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Common Problems for XRF fusion bead Method
Ruishenbao Analytical (Tianjin) Co., Ltd
Key word: XRF fusion bead, problems, RUISHENBAO ,
1)XRF fusion bead Preservation
Most XRF fusion bead are somewhat hygroscopic. The most hygroscopic is prepared by Na2B4O7, covered with a layer of white hydrate. Lithium borate flux is less affected by humidity. In any case, samples to be tested should be kept in the dryer, especially the standard material.
2) XRF fusion bead rupture
XRF fusion bead rupture is related to many factors:
3) XRF fusion bead burst
XRF fusion bead with internal stress sometimes burst usually after operation or prolonged cooling. The stability of the glass bead can be increased by adding a small amount of SiO2 or Li2B4O7 to the flux mixture. The factors that cause internal stress are:
4) Crystallization during cooling
XRF fusion bead crystallization is unfavorable, so it should be avoided in preparation. The factors include:
5) Ejecting of melting mixture from the crucible
6) The apparent insoluble black spots floating on the bead surface
The black spots indicate the presence of graphite, and handle this as follows:
7)Bubbles continuously formed at the bottom of the crucible
This may be caused by the decomposition of SO3 in the melting body into SO2 gas. The following measures could be taken:
8) Bubbles on the bead surface
If bubbles appear, do as follows:
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+86 10-57374441
+86 136 8188 9743
info@ruishenbao.com
Whatsapp:+86 13681889743
Skype:+86 13681889743
Room1006,No.280,ShangZhongXiLu,Xuhui district,ShangHai,200237,P.R.China