DE4113212A1 - Cyanide standard soln. contg. complex cyanide, pref. tetra:cyano-zincate - easily releasing cyanide, which is stable and less toxic than alkali cyanide - Google Patents
Cyanide standard soln. contg. complex cyanide, pref. tetra:cyano-zincate - easily releasing cyanide, which is stable and less toxic than alkali cyanideInfo
- Publication number
- DE4113212A1 DE4113212A1 DE4113212A DE4113212A DE4113212A1 DE 4113212 A1 DE4113212 A1 DE 4113212A1 DE 4113212 A DE4113212 A DE 4113212A DE 4113212 A DE4113212 A DE 4113212A DE 4113212 A1 DE4113212 A1 DE 4113212A1
- Authority
- DE
- Germany
- Prior art keywords
- cyanide
- soln
- stable
- pref
- complex
- 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.)
- Withdrawn
Links
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 231100001231 less toxic Toxicity 0.000 title abstract description 3
- 239000003513 alkali Substances 0.000 title description 3
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 5
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 150000002825 nitriles Chemical class 0.000 claims description 9
- 239000012086 standard solution Substances 0.000 claims description 7
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- -1 alkali metal cyanides Chemical class 0.000 abstract description 3
- 150000001340 alkali metals Chemical class 0.000 abstract description 2
- 238000001461 argentometric titration Methods 0.000 abstract description 2
- 238000007865 diluting Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 abstract 3
- 239000012153 distilled water Substances 0.000 abstract 2
- 239000000243 solution Substances 0.000 description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical group 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- GTLDTDOJJJZVBW-UHFFFAOYSA-N zinc cyanide Chemical class [Zn+2].N#[C-].N#[C-] GTLDTDOJJJZVBW-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/96—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood or serum control standard
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hematology (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Urology & Nephrology (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- Cell Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Die Erfindung betrifft lagerstabile Cyanidstandardlösungen. Wäßrige Lösungen von Cyaniden, insbesondere von Alkalicyani den, sind nicht über längere Zeit stabil. Durch Oxidation, Wechselwirkung mit dem Kohlendioxid der Luft, aber auch durch Lichteinwirkung, verändert sich der Gehalt der Lösungen, abhängig von der Konzentration der Lösung an Cyanidionen, sehr schnell.The invention relates to storage-stable cyanide standard solutions. Aqueous solutions of cyanides, especially alkali cyanide are not stable over a long period of time. Through oxidation, Interaction with the carbon dioxide in the air, but also through Exposure to light, the content of the solutions changes, depending on the concentration of cyanide ions in the solution, very fast.
In der Analytik werden häufig Lösungen mit definiertem Gehalt als Standardlösungen zu Kalibrierzwecken benötigt. Hierzu wird eine Urtitersubstanz genau bekannten Gehaltes eingewogen und in einem bekannten Volumen Wasser gelöst. Im Falle des Cyanids werden hierzu in der Regel die leicht löslichen Alkalicyanide verwendet. Es muß also eine stark giftige Substanz gehandhabt werden, um eine Lösung mit definiertem Gehalt an Cyanid herzustellen. Diese Lösungen sind, je nach der Konzentration an Cyanid, nur über einen relativ kurzen Zeitraum stabil, insbesondere wenn die Cyanidkonzentration im bereich von mg/l liegt.In analytics, solutions with a defined content are often used required as standard solutions for calibration purposes. For this an original titer substance is weighed out with a precisely known content and dissolved in a known volume of water. In the case of For this purpose, cyanides are usually the most easily soluble Alkali cyanides used. So it must be a highly toxic one Substance can be handled to a solution with defined Cyanide content. These solutions are, depending on the concentration of cyanide, only over a relatively short one Period stable, especially when the cyanide concentration in the range of mg / l.
Der Erfindung liegt die Aufgabe zugrunde, eine lagerstabile Cyanidstandardlösung zur Verfügung zu stellen, die auch weniger giftig ist als das bisher zu diesem Zweck verwendete Alkalimetallcyanid. The invention has for its object a storage stable To provide cyanide standard solution that too is less toxic than that previously used for this purpose Alkali metal cyanide.
