 0.02ml; Use mercuric nitrate solution titration to the stable light violet magenta of 0.01 mol/L to be terminal point, calculate chlorinity after titration is accomplished and be respectively 47.11mg/L and 49.19mg/L, mean value is 48.15mg/L.
Embodiment 4
Is example with chlorinity at the emulsion of 50～100mg/L, adopts mercuric nitrate complexometry method of the present invention, carries out 2 groups of parallel experiments simultaneously, and step comprises: pipette emulsion sample 25ml with graduated cylinder, place the 250ml conical flask, add the 25ml absolute ethyl alcohol and shake up; Nitric acid with 0.3mol/L is reconciled pH to 2.5～3.0; The diphenyl carbazone solution that adds 3 0.5wt% is again made indicator; Use the microburette of scale division value as 0.02ml; Use mercuric nitrate solution titration to the stable light violet magenta of 0.02mol/L to be terminal point, calculate chlorinity after titration is accomplished and be respectively 65.67mg/L and 69.89mg/L, mean value is 67.78mg/L.
Can find out that from the foregoing description step of the present invention is succinct, has significantly reduced detection time, has improved detection efficiency, and the error that detects satisfies industry requirement, easy to utilize.
Claims (7)
1. the detection method of chloride ion content in the emulsion is characterized in that may further comprise the steps:
(1) gets emulsion, to wherein adding absolute ethyl alcohol;
(2) reconcile emulsion pH to 2.5～3.0 with nitric acid, in emulsion, drip diphenyl carbazone then, use mercuric nitrate WS titration to stable light violet magenta to be terminal point as indicator;
(3) after titration is accomplished, according to computes chloride ion content: chlorinity=C
Mercuric nitrate* V
Mercuric nitrate* M
Chlorine/ V
Emulsion,Wherein, C
Mercuric nitrateBe the amount of substance concentration of mercuric nitrate solution, V
Mercuric nitrateBe the volume of the mercuric nitrate solution that titration consumed, M
ChlorineBe the molal weight of chlorine, V
EmulsionVolume for the emulsion got.
2. detection method according to claim 1 is characterized in that: the addition of absolute ethyl alcohol is 1～1.5 times of emulsion volume.
3. detection method according to claim 1 is characterized in that: concentration of nitric acid is 0.1mol/L～0.3mol/L.
4. detection method according to claim 1 is characterized in that: the concentration of mercuric nitrate solution is 0.01～0.02 mol/L.
5. detection method according to claim 1 is characterized in that: the chlorion scope is 10～100mg/L in the mensuration emulsion.
6. detection method according to claim 1 is characterized in that: the ROLLING OIL volumetric concentration is smaller or equal to 10% in the emulsion.
7. detection method according to claim 1; It is characterized in that may further comprise the steps: get emulsion sample 20ml or 25ml, place container, add the 30ml absolute ethyl alcohol and shake up; Nitric acid with 0.2mol/L is regulated pH to 2.5～3.0; The diphenyl carbazone solution that drips 3 0.5wt% is again made indicator, uses mercuric nitrate solution titration to the stable light violet magenta of 0.0141 mol/L to be terminal point then, and chloride ion content is calculated by calculating formula in the intact back of titration.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645274A (en) * | 2013-12-03 | 2014-03-19 | 河北钢铁股份有限公司邯郸分公司 | Method for determining content of chlorine ion in cold-rolled emulsified liquid |
| CN104781653A (en) * | 2012-11-06 | 2015-07-15 | 栗田工业株式会社 | Method for automatically measuring concentration of dissolved substance |
| CN105842387A (en) * | 2015-01-12 | 2016-08-10 | 内蒙古包钢钢联股份有限公司 | Method for measuring chloride ions in iron oxide powder through precipitation titration |
| CN106769388A (en) * | 2016-12-23 | 2017-05-31 | 大工（青岛）新能源材料技术研究院有限公司 | The processing detection method of Mercury In Cosmetics content |
| CN112378901A (en) * | 2020-10-27 | 2021-02-19 | 西北矿冶研究院 | Chemical analysis method for determining chloride ions in metal copper by utilizing behavior of generated molecular crystals to restrain specific ions |
| CN115639312A (en) * | 2021-07-20 | 2023-01-24 | 中核北方核燃料元件有限公司 | Method for determining content of chlorine in uranium tetrachloride |
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