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Example of main emission line (or band) from sulfur, phosphorus, sodium and potassium between 350 and 800 nm.
Flame spectroscopy presents many advantages:
The measure is instantaneous: each time toxic molecules are sampled in the flame, it reacts immediately.
All elements can be simultaneously detected because they emit different colors.
The response time is very fast
The “return-to-zero” time is very fast
There is no memory effect. Even if you detect a high concentration, the sensitivity for all detectable elements will recover a few seconds after.
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