Überraschenderweise wurde gefunden, daß bestimmte komplexe Cyanide diese Forderungen erfüllen.Surprisingly, it has been found that certain complex Cyanides meet these requirements.
Gegenstand der Erfindung ist eine Cyanidstandardlösung, die durch einen Gehalt an komplexen Cyaniden gekennzeichnet ist.The invention relates to a cyanide standard solution which is characterized by a content of complex cyanides.
Lösungen von Cyanokomplexen mit geringer Komplexstabilität, d. h. freien Cyanidionen, weisen eine hohe Stabilität bezüglich der Cyanidionenkonzentration auf. Vorzugsweise wäßrige Lösungen von komplexen Cyaniden von Zink, Nickel und Cadmium, insbesondere Alkalimetalltetracyanozinkat, zeigen auch nach längerer Lagerung eine ausgezeichnete Stabilität. Dies trifft sowohl für konzentrierte Lösungen (1-20 g/l Cyanid) als auch für verdünnte Lösungen im Bereich von etwa 500 mg/l Cyanid zu.Solutions of cyano complexes with low complex stability, d. H. free cyanide ions, have high stability regarding the cyanide ion concentration. Preferably aqueous solutions of complex cyanides of zinc, nickel and Cadmium, especially alkali metal tetracyanozinkat show excellent stability even after prolonged storage. This applies to both concentrated solutions (1-20 g / l Cyanide) as well as for dilute solutions in the range of about 500 mg / l cyanide too.
Neben Zink, Nickel und Cadmium bilden eine Reihe von Metallen ebenfalls komplexe Cyanide, wie z. B. Silber, Eisen, Quecksil ber, Kupfer, Cobalt usw. Diese sind jedoch teilweise so stabil, daß sich sowohl das Metall als auch das Cyanid dem Nachweis entziehen.In addition to zinc, nickel and cadmium, a number of metals form also complex cyanides, such as. B. silver, iron, mercury About copper, cobalt, etc. However, some of them are stable that both the metal and the cyanide Withdraw proof.
DIN 38 405, Teil 13, unterscheidet zwischen leicht freisetzba rem Cyanid und Gesamtcyanid. Leicht freisetzbar ist alles Cyanid, das bei einem pH-Wert von 4 mit dem beschriebenen Verfahren direkt bestimmt werden kann. Die Bestimmung des Gesamtcyanids erfordert einen Aufschluß durch Kochen mit verdünnter Salzsäure in Gegenwart von Kupfer(I)-Ionen.DIN 38 405, part 13, differentiates between easily releasable Rem cyanide and total cyanide. Everything is easy to release Cyanide, which is at a pH of 4 with that described Procedure can be determined directly. The determination of the Total cyanide requires digestion by cooking with dilute hydrochloric acid in the presence of copper (I) ions.
Für die erfindungsgemäßen Cyanidstandardlösungen muß das Cyanid in leicht freisetzbarer aber lagerstabiler Form vor liegen. Diese Voraussetzung wird von Lösungen der komplexen Cyanide von Nickel, Cadmium und Zink besonders gut erfüllt. Im Hinblick auf die zusätzliche Umweltbelastung durch Nickel und Cadmium wird zur Herstellung dieser Lösungen vorzugsweise das Zinksalz verwendet.For the standard cyanide solutions according to the invention Cyanide in an easily releasable but storage stable form lie. This requirement is met by solutions of complex Nickel, cadmium and zinc cyanides particularly well met. With regard to the additional environmental pollution caused by nickel and cadmium is preferred for the preparation of these solutions uses the zinc salt.
