Ag Calibration Curve on ICP-MS 7900

Hello,

With a R value close to 0.1, I would double check your CoA and make sure that Ag is present in the standard. If it is present, Ag forms more insoluble salts than any other metal - I would recommend trying a new, second standard. Agilent makes an excellent multi element standard that includes 10mg/L of Ag- PN 8500-6940. Hope this helps and have a great day

Hello,

With a R value close to 0.1, I would double check your CoA and make sure that Ag is present in the standard. If it is present, Ag forms more insoluble salts than any other metal - I would recommend trying a new, second standard. Agilent makes an excellent multi element standard that includes 10mg/L of Ag- PN 8500-6940. Hope this helps and have a great day

Hello, 

Thank you for your answer. Yes I the standards has Ag (100ppm). 

Be on the lookout for trace levels of HCl during preparation. This could be causing the formation of AgCl. I would recommend a new standard just to be sure there aren't issues with the stock solution. Hope this helps and have a great day

So are you suggesting for me to use HCl to prepare the calibration standards? 

No, make sure there is no HCl used. 

Really appreciate for taking your time and answering my questions. I just check the standards one of them has Hcl in its matrix. 

Thank you so much! I will try not to use that standard and do testing again! 

You're welcome, have a great day