JPS5917145A - Galvanic cell type oxygen concentration meter - Google Patents

Abstract

PURPOSE:To obtain an oxygen concn. meter having a long service life by using a metal (oxide) capable of reducing oxygen highly actively as a positive pole and lead as a negative pole, and using a mixed aqueous solution of an acetic acid, lead compound and alkali metallic salt or NH4 salt of a specified organic acid as an electrolyte. CONSTITUTION:In the galvanic cell type oxygen concn. meter, the metal such as Pt plate capable of reducing oxygen highly actively or the metal oxide is used as the positive pole 1, the lead as the negative pole 2, and a diaphragm 4 consisting of a copolymer such as F2C=CF2 and H2C=CH2 is fixed to a holder 6 made of PVC, etc. by an O-ring 5. The electrolyte of the concn. meter is the mixed aqueous solution of the acetic acid, PbO, the alkali metallic salt or the NH4 salt of the organic acid such as formic acid, acetic acid, propionic acid, butyric acid, maleic acid and glutamic acid, etc. In such a way, H2 generation is prevented, the precipitation of lead carbonate, etc. is not caused by CO2 in an outer atmosphere, the solubility of PbO is large. Thus the titled meter which is safer than conventional meter and has a long service life is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a zurban battery type oxygen meter (1).
The purpose of this is to provide a long oxygen concentration meter with a diameter of 6η that is not sensitive to the effects of carbon dioxide contained in the gas being detected.
The curved oxygen concentration meter is generally convenient and easy to use.

The principle is that oxygen's ``E gas has an effect on the chemical origin from the α group.
l positive 6 boundary and along l [ro negative [saku and ″r shōkai rlt and ↑
There is a constant resistance between the 1st floor of the city oil and the color painting consisting of the gap between the two d self [TV to the 1 day painting & the 4 vortices of the element '+] oxygen-lead'' city oil Connection 1-1 takes advantage of the fact that there is linearity between the mold surface flowing there and the M/element concentration.

Conventional Nocarbani Kameike acid@Concentration II□t1 has two drawbacks. One is that it has a very long lifespan of 6 to 10 months, and the other is that it has a relatively long life span of 6 to 10 months.
It cannot be used in i1 gas.

Or, the previous song may be shortened by one width.

This disadvantage arises from the fact that the conventional oxygen concentration meter uses an mh alkaline '11L solution of potassium hydroxide or sodium hydroxide.

This 4 [ will be explained below.

Arca is a galvanic battery type oxygen meter! Using J'% dissolution, if f,:, correct answer +113 is 02-t21:12 (J+4'→4
0[■-・・・(1)fifightT'lJ 2Pb+
4011-+2PbQ 1,0002 +121J + 4 a-
・-+21 Naru Sakio Kali Cru. i) Filtration with the negative reaction product 1. ” IJ U is electrolyzed in tl (W solution, and the surface of the object will be updated to the original, but the electrolyte is PI). 1, negative (
Between 1Egin and negative 1'l!l!, when t=+shi increases, the acid #
The relationship between the beak 1 and the electric current will collapse, and the life of the oxygen 1 agricultural meter will come to an end.

Using an alkaline electrolyte, the conventional 1 ion group is short and r is a convex O with a negative product. It is as small as f2/t/01 mol/lf@+14- and cannot be bent from one point.

- When a relatively large amount of carbon dioxide gas is contained in the detected gas, insoluble lead carbonate (1' b O
(J 8) or basic lead carbonate (1'b20tJa (
If the negative overvoltage IF or negative positive overcurrent IF becomes too large, it becomes impossible to measure the oxygen-enriched IW.

For conventional disease diagnosers using such alkaline electrolytes,
Therefore, the present invention is directed to the acidic I-dissolution ffN of acetic acid into the =E form.
By using te and C, it is intended to provide the oxygen concentration t1 of the 41' Lubanian electrician 1t12 type, which is life-threatening and affected by carbon dioxide scum.

The conditions required for the electrolyte for such a concentrated tail meter are that the solubility of lead oxide, which is a reaction product, is high, that it is acidic, and that hydrogen generation from IE excitation is inhibited. .

As an electrolyte that satisfies these conditions/'1, Hover 1
The first idea was to discover a mixture of acetic acid, alkali gold 14 or an organic acid salt of annea, and a lead compound, yW.

