Method for measuring content of residual metal elements in OLED (Organic Light Emitting Diode) material
A technology of metal element content and metal element, applied in the field of detection, can solve the problems of poor detection results, inaccurate reproducibility, etc., and achieve the effect of high accuracy, small background blank, and low detection limit
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[0046] Step 1: Preparation of standard solution:
[0047] Draw 1ml from Ge,In,Re,Rh,Sc,Y multi-element standard solution 3 into a 50ml PFA volumetric flask, use 10% nitric acid to dilute to get 2μg / ml Ge,In,Re,Rh,Sc,Y Element standard solution mother solution, as internal standard solution;
[0048] Draw 0.5ml from multi-element standard solution 1 and multi-element standard solution 2 into 50ml PFA volumetric flasks respectively, and use 10% nitric acid to obtain a mixed multi-element standard solution of 10μg / ml. Pipette 0.5ml, 2.5ml, 5ml, 25ml into four different 50ml PFA volumetric flasks, and dilute with 10% nitric acid to obtain 0.1μg / ml, 0.5μg / ml, 1μg / ml, 5μg / ml mixed multi-element Standard solution mother solution, draw 0.5ml from the mixed multi-element standard solution mother solution of 1μg / ml and 5μg / ml respectively to two different 50ml PFA volumetric flasks, dilute to the volume with 10% nitric acid to obtain 0.01μg / ml, 0.05μg / ml ml of mixed multi-element stan...
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