DE852309C - Indicator paper for the detection of excess sulfite - Google Patents
Indicator paper for the detection of excess sulfiteInfo
- Publication number
- DE852309C DE852309C DEF7341A DEF0007341A DE852309C DE 852309 C DE852309 C DE 852309C DE F7341 A DEF7341 A DE F7341A DE F0007341 A DEF0007341 A DE F0007341A DE 852309 C DE852309 C DE 852309C
- Authority
- DE
- Germany
- Prior art keywords
- detection
- sulfite
- indicator paper
- sulphite
- excess
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 title claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 title description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 12
- 239000000276 potassium ferrocyanide Substances 0.000 claims description 4
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 0.000 claims description 4
- BQMKAHQKDSZAIQ-UHFFFAOYSA-N tetrasodium;iron(3+);nitroxyl anion;pentacyanide Chemical compound [Na+].[Na+].[Na+].[Na+].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].O=[N-] BQMKAHQKDSZAIQ-UHFFFAOYSA-N 0.000 claims description 4
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 4
- 229960001763 zinc sulfate Drugs 0.000 claims description 4
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 4
- 229910052740 iodine Inorganic materials 0.000 description 4
- 239000011630 iodine Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Biophysics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Description
Indikator-Papier zum Nachweis von Sulfitübersdiüssen In der Wasseraufbereitung werden in zunehmendem Maße Sulfite angewandt, um korrosiven Sauerstoff abzubinden, gemäß der Gleichung: 2 SO3 + O2 = 2 SO4.Indicator paper for the detection of sulphite excesses In water treatment Sulphites are increasingly used to bind corrosive oxygen, according to the equation: 2 SO3 + O2 = 2 SO4.
Um allen Sauerstoff zu beseitigen, ist ein Überschuß von Sulfit erforderlich, welcher laufend bestimmt werden muß, um Korrosionen fernzuhalten. To eliminate all oxygen, an excess of sulfite is required, which must be determined on an ongoing basis in order to keep away corrosion.
Die laufenden Sulfitbestimmungen erfordern einen verhältnismäßig großen Aufwand an Zeit und sind auch schwierig durchzuführen. The ongoing sulphite determinations require a proportionate take a lot of time and are also difficult to perform.
In der Regel wird der Sulfitüberschuß umständlich dadurch gemessen, daß unter Luftabschluß eine Wasserprobe mit einer Jodlösung bekannter Konzentration im Überschuß versetzt wird. Ein Teil des Jods in dieser Lösung wird, wenn Sulfit vorhanden ist, verzehrt, worauf der restliche Jodgehalt der Probe mittels Natriumthiosulfatlösung unter Zusatz von Stärke titrimetrisch ermittelt wird. Aus der verbrauchten Jodlösung wird dann der Sulfitgehalt im Wasser errechnet. As a rule, the sulphite excess is laboriously measured by that in the absence of air a water sample with an iodine solution of known concentration is added in excess. Some of the iodine in this solution becomes when sulfite is present, consumed, whereupon the remaining iodine content of the sample by means of sodium thiosulphate solution is determined titrimetrically with the addition of starch. From the used iodine solution the sulphite content in the water is then calculated.
Eine andere Bestimmungsmethode arbeitet unter Verwendung einer Lösung von Natriumnitroprussiat, welches in Gegenwart von Zinksulfat in sulfithaltigen Wasserproben eine Rotfärbung erzeugt. Bei weiterem Zusatz von Kaliumferrozyanid bildet sich ein roter Niederschlag, welcher weiß bleibt, wenn kein Sulfit vorhanden ist. Another method of determination works using a solution of sodium nitroprussiate, which in the presence of zinc sulfate in sulfite Water samples produced a red color. With further addition of potassium ferrocyanide A red precipitate forms, which remains white if no sulfite is present is.
Auch diese Methode erfordert eine Reihe von Reagenzien und Geräten, so daß sie trotz der Vereinfachung noch verhältnismäßig umständlich ist. Again, this method requires a number of reagents and equipment, so that it is still relatively cumbersome despite the simplification.
Die vorliegende Erfindung befaßt sich mit einer Verbesserung der Suffitbestimmung im allgemeinen und der letzteren im besonderen, damit der Betriebs- mann in schneller und einfacher Weise nachprüfen kann, ob sein Wasser genügend Sulfit enthält. The present invention is concerned with improving the Suffit determination in general and the latter in particular, so that the operational man can check in a quick and easy way whether his water has enough sulfite contains.
Es zeigte sich bei Versuchen, daß der mittels Natriumnitroprussiat, Zinksulfat und Kaliumferrozyanid sich bildende weiße Niederschlag, wie er in sulfitfreien Wasserproben entsteht, nachträglich eine Rotfärbung annimmt, wenn er mit Sulfitionen in Berührung kommt. Zu diesem Zweck wurde saugfähiges weißes Papier durch eine Natriumnitroprussiat- und Zinksulfatlösung gezogen und anschließend in den Poren dieses Papieres mittels Kaliumferrozyanidlösung der erwähnte weiße Niederschlag erzeugt. It was found in tests that the sodium nitroprussiate, Zinc sulfate and potassium ferrocyanide formed white precipitate, as found in sulfite-free Water samples emerge, subsequently turns red when mixed with sulfite ions comes into contact. For this purpose, absorbent white paper was replaced by a sodium nitroprussiate and zinc sulfate solution and then drawn into the pores of this paper means Potassium ferrocyanide solution produces the aforementioned white precipitate.
Nach der Trocknung und selbst nach monatelanger Lagerung zeigte sich dieser beständig und reaktionsfähig, so daß ein Streifen dieses Papieres mit einer Sulfitlösung von 20 mg/l SO3-Gehalt, wie er bei Dampfkesselwässern üblicherweise eingêhalten wird, befeuchtet noch eine Rosafärbung annahm, die bei höheren Sulfitgehalten entsprechend. stärker wurde. After drying and even after months of storage, it was found this resistant and reactive, so that a strip of this paper with a Sulphite solution with 20 mg / l SO3 content, as is usually the case with steam boiler water is adhered to, when it was moistened, it assumed a pink color, which was the case with higher sulphite contents corresponding. got stronger.
An Hand einer Farbskala kann der Sulfitgehalt demnach mit genügender Genauigkeit im praktischen Betrieb ermittelt werden, sollte der einfache Nachweis nicht genügen. Der Betriebsmann ist also in der Lage, mittels dieses neuen Indikator--Papieres in kürzester Frist und ohne Umstände festzustellen, ob der Sulfitgehalt in seinem Wasser genügend hoch ist. Based on a color scale, the sulphite content can be determined with sufficient Accuracy in practical operation should be determined by simple evidence not enough. The manager is thus able to use this new indicator paper In the shortest possible time and without further ado to determine whether the sulphite content is in his Water is high enough.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF7341A DE852309C (en) | 1951-10-16 | 1951-10-16 | Indicator paper for the detection of excess sulfite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF7341A DE852309C (en) | 1951-10-16 | 1951-10-16 | Indicator paper for the detection of excess sulfite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE852309C true DE852309C (en) | 1952-10-13 |
Family
ID=7085394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEF7341A Expired DE852309C (en) | 1951-10-16 | 1951-10-16 | Indicator paper for the detection of excess sulfite |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE852309C (en) |
-
1951
- 1951-10-16 DE DEF7341A patent/DE852309C/en not_active Expired
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