The alkali metals referred to in 5 are potassium, strium, and lithium, and the organic acids are formic acid, acetic acid, propionic acid, acetic acid, oxalic acid, and malonic acid.

Malenic acid, succinic acid, glutaric acid, citric acid.

Curtaminoic acid, A! The alkali metal or ammonia salts thereof, such as taric acid, benzoic acid, and salicylic acid, are common acids in water, and the lead compounds are lead salts or lead oxides of the above-mentioned organic acids.

The organic salt is limited to one type, but it must be less than 4L, and it may be mixed and used in the stool.

Below, I will explain the details of this 弗台水M++.

Galvanic? lj curved oxygen concentration meter for cape style hood? Use kin to f-coarse, ichi 11! In 11, li 2 + 40 + 4 e → 2 H
2U...(2Pb+ for 81Mffii)
2112 (J→21'l+tj+41-1."-)-4
e −・−・(411) The reaction is slow, and if you are careful, the same lI! oxidizer (PbU) as in the case of alkaline electrolysis is generated.

The level of understanding of lead oxide in an acetic acid aqueous solution is 21 mol/l, which is 21 times that of an alkaline electrolyte at 14 years old. In other words, the lξren 1-fired meter that uses acetic acid as the electrolyte has a Rtii) that is 21 times that of the conventional one.

Hydrogen from F41 in the next day! 16th grade tζtsui-C If you think about it, the hydrogen generation level of the city is given by the missing formula (5).

En--0,2412-to 0.05916 (log, 6τ1-p'l (Vvs 8U, I bow)...+51
Here, 1 bar... 25'c Mitsukuwa Mitsuo average +% potential PL-+2...4 division pi-1... 28 right angles t
'+15135, pH-1 is beef,,z
The more IU: 1, the higher the rank of the Sakuko Gyuhira shield becomes Hi 1, and only then +ll two angles from the water system) b birth. Like a drunken bather, ρ8 is 11x6'
If r is Lll ilE, 'rf = hypoxic area 1
At tJ', the power of IE becomes very strong, so hydrogen is easily generated.

On the other hand, if P8 becomes large A, the water iQ bioequilibrium level of the saliva will be less than 4f, and hydrogen will be less likely to be generated.

Therefore, by adding a weak acid and a strong 111 salt, that is, the alkali metal salt or ammonium salt of the above-mentioned organic acid, to acetic acid (P'''2~3), the pH becomes +81JJi.
I'm getting nervous. Here, the Phl of the solution is larger than 7.
f (If the transition to alkaline σ<g occurs, carbonic acid if
It is important to keep the pH below 7F, preferably within the range of 4 to 65, as the pH will be affected by the temperature. However, if you keep the pH of the bath solution within the above 16) range, there is still a risk of hydrogen generation.

- 10,000, lead's armor ``The position is expressed as the following formula: 11El
p6" = -0,867+ 0.0296 "g
(Ph-11v"S")-'61 and E"'71
111 sho... Lead flat electricity at 25°C ()
□LL +11) 4+〕...411 [Lead ion attachment IJI mouth ¥1 in the peep-understanding is large (Jdo, the city rank of Kumi-Setsu, 19! A' t Jl , it can be seen that from the mountain ni 11 of the base tIIJI, the member is 4[, that is, the flat ρ11j I'i' of the line, iq is 7J (prime;
6th grade equilibrium army 4d Marimo direct! , (until the above-mentioned confusion Fa
tt'; By adding ions along Kk, the first.tt'; If this happens, hydrogen will no longer be generated. ] is lead oxide or printing machine nν
It is sufficient to add it in the form of a width of tL, but the amount added should be 18, which is the minimum amount that can generate hydrogen once. If the amount is too high, the dissolution rate of lead oxide, which is a reaction product, will decrease and the lifespan will be shortened.

Thus obtained is the total IQ4! /l
+, for example, the combination of 25 mol/g acetic acid, 4 eL/l potassium brobionate, and 0.1 mol/sodium diluted with τ Bi water 1 P sum of each maki is 62. Aqueous system generated equilibrium potential1. t-0,61V (VS
K:lG>, H)'1lSj ''+9iV is 1060v (vs 5CE) To1!ru.

