COEI-2-PLOMB Determination of lead by atomic absorption spectrometry

1. Principle

After mineralisation of the sample in an acid medium, the lead is determined by spectrometry without flame (electro-thermal atomisation).

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.

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.

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.

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).