CHE SIGNIFICA FLAME TEST IN INGLESE
Prova della fiamma
Un test di fiamma è una procedura analitica utilizzata nella chimica per rilevare la presenza di alcuni elementi, in prevalenza ioni metallici, basati sul caratteristico spettro di emissione di ciascun elemento. Il colore delle fiamme in generale dipende anche dalla temperatura; Vedere il colore della fiamma. Il test prevede l'introduzione di un campione dell'elemento o del composto ad una fiamma calda e non luminosa e osservando il colore della fiamma che ne risulta. L'idea della prova è che gli atomi di campionamento evaporano e dal momento che sono caldi, emettono luce quando sono in fiamme. Il campione di massa emette anche la luce, ma la sua luce non è buona per l'analisi. Il campione di massa emette luce principalmente a causa del moto degli atomi, quindi il suo spettro è ampio, costituito da una vasta gamma di colori. Atomi separati di campioni presenti in fiamma possono emettere solo a causa di transizioni elettroniche tra diversi livelli di energia atomica. Queste transizioni emettono luce di frequenze molto specifiche, caratteristiche dell'elemento chimico stesso. Pertanto, la fiamma ottiene il colore, determinato principalmente dalle proprietà dell'elemento chimico della sostanza che viene messo in fiamma.
definizione di flame test nel dizionario inglese
La definizione di flame test nel dizionario è un test per rilevare la presenza di determinati metalli nei composti mediante la colorazione che danno a una fiamma. Il sodio, per esempio, diventa una fiamma gialla.
PAROLE IN INGLESE ASSOCIATE CON «FLAME TEST»
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10 LIBRI IN INGLESE ASSOCIATI CON «FLAME TEST»
Scopri l'uso di
flame test nella seguente selezione bibliografica. Libri associati con
flame test e piccoli estratti per contestualizzare il loro uso nella letteratura.
1
Stimulus Distiller: A Blue
Flame (
Test)
A desert adventure with asexual fungi produces the hallucinogenic, ethyl alcohol.
2
Laboratory Manual for Principles of General Chemistry
The flame test for sodium ion is reliable but also requires some technique. Clean
the flame test wire by dipping it in 6 M HCl (Caution!) and heating it in the hottest
part of a Bunsen flame until the flame is colorless (five steps in Figure 38.2).
3
Flame Retardant Polymerics: Electrical and Electronic ...
UL Cable Tray Flame Test UL began testing cables for use in cable trays in
accordance with the 1975 National Electrical Code using the IEEE 383 test
method. Gradually UL began to refine the test method and this test became
known as the ...
4
Elements of Polymer Fire Safety and Guide to the Designer: ...
In the Small-Flame Test, a specimen measuring 2% X 10 inches is mounted
vertically and the lower end is exposed to a 1 .5 inch long vertical flame from a
burner for 12 seconds, in a test chamber measuring 12 X 12 X 30 inches. In the
Large ...
National Research Council (U.S.). Committee of Fire Safety Aspects of Polymeric Materials,
1979
5
Together With Chemistry Lab Manual-Xii
Identify correct colour in flame test. Crimson red or pinkish red or liliac red in case
of Sr+2, whereas brick red or dull red colour in case of Ca+2. CHEMICAL
EQUATIONS INVOLVED FOR THE REACTIONS OF GROUP V CATIONS (Ba2+,
Sr2+, ...
6
The Electronics Handbook
To obtain a Type OFN listing, the cable must pass a standardized flame test, such
as the UL 1581 flame test. The UL 1581 test specifies the maximum burn length
the cable can experience to pass the test. Type OFN cables can be used in ...
In the Spread of Flame Test, a gas flame is permitted to bathe the lower 4 ft of the
surface of the covering continuously — 10 min for Classes A and B, and 4 min for
Class C. To be eligible for classification, flame spread is not to exceed 6 ft for ...
8
Public Cable 1. 0: Building Specification Section 13410; ...
CL2P: An NRTL listed NEC Article 725 Class 2 (CL2) and UL 13 (CL2) compliant
cable having passed the flame test required for plenum use (NFPA 262 / UL 910)
- 150V maximum voltage. CL2R: An NRTL listed NEC Article 725 Class 2 ...
ALUMINIUM SALTS (i) Dry Test tube Heating : No significartt change takes place,
(ii) Flame test : No coloured flame is formed, (iii) Borax Bead test : No coloured
bead is formed. (iv) Cobalt nitrate test : When an aluminium salt is first strongly ...
10
Bibliography on
flame spectroscopy: analytical applications ...
Stahl, W. Quantitative study of the boric acid-alcohol flame test. Acta Univ. Lat-
viensis Kim. Fakultat. Serija 1, No. 13-17, 369-400 (1930). C.A. 25, 1455 (1931).
1726. Stahl, W. Quantitative studies on the boric acid-alcohol flame test. Z. Anal.
Radu Mavrodineanu, Institute for Basic Standards (U.S.). Office of Standard Reference Data,
1967
10 NOTIZIE DOVE SI INCLUDE IL TERMINE «FLAME TEST»
Vedi di che si parla nei media nazionali e internazionali e come viene utilizzato il termine ino
flame test nel contesto delle seguenti notizie.
Chemistry Teacher Heads for Island Life
Her students loved the flame test where different chemicals were burned to produce a variety of colors. She considers herself a rather clumsy ... «ithaca.com, giu 15»
Protective clothing
The most commonly used test method for measuring flame-resistance is the Vertical Flame Test (ASTM D6413 Standard Test Method for Flame ... «Safety+Health magazine, giu 15»
Tech Trends
The Exane jacketed cables are mud- and oil-resistant and pass the IEEE 1202 Vertical Cable Tray Flame Test. These cables have enhanced ... «E&P, giu 15»
Chemistry experiment goes awry, injures students
A flame test being demonstrated by an experienced teacher during an AP ... Several elements in a type of a common flame test called the ... «Tallahassee.com, mag 15»
RSCC introduces high performance Exane cables for drilling …
The Exane jacketed cables pass the IEEE 1202 Vertical Cable Tray Flame Test to ensure fire safety. An alternative version, Exane ZH Cat 6, ... «WorldOil, mag 15»
The Game vs. Young Thug: Gangstas, strippers, guns, and threats …
smishpixie profile. smishpixie Flame test "magic" @ Morley (Nr Leeds) https://t.co/t9b65A7Srv 37 mins ago • reply • retweet • favorite · msb1338 ... «Twitchy, mag 15»
It's All Systems Go for Falcon 9: SpaceX will Try again for a Record …
In the wake of finishing its static flame test on Thursday, the Falcon 9 rocket was taken off to the platform Sunday night in arrangement for ... «Empire State Tribune, apr 15»
Setting up a framework
According to the Rose Brand site, “a vertical flame test is used to determine if a drapery fabric resists burning and is self-extinguishing. If a fabric is not sufficiently ... «Rental Management Magazine, mar 15»
Manuscript on Chemical Bonds: Lesson 1 Review on Atomic …
Also, when atoms are excited and go back to their original state (ground state) , they can emit characteristic colors such as in flame test ... «Science 2.0, mar 15»
Pupils hunt down criminal mastermind at CSI Brannel forensic day
The children also conducted a flame test to help find out more about a mysterious powder left by the culprit at the scene of the crime. Finally ... «Cornish Guardian, mar 15»