CN103954620A - Method for detecting pH value of trichloro ethylene - Google Patents
Method for detecting pH value of trichloro ethylene Download PDFInfo
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- CN103954620A CN103954620A CN201410200060.8A CN201410200060A CN103954620A CN 103954620 A CN103954620 A CN 103954620A CN 201410200060 A CN201410200060 A CN 201410200060A CN 103954620 A CN103954620 A CN 103954620A
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- triclene
- graduated cylinder
- trichloro ethylene
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- special indicator
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Abstract
The method provides a method for detecting the pH value of trichloro ethylene. The method comprises the following steps: (1) preparing a special indicator for the acidity of trichloro ethylene; (2) preparing a special indicator for the alkalinity of the trichloro ethylene; (3) transferring 5ml of the trichloro ethylene to be detected by using a transfer pipette in a 100ml measuring cylinder, adding 5ml of special indicator for the acidity of the trichloro ethylene into the measuring cylinder, shaking uniformly, standing aside for 3-5min, observing the color of upper-layer liquid in the measuring cylinder, if the liquid color is white green, the pH value of the trichloro ethylene is less than 5; and (5) transferring 5ml of the trichloro ethylene to be detected by using the transfer pipette in the 100ml measuring cylinder, adding 5ml of the special indicator for the alkalinity of the trichloro ethylene into the measuring cylinder, shaking uniformly, standing aside for 3-5min, and observing the color of upper-layer liquid in the measuring cylinder, if the liquid color is zinzolin, the pH value of the trichloro ethylene is more than 8.
Description
Technical field
The present invention relates to a kind of method that detects triclene potential of hydrogen.
Background technology
Triclene is water insoluble, and stable performance is nonflammable, is a kind of good solvent, as extractants such as the degreasing agent of metal and fat, oil, paraffin.In aeromotor repair procedures, mainly utilize trichloroethylene steam to clean the greasy dirt on engine component, there is simple process, cost is low, efficiency is high, cleaning quality is good.When trichloroethylene steam oil removing, triclene contacts with aluminum hardware with steel-iron components, if triclene potential of hydrogen increases, will cause the rust corrosion of part, therefore in oil removing process, needs timing to carry out the inspection of triclene potential of hydrogen.The method that detects at present triclene potential of hydrogen is mainly that preparing standard solution carries out Acid and Alkali Titration Analysis, the environmental requirement in preparation, sedimentation and concentration calibration process of these standard solution and indicator is strict, preparatory period is long, the life cycle of standard solution is short simultaneously, in process of the test, need to use acid, alkali dropper, densitometer, acidometer, day equality auxiliary appliance, instrument, detection time, long (needing 2～3 day time), was not suitable for the quick inspection of inter process.
Summary of the invention
The object of this invention is to provide a kind of method for quick of triclene potential of hydrogen, can judge fast triclene potential of hydrogen.
The method of a kind of fast detecting triclene degreasing fluid potential of hydrogen provided by the invention, comprises the steps:
(1) the special indicator of preparation triclene acidity, accurately pipetting 4mL concentration with transfer pipet is that the hydrochloric acid standard solution of 0.1 mol/L is placed in the volumetric flask that capacity is 1L, add the coeruleum bromocresolis solution that 900mL distilled water and 5mL concentration are 0.1%, the groove with distilled water diluting to 1L, shakes up again;
(2) the special indicator of preparation triclene basicity, accurately pipetting 4mL concentration with transfer pipet is that the hydrochloric acid standard solution of 0.1 mol/L is placed in the volumetric flask that capacity is 1L, add again the cresol red indicator that 900mL distilled water and 5mL concentration are 0.1%,, shake up to groove with distilled water diluting;
(3) accurately pipette 5mL triclene to be detected with transfer pipet and be placed in the graduated cylinder that capacity is 100mL, then in graduated cylinder, add the special indicator of 5mL triclene acidity, shake up, leave standstill after 3～5min, observe the graduated cylinder color of liquid at the middle and upper levels, if liquid color is white green, represent that the pH value of this triclene is less than 5;
(4) accurately pipette 5mL triclene to be detected with transfer pipet and be placed in the graduated cylinder that capacity is 100mL, then in graduated cylinder, add the special indicator of 5mL triclene basicity, shake up, leave standstill after 3～5min, observe the graduated cylinder color of liquid at the middle and upper levels, if liquid color is aubergine, represent that the pH value of this triclene is greater than 8.