In this case, the lead equilibrium '11' is more circular than the hydrogen generation equilibrium potential, so no atom is generated from iE l+o. The solution is acid V1. Therefore, the solution is acetic acid, which has a high bath decomposition of PI), so it has a long lifespan.

As mentioned above, the Calvany according to the present invention "Niike style l'1Ill
! The IZ-embodiment will now be described in detail with reference to FIG. 1.

FIG. 1 shows a cross-sectional structure of a carbani tube-type oxygen flow tjl according to an embodiment of the present invention, with a size of about 1 lb.
(]) is i'E 1ilt+lln? 45 a
platinum plate of ys, (2) is negative j Tsukuda') ra, (
31It 7fi solution fl 62.5 mol/e l
! lt, l”a t4 mol/l potassium propionate and 0
I combination water with 1 mol/e lead oxide (B III, (4
1 is a diaphragm made of ethylene tetrafluoride-ethylene copolymer with a thickness of 20μ, and (5) is a diaphragm (4) with i'+iJ.
J jlX conversion = J Shik7i111) (j% 0
) Ho Iu Ku'6) I Ko IL! Il'rl -t
ru r, = 0-rin' ノ, (7) is lE film
(1) and t'l llt (there is an error between 2+ and t'l llt
It is anti-ts.

Detector 1 Oxygen in the gas passes through the diaphragm (4) 11. With compassion,
When it reaches the surface of iE III1, the above-mentioned (
8) A reaction occurs in the formula I), which corresponds to the amount of oxygen that passes through.

Therefore, T(f, field 1llll'ζ, r+? elementary 0) 1'a at the 1ilIl end of resistor (7)
ilroα(, if pfit is oxygen 71,!a degree'L"J
ll 7+ to rebel.

In order to confirm the effect of the mixed electrolysis according to the present invention, L, small t, r, = one month type oxygen 1u゛, a total of 4 semi-[4ij L, conventional 4 mol/ e Potassium hydroxide water M 2 CC is used as an electrolyte (Al,
(A mixed aqueous solution of Bl, un4(='obviously 2.5 mol/l potassium propionate and () 1 mol/l oxidation solution 2 CC with electric fQ), ( Cut 2jjI
(Al and (0) were grown in the air, and (01 was deposited in a mixed H gas of 21% acid, 10% carbon dioxide, 169% nitrogen). I tested it and got the results as shown in 1.21-1 11.r:
. From Figure 2, we can see that the conventional potassium hydroxide water is 7j
Oxygen concentration 81 as a solution has a lifespan of 6 months (A) even in air. When f'L contains 10% carbon dioxide gas, the oxygen concentration (old C+, tD+) is less than 2 months. It can be seen that it has a long life because it is easily affected by heating of carbon dioxide gas.

As described above in detail, the present invention is a galvanic electric/jlJ type oxygen concentration g-1 which has a long life and is not affected by carbon dioxide gas.
It provides the ultimate value! It's a big deal.

In addition, in ii and I preparation, it may be used after being gelled. Hongan Komei's oxygen opening meter is also suitable for measuring Mγr acid cables.
You can do it for 4.

[Brief explanation of drawings]

ii Figure 1 shows a 4J Rubani 711 according to an embodiment of the present invention.
Figure 2 shows a schematic diagram of the cross-section of the oxygen concentration of the jll1 formula, and Figure 2 shows the parasitic test results of the conventional product and the product of the present invention. A comparison is shown. 1 ・ ・ ・ Positive jQ , 2 −
-- Negative rJ, l, 3 -=
7 [IQ'l iil. 4...l'Mll(il, 5...
0-Linogu, 6...Porter. 7...Resistance, A, j3...Conventional product. (], D...Product of the present invention.

Claims (1)

[Claims] Oxygen is contained in a liquid containing 10,000 pieces of active leaves, tuna metal or mold, a coloring made of lead, an electrolytic solution, and an oxygen-permeable diaphragm. In the filter galvanic T1yflu type oxygen #llt meter, the electrolytes used include acetic acid and lead compounds, as well as formic acid, acetic acid, propionic acid, butyric acid, maleic acid, curtamic acid, etc. Waterproofing or mixing with ammonium salts
Galvanic cell type oxygen side + W (.