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In the atomic absorption spectrophotometer, the currently commonly used light source is a tungsten lamp.

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The radiation sources used in atomic absorption spectrometry (AAS) are usually element-specific.

The coordination numbers of [Cu(NH3)4]2+and[Cu(en)2]2+ are both 4.

If the stability of the complex formed by the indicator and M is slightly less than that of the corresponding EDTA complex, the end point will be delayed, which belongs to the fossilization of the indicator.

The increase of acidity leads to a decrease in αY(H) and an increase in the actual stability of EDTA complexes.

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