GB/T 4702.15-2016Chromium metal—Determination of lead,tin,bismuth,antimony and asenic content—Inductively coupled plasma mass spectrometric method (English PDF)

1 Scope

This part of GB/T 4702 specifies the determination of lead, tin, bismuth, antimony and arsenic in metallic chromium by inductively coupled plasma mass spectrometry.

This part is applicable to the determination of lead, tin, bismuth, antimony and arsenic in metallic chromium. The determination range of each element is shown in Table 1.

Table 1 Element and measurement range

Analysis element Determination range (mass fraction) /%

Pb

Sn

Bi

Sb

As

0.00010 to 0.0050

0.00010 to 0.0050

0.00010 to 0.0050

0.00010 to 0.0050

0.00010 to 0.0050

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 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 with dilute sulfuric acid, and the solution was atomized and introduced into an inductively coupled plasma mass spectrometer. The mass spectra of the analytical elements in the solution were measured

The mass fraction of the analytical element is calculated from the calibration curve made with the standard solution. Calibrate the blank and calibrate the solution to the subject of the sample to be tested

Element and sample decomposition with the acid matrix matching, indium as the internal standard calibration instrument sensitivity drift and matrix effect.

4 reagent

Unless otherwise stated, only high purity reagents or equivalent purity of less than 0.00005% of each of the elements to be measured are used in the analysis

Reagents.