The present invention has following beneficial effect: according to the inventive method and criterion, utilize the special indicator Fast Measurement of triclene potential of hydrogen triclene potential of hydrogen, do not need soda acid dropper, densitometer, acidometer, day equality auxiliary appliance and instrument, minute is short, need to be only that the potential of hydrogen that just can complete triclene about 5 minutes is measured, be applicable to large-scale need of production, be particularly suitable for production run inspection.
Claims (1)
1. a method that detects triclene potential of hydrogen, comprises the steps:
(1) the special indicator of preparation triclene acidity, accurately pipetting 4mL concentration with transfer pipet is that the hydrochloric acid standard solution of 0.1 mol/L is placed in the volumetric flask that capacity is 1L, add the coeruleum bromocresolis solution that 900mL distilled water and 5mL concentration are 0.1%, the groove with distilled water diluting to 1L, shakes up again;
(2) the special indicator of preparation triclene basicity, accurately pipetting 4mL concentration with transfer pipet is that the hydrochloric acid standard solution of 0.1 mol/L is placed in the volumetric flask that capacity is 1L, add again the cresol red indicator that 900mL distilled water and 5mL concentration are 0.1%,, shake up to groove with distilled water diluting;
(3) accurately pipette 5mL triclene to be detected with transfer pipet and be placed in the graduated cylinder that capacity is 100mL, then in graduated cylinder, add the special indicator of 5mL triclene acidity, shake up, leave standstill after 3～5min, observe the graduated cylinder color of liquid at the middle and upper levels, if liquid color is white green, represent that the pH value of this triclene is less than 5;
(4) accurately pipette 5mL triclene to be detected with transfer pipet and be placed in the graduated cylinder that capacity is 100mL, then in graduated cylinder, add the special indicator of 5mL triclene basicity, shake up, leave standstill after 3～5min, observe the graduated cylinder color of liquid at the middle and upper levels, if liquid color is aubergine, represent that the pH value of this triclene is greater than 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200060.8A CN103954620A (en) | 2014-05-13 | 2014-05-13 | Method for detecting pH value of trichloro ethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200060.8A CN103954620A (en) | 2014-05-13 | 2014-05-13 | Method for detecting pH value of trichloro ethylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103954620A true CN103954620A (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410200060.8A Pending CN103954620A (en) | 2014-05-13 | 2014-05-13 | Method for detecting pH value of trichloro ethylene |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931495A (en) * | 2015-06-30 | 2015-09-23 | 苏州东辰林达检测技术有限公司 | Vinyl chloride detecting reagent and using method thereof |
| CN110455792A (en) * | 2019-08-21 | 2019-11-15 | 启盘科技发展(上海)有限公司 | Basicity concentration quick detection reagent and its detection method in a kind of water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281140A (en) * | 2008-01-10 | 2008-10-08 | 浙江传化股份有限公司 | Rapid measuring method of fabric pH value |
| CN101441179A (en) * | 2008-12-11 | 2009-05-27 | 华南师范大学 | Light sound acidity-basicity imaging method and apparatus based on reagent colour development difference |
| CN102645412A (en) * | 2011-02-18 | 2012-08-22 | 日本光电工业株式会社 | Method and apparatus for measuring pH of solution |
-
2014
- 2014-05-13 CN CN201410200060.8A patent/CN103954620A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281140A (en) * | 2008-01-10 | 2008-10-08 | 浙江传化股份有限公司 | Rapid measuring method of fabric pH value |
| CN101441179A (en) * | 2008-12-11 | 2009-05-27 | 华南师范大学 | Light sound acidity-basicity imaging method and apparatus based on reagent colour development difference |
| CN102645412A (en) * | 2011-02-18 | 2012-08-22 | 日本光电工业株式会社 | Method and apparatus for measuring pH of solution |
Non-Patent Citations (1)
| Title |
|---|
| 未知: "《百度文库》", 9 March 2010 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931495A (en) * | 2015-06-30 | 2015-09-23 | 苏州东辰林达检测技术有限公司 | Vinyl chloride detecting reagent and using method thereof |
| CN110455792A (en) * | 2019-08-21 | 2019-11-15 | 启盘科技发展(上海)有限公司 | Basicity concentration quick detection reagent and its detection method in a kind of water |
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Application publication date: 20140730 |
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