COEI-2-NICKEL Determination of nickel by atomic absorption spectrometry

1. Principle

The nickel is directly determined by atomic absorption spectrometry without flame (electro-thermal atomisation).

COEI-2-MINERA Mineralisation methods of samples before determination by atomic absorption spectrometry

1. Mineralisation by dry process

Method applicable for determining the following elements: calcium, magnesium, sodium, iron, copper, zinc.

1.1.    Obtaining cinders

COEI-2-METAUX Search for heavy metals

1. Principle of the method

Heavy metals react with the thiol function to form sulphurs. The coloration that results is compared to a standard.

COEI-2-FER Determination of iron by atomic absorption spectrometry

1. Principle

The iron is determined by atomic absorption spectrophotometry by flame.

2. Apparatus

2.1.    Instrumental parameters: (given as an example)

COEI-2-CUIVRE Determination of copper by atomic absorption spectrometry

1. Principle

The copper is determined by atomic absorption spectrometry by flame by using the method of measured additions.

2. Apparatus

Instrumental parameters: (given as an example)

COEI-2-CHROME Determination of chrome by atomic absorption spectrometry

1. Principle

The chrome is determined by atomic absorption spectrophotometer without flame.

COEI-2-CHLORU Search for chlorides

In a 160  16 mm test tube, place the volume prescribed of the solution obtained by the means indicated in each monography; add 5 ml of diluted nitric acid (R); complete to 20 ml and add 0.5 ml of silver nitrate solution at 5% (R).

COEI-2-CENDRE Sulphuric cinders

The sulphuric cinders result from the calcination after being in contact with air after being attacked by sulphuric acid.