Mass titration device with titration protective component and titration method

A titration device and quality technology, applied in the field of chemical analysis, can solve problems such as complex measurement process, interference of titration end point, and influence on the correctness of measurement results, and achieve the effect of wide adaptability and lightening work intensity

Inactive Publication Date: 2014-07-23
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The measurement process is complicated, and the measurement liquid is exposed to the air for a long time, but the H 3 BO 3 has a dissociation constant comparable to that of carbonic acid, so CO in air 2 There is a very serious interference to the titration end point, which directly affects the correctness of the measurement results

Method used

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  • Mass titration device with titration protective component and titration method
  • Mass titration device with titration protective component and titration method
  • Mass titration device with titration protective component and titration method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 , Figure 4 with Figure 5 Shown, a kind of mass titration device with titration protection assembly, described device comprises balance 1, titration bottle and base 2, and described balance 1 is used for weighing titration bottle and base 2;

[0049] Described titration bottle comprises bottle body 3, and described bottle body 3 is provided with cock cavity 4, and cock cavity 4 links to each other with leaky tube 5 and the sleeve pipe 6 that is enclosed within on the leaky tube 5; Described cock cavity 4 built-in cock 7, so The cock 7 is provided with a communication hole 10, and when the cock 7 rotates to the communication position, the communication hole 10 connects the bottle body 3 and the drain pipe 5;

[0050] The outside of the end of the casing 6 is frosted to form a ground plug 8;

[0051] Such as figure 2 , Image 6 with Figure 7 As shown, the device also includes a ground-mouth Erlenmeyer flask 11 and a connecting pipe 12, the connec...

Embodiment 2

[0063] The connection pipe of this embodiment is different from the connection pipe structure in embodiment 1, and others are all the same, as image 3 with Figure 8 As shown, the connecting pipe 12 is provided with an air inlet pipe 15 and an air outlet pipe 16, and the air inlet pipe 15 and the air outlet pipe 16 are used to feed inert gas into the Erlenmeyer flask 11 to protect the solution to be calibrated.

[0064] The titration or pipetting process of this embodiment is as follows: when titrating, first place the titration bottle on the base to add the standard solution or the solution to be calibrated, then place it on the balance together with the base to record the balance reading, and weigh the solution to be calibrated or the standard solution Put it into the ground-mouth conical flask, place the connecting tube on the ground-mouth conical flask, connect the air inlet pipe to the inert gas, remove the titration bottle from the base, place it on the connecting tube,...

Embodiment 3

[0066] Prepare Na 2 B 4 o 7 Reference solution: high purity Na 2 B 4 o 7 10H 2 O (content ≥ 99.99%) is very easy to lose crystal water in an environment with a relative humidity RH ≤ 60%, thus affecting the standard Na 2 B 4 o 7 The exact concentration of the solution will affect the concentration of the calibration NaOH, so we will use high-purity NaOH 2 B 4 o 7 10H 2 O is stored in a desiccator filled with NaCl and sucrose saturated solution, the water vapor pressure of NaCl and sucrose saturated solution can maintain the RH≥60% environment of the upper air, and the standard Na 2 B 4 o 7 solution. Accurately weigh 4.1481g with an analytical balance, dissolve and wash with a certain amount of secondary water, accurately measure to obtain a 208.7658 solution, and dilute with 242.0268g of water to obtain 450.7926g of borax standard solution with a concentration of 0.027602mol kg -1 (Solution) 1# borax standard solution, stored in tetrafluoroethylene bottle for la...

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Abstract

The invention discloses a mass titration device with a titration protective component and a titration method. The device comprises a balance scale, a titration bottle, a base, a polished opening conical bottle and a connecting pipe, wherein the balance scale is used for weighing the titration bottle and the base; the titration bottle comprises a bottle body, and a cock cavity is arranged below the bottle body, is connected with a leakage pipe and a casing pipe sleeving the casing pipe, and is internally provided with a cock; the cock is provided with a communicating hole; when the cock rotates to the communicating part, the communicating hole communicates the bottle body and the leakage pipe; the outer side of the end head of the casing pipe is polished to form a polishing opening plug; the connecting pipe is connected with a filter or an inert gas, and is used for connecting the titration bottle with the conical bottle; the length of the leakage pipe is greater than the total length of the casing pipe and the connecting pipe which are connected with each other; the base and one end of the connecting pipe are provided with polishing openings matched with the polishing opening plug. According to the invention, the titration process can be protected, interference factors of titration can be eliminated, and the measurement is accurate.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, in particular, the invention relates to a mass titration device and a titration method with a titration protection component. Background technique [0002] So far, volumetric titration is mostly used in constant chemical analysis in various countries in the world. However, there are some defects in the volumetric analysis method, such as the uneven thickness of the inner wall of the grade A burette, which is spiral tubular, the scale is uneven, it is easy to catch the liquid, and it is accompanied by a certain degree of evaporation, the error of the visual reading is large, and it can measure up to 4 significant digits. The accuracy of volumetric titration is limited. [0003] The burets used in the classical volumetric method are divided into acid-type and alkaline-type burettes. The former is used to measure liquid reagents that corrode glass tubes; the latter is used to measure liqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
Inventor 戈海文姚燕房春晖房艳周永全刘红艳
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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