1) First, do qualitative scanning with XRF, and make a preliminary screening (the price of Tianrui is relatively favorable, about 3, yuan, for the existing XRF instruments that can detect Cl and Br);

2) for heavy metal detection in ROHS and EN71-PART3, ICP detection can be selected, and the ICP of thermoelectric in several models I use is relatively stable; The price is about 6,;

3) For the detection of PBBs, PBDEs in ROHS, GC-MS can be selected. Agilent's is good. Agilent 789-5975 costs about 6, yuan.

4) For Cr(vi) in ROHS, UV-VIS spectrophotometer can be selected, and we use Labtech, which is about 5, yuan;

5) Ion chromatograph (IC) is needed for halogen detection. Diane's is good, and the price of ICS-9 is about 18,.

ICP, GC-MS, UV-VIS, and IC all need to pre-process the samples before they can be tested on the computer, that is, the tested samples are finally converted into liquid analysis.