In einem 1-1-Meßkolben werden 1,25 g (19,2 mmol) Kaliumcyanid in ca. 500 ml dest. Wasser gelöst. Anschließend gibt man 1,127 g (9,6 mmol) Zn(CN)2 hinzu und verdünnt mit dest. Wasser bis zur Eichmarke. Das Zn(CN)2 wird unter Rühren gelöst. Eventuell ungelöste Anteile werden über ein Faltenfilter abfiltriert. Der Cyanidgehalt der Lösung wird durch argen tometrische Titration mittels potentiometrischer Indikation im alkalischen Medium bestimmt. Elektrode: Silber-Einstab- Meßkette. 1 ml AgNO3-Lösung 0,1 mol/l = 5,2036 mg CN-. Aus der Stammlösung können durch Verdünnung eines Aliquots Lösungen definierten Gehaltes hergestellt werden.1.25 g (19.2 mmol) of potassium cyanide in approx. 500 ml of dist. Water dissolved. Then add 1.127 g (9.6 mmol) of Zn (CN) 2 and dilute with dist. Water up to the calibration mark. The Zn (CN) 2 is dissolved with stirring. Any undissolved portions are filtered off using a pleated filter. The cyanide content of the solution is determined by argentometric titration using potentiometric indication in an alkaline medium. Electrode: silver single-rod electrode. 1 ml AgNO 3 solution 0.1 mol / l = 5.2036 mg CN-. Defined content can be prepared from the stock solution by diluting an aliquot of solutions.
Claims (3)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4113212A DE4113212A1 (en) | 1991-04-23 | 1991-04-23 | Cyanide standard soln. contg. complex cyanide, pref. tetra:cyano-zincate - easily releasing cyanide, which is stable and less toxic than alkali cyanide |
| ITRM920286A IT1254324B (en) | 1991-04-23 | 1992-04-17 | CYANIDE SAMPLE SOLUTIONS STABLE FOR STORAGE |
| FR9204844A FR2675905A1 (en) | 1991-04-23 | 1992-04-21 | STANDARD CYANIDE SOLUTIONS STABLE ON STORAGE. |
| NL9200732A NL9200732A (en) | 1991-04-23 | 1992-04-22 | STORAGE STABLE CYANIDE STANDARD SOLUTIONS. |
| JP4129347A JPH05193929A (en) | 1991-04-23 | 1992-04-23 | Standard solution of cyanide stable to storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4113212A DE4113212A1 (en) | 1991-04-23 | 1991-04-23 | Cyanide standard soln. contg. complex cyanide, pref. tetra:cyano-zincate - easily releasing cyanide, which is stable and less toxic than alkali cyanide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4113212A1 true DE4113212A1 (en) | 1992-10-29 |
Family
ID=6430170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4113212A Withdrawn DE4113212A1 (en) | 1991-04-23 | 1991-04-23 | Cyanide standard soln. contg. complex cyanide, pref. tetra:cyano-zincate - easily releasing cyanide, which is stable and less toxic than alkali cyanide |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH05193929A (en) |
| DE (1) | DE4113212A1 (en) |
| FR (1) | FR2675905A1 (en) |
| IT (1) | IT1254324B (en) |
| NL (1) | NL9200732A (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE782831A (en) * | 1971-05-05 | 1972-08-16 | Paris Rene A | NEW COMPLEX METALLIC CYANIDES |
| US3850761A (en) * | 1973-03-01 | 1974-11-26 | Orion Research | Cyanide decomplexing |
| US4026790A (en) * | 1975-03-07 | 1977-05-31 | The United States Of America As Represented By The United States Energy Research And Development Administration | Removal of Zn or Cd and cyanide from cyanide electroplating wastes |
| CH621367A5 (en) * | 1977-07-08 | 1981-01-30 | Systemes Traitements Surfaces | Electrolytic bath for plating gold-copper-cadmium alloys and its use in galvanoplasty |
| JPS635239A (en) * | 1986-06-25 | 1988-01-11 | Seiko Instr & Electronics Ltd | Zinc-cadmium composite standard solution for atomic absorptiometric analysis |
-
1991
- 1991-04-23 DE DE4113212A patent/DE4113212A1/en not_active Withdrawn
-
1992
- 1992-04-17 IT ITRM920286A patent/IT1254324B/en active
- 1992-04-21 FR FR9204844A patent/FR2675905A1/en active Granted
- 1992-04-22 NL NL9200732A patent/NL9200732A/en not_active Application Discontinuation
- 1992-04-23 JP JP4129347A patent/JPH05193929A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| ITRM920286A1 (en) | 1993-10-17 |
| IT1254324B (en) | 1995-09-14 |
| JPH05193929A (en) | 1993-08-03 |
| NL9200732A (en) | 1992-11-16 |
| FR2675905B1 (en) | 1997-02-21 |
| FR2675905A1 (en) | 1992-10-30 |
| ITRM920286A0 (en) | 1992-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |