CS273292B1 - Soil acidimeter - Google Patents
Soil acidimeter Download PDFInfo
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- CS273292B1 CS273292B1 CS393688A CS393688A CS273292B1 CS 273292 B1 CS273292 B1 CS 273292B1 CS 393688 A CS393688 A CS 393688A CS 393688 A CS393688 A CS 393688A CS 273292 B1 CS273292 B1 CS 273292B1
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- electrode
- soil
- area
- acidimeter
- area electrode
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
Description
Vynález se týká půdního acidimetru, složeného z mikroampérmetru, velkoploché elektrody, měřící elektrody a izolační vložky.The invention relates to a soil acidimeter consisting of a micro-ammeter, a large-area electrode, a measuring electrode and an insulating insert.
V současné době jsou používány pro rychlé měření půdní acidity jednoduché pH-metry, vycházející z velkoploché hliníkové nebo z hliníkové slitiny zhotovené elektrody a z měřicí zinkové elektrody, popřípadě ze zinkové slitiny. Obě elektrody tvoří galvanický článek produkující po zanoření elektrod do půdy proud, který se měří pomocí míkroampe'rmetru, jehož stupnice je cejchována v jednotkách pH.At present, simple pH meters are used for rapid measurement of soil acidity, starting from a large-area aluminum or aluminum alloy electrode and a measuring zinc electrode or zinc alloy. Both electrodes form a galvanic cell producing a current after immersion of the electrodes into the soil, which is measured using a microcampeter whose scale is calibrated in pH units.
Nevýhodou doposud známého uspořádání elektrod je,^že údaj na stupnici acidimetru je značně závislý na hloubce zanoření elektrod, i když je vlhkost půdy ve všech hloubkách od povrchu konstantní, což je možno prokázat experimentálně.A disadvantage of the prior art electrode arrangement is that the reading on the acidimeter scale is highly dependent on the depth of electrode immersion, although the soil moisture at all depths is constant from the surface, which can be demonstrated experimentally.
Výše uvedený nedostatek odstraňuje jiůdní acidimetr, složený z mikroampérmetru, velkoploché elektrody, měřicí elektrody a izolační vložky, podle vynálezu. Jeho podstata spočívá v tom, že velkoplochá elektroda je opatřena vymezující izolační trubičkou, upevněnou k velkoploché elektrodě tmelem.The aforementioned drawback is overcome by a south-east acidimeter composed of a micro-ammeter, a large-area electrode, a measuring electrode and an insulating insert according to the invention. Its essence is that the large surface electrode is provided with a delimiting insulating tube attached to the large surface electrode with sealant.
Vyšší účinek vynálezu spočívá v zabezpečení konstantní plochy velkoploché elektrody a tím v dosažení vyšší reprodukovatelnosti a správnosti naměřené acidity.The higher effect of the invention is to ensure a constant surface area of the large-area electrode and thereby to achieve a higher reproducibility and correctness of the measured acidity.
Půdní acidimetr podle vynálezu je blíže vysvětlen na výkresu, na kterém je znázorněn půdní acidimetr podle vynálezu.The soil acidimeter according to the invention is explained in more detail in the drawing in which the soil acidimeter according to the invention is shown.
IAND
Půdní acidimetr se skládá z mikroampérmetru JL, který je jedním koncem spojen s velkoplochou elektrodou 2 a druhým koncem spojen s měřicí elektrodou J5· Mezi velkoplochou elektrodou 2 a měřicí elektrodou 3_ je vložena izolační vložka £. Velkoplochá elektroda 2 je opatřena vymezující izolační trubičkou _5> vymezující plochu velkoploché elektrody 2.The soil acidimeter consists of a micro-ammeter L1, which is connected to the large electrode 2 at one end and to the measuring electrode 5 at the other end. An insulating insert 6 is inserted between the large electrode 2 and the measuring electrode 3. The large surface electrode 2 is provided with a delimiting insulating tube 5 delimiting the surface of the large surface electrode 2.
Velkoplochá elektroda 2 byla zhotovena ze slitiny hliníku a vizmutu, měřicí elektroda 2 ze slitiny zinku a vizmutu. Izolační vložka 4. elektrod byla realizována z epoxidové pryskyřice. Vymezující izolační trubička 5. byla zhotovena z neměkčeného polyvinylchloridu, přičemž do ní byla zatmelena pomocí epoxidové pryskyřice velkoplochá elektroda 2.The large surface electrode 2 was made of an aluminum-bismuth alloy, the measuring electrode 2 was made of a zinc-bismuth alloy. The insulating insert of the 4th electrodes was made of epoxy resin. The delimiting insulating tube 5 was made of unplasticized polyvinyl chloride, and a large-area electrode 2 was sealed therein with epoxy resin.
Sestavený elektrodový systém byl testován pomocí vzorků půdy, jejíž pH bylo upravováno pomocí kyseliny sírové nebo hydroxidu vápenatého. Kyselost takto připravených vzorků půdy byla kontrolována běžnou skleněnou·elektrodou a pH-metrem. Proud generovaný elektrodovým systémem byl měřen přesným mlkroampérmetrem.The assembled electrode system was tested using soil samples whose pH was adjusted with sulfuric acid or calcium hydroxide. The acidity of the soil samples thus prepared was checked with a conventional glass electrode and pH meter. The current generated by the electrode system was measured with an accurate ml-amperemeter.
Vyhodnocením proudových odezev bylo zjištěna, že odchylky zjišíováných pH v měřených oblastech pH = 4 až 6 a 8 až 10 od správných hodnot ve srovnání s elektrodovým systémem bez vymezené plochy velkoploché elektrody byly podstatně nižší a byly menší než - 0,2 jednotek pH.By evaluating the current responses, it was found that the deviations of the measured pH values in the measured pH = 4-6 and 8-10 regions from the correct values compared to an electrode system without a large area electrode area were significantly lower and were less than - 0.2 pH units.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS393688A CS273292B1 (en) | 1988-06-07 | 1988-06-07 | Soil acidimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS393688A CS273292B1 (en) | 1988-06-07 | 1988-06-07 | Soil acidimeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS393688A1 CS393688A1 (en) | 1990-07-12 |
| CS273292B1 true CS273292B1 (en) | 1991-03-12 |
Family
ID=5380874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS393688A CS273292B1 (en) | 1988-06-07 | 1988-06-07 | Soil acidimeter |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS273292B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100488646C (en) * | 2004-11-23 | 2009-05-20 | 中国农业科学院土壤肥料研究所 | Self-washing agitator of acidimeter |
-
1988
- 1988-06-07 CS CS393688A patent/CS273292B1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100488646C (en) * | 2004-11-23 | 2009-05-20 | 中国农业科学院土壤肥料研究所 | Self-washing agitator of acidimeter |
Also Published As
| Publication number | Publication date |
|---|---|
| CS393688A1 (en) | 1990-07-12 |
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