New Possibility for REE Determination in Oil

Table 4

Measured REE concentration in Tengizskaya oil by ICP-MS after CCC preconcentration from different sample volumes of Tengizskaya oil.

Element	Concentration, μg/kg
	𝑉𝑀=𝟓𝟐mL	𝑉𝑀=𝟏𝟎𝟒mL	𝑉𝑀=𝟔𝟐𝟒mL
Y	𝟎.𝟎𝟏𝟗±0.004	𝟎.𝟎𝟐𝟏±0.004	𝟎.𝟎𝟐𝟑±0.004
La	𝟎.𝟏𝟑𝟑±0.02	𝟎.𝟎𝟕𝟓±0.02	𝟎.𝟎𝟗𝟏±0.02
Ce	𝟎.𝟎𝟔±0.01	𝟎.𝟎𝟔±0.01	𝟎.𝟎𝟓±0.01
Pr	𝟎.𝟎𝟎𝟔±0.001	𝟎.𝟎𝟎𝟔±0.001	𝟎.𝟎𝟎𝟕±0.001
Nd	<0.001	<0.001	<0.001
Sm	𝟎.𝟎𝟎𝟔±0.001	𝟎.𝟎𝟎𝟒±0.001	𝟎.𝟎𝟎𝟓±0.001
Eu	𝟎.𝟎𝟏𝟖±0.004	𝟎.𝟎𝟐𝟏±0.004	𝟎.𝟎𝟏𝟕±0.004
Gd	𝟎.𝟎𝟏𝟏±0.003	𝟎.𝟎𝟏𝟒±0.003	𝟎.𝟎𝟏𝟑±0.003
Tb	𝟎.𝟎𝟎𝟐𝟎±4𝐸−4	𝟎.𝟎𝟎𝟐𝟎±4𝐸−4	𝟎.𝟎𝟎𝟐𝟎±4𝐸−4
Dy	𝟎.𝟎𝟎𝟑𝟎±6𝐸−4	𝟎.𝟎𝟎𝟑𝟎±6𝐸−4	𝟎.𝟎𝟎𝟑𝟎±4𝐸−4
Ho	𝟎.𝟎𝟎𝟏𝟎±2𝐸−4	𝟎.𝟎𝟎𝟏𝟎±2𝐸−4	𝟎.𝟎𝟎𝟏𝟎±4𝐸−4
Er	𝟎.𝟎𝟎𝟐𝟎±4𝐸−4	𝟎.𝟎𝟎𝟐𝟎±4𝐸−4	𝟎.𝟎𝟎𝟑𝟎±4𝐸−4
Yb	𝟎.𝟎𝟎𝟓±0.001	𝟎.𝟎𝟎𝟓±0.001	𝟎.𝟎𝟎𝟓±0.001
Lu	<0.0005	<0.0005	<0.0005