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QMS 403/5 SKIMMER - Coupling system

 

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Lead chloride (7.92 mg) in an argon flow of 150 ml/min shows evaporation starting in the melting range (487°C). The molecule ion (PbCl₂ m/z = 278) and fragment ions caused by dissociation and ionization (PbCl m/z = 243, Pb m/z = 208, Cl m/z = 37, CL m/z = 35) are clearly detected far below the boiling temperature of the starting material.

Pitch carbon powder (55.2 mg) decomposes in nitrogen flow (50 ml/min) into aromatic compounds of high molecular weight, mainly up to 600°C. Only selection is shown by MID curves for pyrenes (m/z = 202), Triphenylenes (m/z = 228), Benzo(a)pyrenes (m/z = 252), Benzo(ghi)perylenes (m/z = 276) and Dibenzopyrenes (m/z = 302).

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