SPIFAN Nutrients ERP Book_9-29-15

MTE-03 Addendum FOR ERP USE ONLY DO NOT DISTRIBUTE

COMMITTEE DRAFT

ISO/CD 15151 | IDF 229

Table B.1 — Selected emission wavelengths and second check wavelengths and interferences for determination by ICP-AES.

Element

Wavelength of emission (nm)

Sort of “line”

Interfer ence

Ca

210.324 211.276 317.933 422.673 324.754 327.395 238.204 259.940 239.563 766.491 769.897 279.800 285.213 257.610 293.306 259.372 588.995 589.592 213.618 214.914 202.548 213.857 360.074 410.237

Ion Ion Ion Atom Atom Atom

Y

Cu

Ti, Fe

Fe

Ion Ion Ion

K

Atom Atom Ion Atom

Mg

Fe

Mn

Ion Ion Ion

Fe, Mo, Cr, Al, Fe

Na

Atom Atom Atom Atom Ion Atom Ion Atom

Ar

P

Cu, Fe, Mo, Zn Cu, Al, Mg

Zn

P

Y (internal standard)

*Other lines of appropriate sensitivity, free of interferences or corrected for interferences in specific matrixes may be as just as acceptable.

B.3

Quantification

B.3.1 General

As spectroscopic techniques are not able to measure concentrations directly, but by means of a conversion of the emission signal into concentration, calibration is inevitable. Calibration can be performed by means of a calibration curve.

B.3.2 Calibration curve

A calibration curve is constructed by adding increasing amounts of the substance to be studied to a solution of a supporting matrix. The most difficult condition to meet is making the solutions used for

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