CN85100454B

CN85100454B - Volumetric apparatus

Info

Publication number: CN85100454B
Application number: CN85100454A
Authority: CN
Inventors: 吴晨钟
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-04-01
Filing date: 1985-04-01
Publication date: 1987-11-04
Also published as: CN85100454A

Abstract

The present invention relates to a volumeter, namely an analyzing device for volumetric measurement in a chemical analysis. The volumeter utilizes one a teflon tube with the length of more than 1 meter and a consistent inner diameter, the volume of the teflon tube is from 0.1 ml to 10 ml, and the teflon tube is coiled in a scale disk with milliliter graduations; about 2 graduations of pure mercury is filled at the zero mark of the teflon tube and is used as a marker for partitioning gas inside the teflon tube and gas outside the teflon tube. A graduated tube is connected with a titration tube or a gas generator to measure the change value of measure liquid or gas; a liquid bottle is inserted into the upper part of the titration tube, and a floating plug capable of regulating the zero point is arranged at the joint of the titration tube and the graduated tube. The volumeter has the main technical characteristics that the volumeter is a trace volume analyzing device with high accuracy and can test components with the content of 1 ppm to 90 percent.

Description

Volumeter

Volumeter is a kind of chemical analysis instrument, use for liquid or gas volume changing value in the mensuration chemical reaction, the particularly suitable microanalysis, it and conventional buret compare: buret is in the macro-analysis of measuring high component, its accuracy is higher than most analytical instrument, but because vitreous buret, adopt traditional fluid column drop reading, for keeping the titration accuracy, bore can not make too small, and graduated tube can not be too short, scale volume big (general 10～50 milliliters), therefore buret sensitivity is low, and an a time is long, consumes a large amount of reagent.In recent years vitreous syringe type buret occurs similar shortcoming is also arranged.The present invention adopts internal diameter 0.3～3mm, and the plastic tube of length 1.2～1.5m is made the milliliter graduated tube of metering usefulness, with the mark of globule as the reading of gas inside and outside the separating tube, the fluid column reading of buret is converted to the gas column reading.Promptly measuring the volume that enters gas in the pipe in titration process comes standard to ooze the volume of solution.Because volume reduces, thereby the graduated tube lengthening has improved the accuracy of analyzing to a certain extent, has saved reagent, and makes a sample required time of titration shorten to original 1/3～1/6.But utilize volumeter detection level of the present invention from 1,000,000/to the component more than 90 percent, use also very convenient.

Volumeter is as shown in drawings: 1 is the standard solution liquid storage bottle, and 2 insert the minim pipettes of liquid storage bottle for the upper end, and it oozes mouth 16 by T-valve 12, Liquid dropping bottle 13 and upper end bend pipe 14, floating plug 3, U trap 15 and minim pipette lower end and is constituted.When solution was filled with Liquid dropping bottle 13 by U trap 15, floating plug 3 was blocked Liquid dropping bottle upper end bend pipe 14, and solution stops to enter.Bend pipe 14 is connected on the end bubble pipe 5 of graduated tube 4 by connecting pipe 10, graduated tube is to be coiled in the spiral groove of index dial 6, groove one side has corresponding milliliter number of division, at graduated tube other end scale zero place, inject the pure mercury 17 of about two little calibration, as the reading index thing, the bubble pipe 5 that expand at the middle part at graduated tube two ends can prevent that globule from skidding off outside the pipe.Bubble pipe on zeromark connects air conduit 8, inserts gas box 7(gas box and is used to filter micronic dust and Trace Mercury steam), gas box one side has an air inlet/outlet 9, and each connector of pipeline must not leak gas.Gas box 7 is positioned under the index dial 6.

When twisting T-valve solution oozed, the graduated tube outer air flow to by conduit 8 and fills up, and promoted globule simultaneously and moved to the minim pipette direction, closed three-way valve when the titration termination, and milliliter number of globule halt is the volume that oozes solution.As measure the volume that gas takes place.Connecting pipe 10 is connected the pipe of locating bubble pipe and gas generator 11 zero point to get final product.

Material is selected: liquid storage bottle, minim pipette, bubble pipe can adopt glass or fluorine plastic tube manufacturing.The most handy fluorine plastic tube manufacturing of graduated tube.The most handy poly (methyl methacrylate) plate of index dial or gentle box die sinking tool injection moulding one-shot forming.About 400 milliliters of gas box volume.Volumeter generally can be made into 0.1,1,5,10 milliliter of multiple model.Scribing of graduated tube: earlier graduated tube is cleaned oven dry, inject pure mercury, accurately measure mercury column length, accurately claim mercury heavy again, calculate the mercury column volume according to temperature, densitometer at that time and scribe, as the bore unanimity, but making sheet printing scale.Ooze mouth lower port internal diameter and be not more than 0.3mm.

Claims

1, a kind of volumeter that is used for measuring chemical reaction liquid or gas volume changing value is characterized in that by constituting with the lower part:

(1) holds and drip the minim pipette 2 of putting standard solution.It comprises T-valve 12, floating plug 3, Liquid dropping bottle 13, Liquid dropping bottle upper end bend pipe 14, U trap 15 and oozes mouth 16;

(2) one ends link to each other with Liquid dropping bottle upper end bend pipe 14 by connecting pipe 10, are used for the graduated tube 4 of metered volume changing value, are an elongated flexible plastic pipe;

(3) the fixing index dial 6 of graduated tube 4 is a band spiral groove and the circular slab that indicates milliliter scale, and graduated tube 4 is coiled in the above-mentioned spiral groove;

(4) other end with graduated tube 4 links to each other, the gas box 7 that is used to purify air.Have a upper interface and a side gas inlet and outlet 9;

(5) be positioned among the graduated tube as the globule 17 of reading index thing and

(6) be positioned at graduated tube 4 two ends, prevent the bubble pipe 5 that globule skids off.Be that pipe for spherical both ends open is expanded at a middle part.

2, volumeter according to claim 1 is characterized by gas box 7 and is positioned under the index dial 6.