GB/T 4702.6-2016Chromium metal—Determination of iron, aluminium, silicon and copper content—Inductively coupled plasma atomic emission spectrometry method (English PDF)

1 Scope

This part of GB/T 4702 specifies the determination of iron, aluminum, silicon and copper by inductively coupled plasma atomic emission spectrometry.

This part is applicable to the determination of iron, aluminum, silicon and copper in metallic chromium. The determination range of each element is shown in Table 1.

Table 1 Measurement range

Analysis element Determination range (mass fraction) /%

Fe

Al

Si

Cu

0.002 to 1.00

0.004 to 1.00

0.003 to 0.60

0.001 to 0.050

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article

Pieces. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 4010 Ferroalloy chemical analysis of the sample to take and preparation

GB/T 6682 Analytical laboratory water specifications and test methods

GB/T 12806 laboratory glass instrument single standard line capacity bottle

GB/T 12807 Laboratory glass instruments - Index pipettes

GB/T 12808 Laboratory glass instruments Single line suction pipette

3 principle

The samples were decomposed by hydrochloric acid and inductively coupled with an inductively coupled plasma emission spectrometer to measure the emission intensity of the elements in the solution.

The mass fraction of the analytical element is calculated from the calibration curve made with the standard solution.

4 reagent

Unless otherwise stated, only the confirmed analytical reagent is used in the analysis, and the water used is distilled or deionized or substantially pure water,

Should comply with GB/T 6682 level water requirements.