8 Questions 23 Answers 0 Followers
Questions related from Tharanga Udagedara
What are the reasons for having negative intensity (in cps) for elements like Al and Na in normal groundwater samples in ICP-AES analysis? The calibrations curves for both elements were...
15 November 2015 9,174 3 View
I have experienced (-) negative values for a particular element in AAS or ICE-AES analysis. 1. What does this really mean and how could it happen? Can we explain it using the calibration curve? 2....
07 September 2015 2,416 30 View
H2O is subtracted from the rest of major element oxides in weathering potential index (Richei, 1943) . What is the reason for that? Is it due to sharp increase of combined water with progressive...
16 July 2015 4,296 4 View
Is it possible to have Fe2O3 in Sillimanite? I observed (under SEI) a sillimanite looking grain (in a metamorphic rock sample) with characteristic cross fractures in my SEM-EDS studies. But...
24 June 2015 7,822 14 View
Could anyone please let me know whether there is any special concern when the Parker index is calculated for weathered rocks? I calcuated it using the given simple equation (2Na2O/0.35 + MgO/0.9 +...
04 December 2014 3,291 10 View
Could anyone please let me know the standard procedure of measuring LOI in a rock sample
06 November 2014 9,711 15 View
XRF Data Analysis I have received XRF data sheet of a rock sample where oxides are in weight percentages. Could I use those data as it is or should I treat those data. For example there are some...
16 September 2014 4,548 12 View
Are there methods to evaluate connectivity of pore spaces in a rock sample? Is there any expression called "Pore connectivity index" to express the pore connectivity? Is it the same as tortuosity?
20 May 2014 4,344 5 View
