icp-oes

Hi can any one give me some guide lines how to decrese the sodium contamination in icp-oes optima 5300dv.
we rum a lot of high sodium stuff and i recently found the blank also has some sodium in it.
how do i get rid of sodium.
Thnks,
Bhanu

Clean your flasks and everything with 10 % HNO3 and deionized water  at least 10 times.

 THANKS

 my renium peak at wavelengh 227.525 doesnt get at clear neat peak.it looks like their is collution of two peaks how can i confirm it.

 Hi All, can anyone help me in finding an appropriate instrument for nickle analysis in nickle carbonate powders which has 40-48% nickle in it. and also nickle sulfate solutions which has nickle 9.9-10.01 %.
can I use ICP-OES for analysi using bracketing method instead of electroplating nickle and how would the accurate be compared to plating numbers.

THANKS