Zusammenfassung der Ressource
Testing water purity and blood
- BLOOD
- Modern blood tests are very sensitive
- Can test detect and accurately
measure small amounts of
substances in the blood
- Analytical chemists test blood
samples to help doctors identify
why their patients are ill
- WATER
- Drinking water is not
pure because it contains
dissolved substances
- Some substances are deliberately added to tap water
- Chlorine is added to
kill harmful chemicals
- Aluminium sulfate is added to
remove small solid particles
- It is important to make sure the
amount of all dissolved substances
found in drinking water is safe