How do I build a home-made apparatus for identifying what minerals are present in water?

While there are many readily available kits in the commercial market for testing the type of minerals present in water, 


* is there a way we can build one at home?


I am ready to spend some bucks on raw materials, if I can get the knowledge of how to build such apparatus




*This probably not what you are looking for, but the cheapest and least time-consuming analysis is the one done by others for free.*


Over here (Germany), local water suppliers are required by law ([Trinkwasserverordnung - TrinkwV](http://www.gesetze-im-internet.de/trinkwv_2001/BJNR095910001.html)) to monitor the quality of potable water. This includes a large number of microbiological and chemical parameters. The details are given in the annexes 1-5 of the TrinkwV.


The results are published and are are available online at no cost. 


Examples (mostly in German) are:


* [RheinEnergie](https://www.rheinenergie.com/de/privatkundenportal/energie_wasser/wasser_2/qualitaet__haerte/qualitaet__haerte_1.php) (Cologne area)
* [RWW - Rheinisch-Westfälische Wasserwerksgesellschaft](http://www.rww.de/trinkwasser/wasserqualitaet/trinkwasseranalysen/) (one of the largest suppliers in Germany)


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