A bottle of solution without any information, maybe is inorganic substance, also maybe is organic matter, how do
you know there's what matters in chemical solution?
For instance, there's a bottle of solution you forget to tag, this solution is colourless, no smell, no special viscous,
no reaction with glass vessel, shake the bottle also no foam like suds. Chemistry analysis always cost long time,
and more important thing is that we need to use less as far as possible of the test solution, because the test solution
is limited. So after simple observation to get some basic information, how can we detect the matter of unknown
solution quickly and economic?
methods to detect the matters of unknown chemical solution:
1. Measure PH.
means acid, blue means alkali, if white the it's oxidizing agent.
2. Test electric conductivity and reduction potential.
know how many electrolyte in test solution, generally, it will tell you if there has inorganic solute. Reduction potential
will help you to analysis if there contains oxide. These two test are simple and quickly.
3. Use UV-Visble and fluorescence spectra.
aromatic mixture and coordination compound will be absorpted in particular section. Besides, if good luck
fluorescence spectra could help you find out this compound directly. Even though these two kinds test method could
give you many information, we also suggest do these two test firstly, as they are lowcost and nondestructive testing.
absorption curve, then you will know solution concentration, if there has volatile matter and salt which will decompose
under heating condition. This step will cost you some more time, you could use SEM-EDX to measure element
component of solid which is produced by decomposition.
This test is expensive and also need more time, but can detect most of the elements of the periodic table, after
detecting element component, you need to prepare standard sample then do quantitative determination.
6. GC-MS / HPLC / CE (capillary electrophoresis).
the test condition was determined by composition of the test solution. No matter GC or LC, choose right column and
correct velocity is very important. If you don't know what solution you need to analysis, it's difficult to choose test
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