The parameters which govern the selection of standard for REE and trace element analysis using the ICPMS technique for different rocks, the cause of Eu and Ce anomaly, generation of plots defining the normalization pattern are to be studied.
It is good to use a reference standard that has compatible composition and type of sample to be analyzed. e.g., if you wish to analyze river sediment use a shale (Cody Shale-USGS SCO1), for marine sediment MAG-1, for granites G2 and so on...; Almost all type of reference standards available. For REE normalization to average crustal composition PAAS or NASC values could be used.
Here is another one that I published recently: Chauvel, C., S. Bureau, and C. Poggi (2011), Comprehensive Chemical and Isotopic Analyses of Basalt and Sediment Reference Materials, Geostandards and Geoanalytical Research, 35(1), 125-143.
Harshita Joshi, as u know Ce negative anomaly in the basalt in oceans give u inference exchage of Ce by Mn by Mn nodules, becz they have same radius and charge, Eu -ive anamaly depicts us fractional crystallization of garnites while as Eu remains in the melts and goes with the plagioclase and does not substitute for K-feldsphars,if u get +ve Eu anomaly u can say fractional crystallization has not taken place in case of Fesic source