Ag on 7900

Hello, 

Several application notes are published with only 0.5% HCl added to 1% HNO3 : 

Ag in soils / 0.5% HCl + 1% HNO3 : https://www.agilent.com/cs/library/applications/application-soil-7850-icp-ms-5994-2933en-agilent.pdf

Ag in drinking water / 0.5%HCl + 1% HNO3 : https://www.agilent.com/cs/library/applications/5991-4938EN.pdf

Ag in cannabis / 0.5% HCl + 1% HNO3 : https://www.agilent.com/cs/library/applications/5991-8482EN_cannabis_icp-ms_application.pdf

In those application notes, maximum standards of Ag are 100 ppb.

Not 100% sure it wil work the same for 300 ppb, but shoud be OK.

Best regards, 

Guillaume

I've used 0.5% up to low ppm levels for Ag and there was enough excess Cl to stabilize it. If you noticed poor recovery with 0.5% that would be your indicator to increase to 1% but I doubt it will be needed. 

Hi Guillaume

Thank you for your feedback and references.  

Regards.

Hi Cheltajc

Thank you for your answer. Always good to hear from people with experience.

Rergards.

If Ag concentration increases, there is the possibility that the HCl can cause AgCl to precipitate (cloudy and white). Risk of nebulizer blockage and/or lower Ag recovery values.