Nessler's reagent: Difference between revisions
m Protected "Nessler's reagent": Protecting pages from unwanted edits ([edit=sysop] (indefinite) [move=sysop] (indefinite)) |
m Robot: Automated text replacement (-{{SIB}} +, -{{EH}} +, -{{EJ}} +, -{{Editor Help}} +, -{{Editor Join}} +) |
||
| Line 1: | Line 1: | ||
{{SI}} | {{SI}} | ||
==Overview== | ==Overview== | ||
| Line 31: | Line 31: | ||
[[Category:Coordination compounds]] | [[Category:Coordination compounds]] | ||
[[Category:chemical tests]] | [[Category:chemical tests]] | ||
[[de:Neßler-Reaktion]] | [[de:Neßler-Reaktion]] | ||
[[it:Soluzione di Nessler]] | [[it:Soluzione di Nessler]] | ||
Latest revision as of 14:15, 20 August 2012
|
WikiDoc Resources for Nessler's reagent |
|
Articles |
|---|
|
Most recent articles on Nessler's reagent Most cited articles on Nessler's reagent |
|
Media |
|
Powerpoint slides on Nessler's reagent |
|
Evidence Based Medicine |
|
Cochrane Collaboration on Nessler's reagent |
|
Clinical Trials |
|
Ongoing Trials on Nessler's reagent at Clinical Trials.gov Trial results on Nessler's reagent Clinical Trials on Nessler's reagent at Google
|
|
Guidelines / Policies / Govt |
|
US National Guidelines Clearinghouse on Nessler's reagent NICE Guidance on Nessler's reagent
|
|
Books |
|
News |
|
Commentary |
|
Definitions |
|
Patient Resources / Community |
|
Patient resources on Nessler's reagent Discussion groups on Nessler's reagent Patient Handouts on Nessler's reagent Directions to Hospitals Treating Nessler's reagent Risk calculators and risk factors for Nessler's reagent
|
|
Healthcare Provider Resources |
|
Causes & Risk Factors for Nessler's reagent |
|
Continuing Medical Education (CME) |
|
International |
|
|
|
Business |
|
Experimental / Informatics |
Overview
Neßler's reagent is a reagent named after Julius Neßler and is used to detect small amounts of ammonia. It is a 0.09 mol/L solution of potassium tetraiodomercurate(II) (K2[HgI4]) in 2.5 mol/L potassium hydroxide. A yellow coloration indicates the presence of ammonia: at higher concentrations, a brown precipitate may form. The sensitivity as a spot test is about 0.3 μg NH3 in 2 μL.
- NH4+ + 2[HgI4]2− + 4OH− → HgO·Hg(NH2)I + 7I− + 3H2O
Toxicity
It is toxic if swallowed, inhaled or absorbed through the skin. It presents a neurological hazard and may act as a carcinogen and be a reproductive hazard. It is corrosive and causes burns.
Other names
Neßler's solution, mercuric potassium iodide, mercury(II) potassium iodide, Channing's solution, potassium mercuric iodide, potassium tetraiodomercurate(II)
Preparation
Neßler's reagent is generally prepared from potassium iodide and mercury(II) chloride. Hot concentrated solution of mercury(II) chloride is added to concentrated solution of potassium iodide, until the precipitate of mercury(II) iodide stops dissolving. The liquid is filtered, and potassium hydroxide and a further bit of mercury(II) chloride solution are added. The resulting solution is then cooled and diluted to required concentration. [1]
Reference
External links
- IARC Monograph: "Mercury and Mercury Compounds"
- National Pollutant Inventory - Mercury and compounds fact sheet
de:Neßler-Reaktion it:Soluzione di Nessler sl:Nesslerjev reagent Template:WH Template:WS