What are the methods of analysis in geochemistry?

1. Water analysis (anions and cations): HPLC method

2. Isotopic elements (18O, 2H, 3H, 13C and 14C): Spectro meter of mass

3. Soil analysis: RX, HPLC...

XRf.. XrD.. SEM. Atomic Absortion Etc are all methods to find Geochemical Investigation of minerals

The analysis types I used in my mineral geochemistry studies involved first X-ray difractometry for mineral identification (based on the Bragg`s Law principle) and assessment of structural issues. For eample, in the case of the feldspars, K-feldspars (microcline) and plagioclase terms (albite, oligoclase) were undoubdfully identified and then some order-disorder characteristics and cell parameters were established. Subsequently, for the geochemical study per se, I used the X-ray fluorescence (XRF) analysis on powders and electron microprobe analysis (EMPA) on thin slides - for the major elements and inductively coupled plasma - mass spectrometry (ICP-MS)  for minor and trace elements quantification. Also the EMPA provided information on the intimate feldspar structure, such as zoning and specific distributions at microscopic scale   

In fact it is a big topic and has evolved extensively in recent years.

It is the oldest method of geochemical analysis

* The method of weight analysis Gravimetric Methods:

In which we melt the rock and then deposition of the element to be analyzed in the form of a composite and then separated and weighed, and the disadvantages of this method that they need to be experienced person in addition to it takes a very long time.

In the 1960s, scientists discovered the Rapid Silicat analysis:

 Colourimetry: Analysis by Spectrophotometry.

Analysis of Flame Photometry.

Titration process.

Also of the methods used in geochemical analysis:

Neutron activation.

 Isotope elilution.

3) Plasma Coupled Induced Coupled Plasma.

X-Ray fluorescence.

 Atomic absorption.

All this way depends on the user's device and the sensitivity of the method.