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(a) Analyte (transition) DP (b) CE CXP EP 5MeTHF (m/z 460 [right arrow] m/z 313) 40 27 22 10 [sup.13][C.sub.5]-5MeTHF 56 29 20 10 (m/z 465 [right arrow] m/z313) FA (m/z 442 [right arrow] m/z 295) 40 30 15 10 [sup.13][C.sub.5]-FA 45 30 20 10 (m/z 447 [right arrow] m/z 295) 5FoTHF (m/z 474 [right arrow] m/z 327) 41 27 22 10 [sup.13][C.sub.5]-5FoTHF 60 29 22 10 (m/z479 [right arrow] m/z327) THF (m/z 446 [right arrow] m/z 299) 81 27 20 10 (a) The general instrument settings used for LC/MS/MS detection and quantification of all four analytes in MRM were as follows: resolution, Q1 and Q3; unit dwell time, 200 ms; ion spray voltage, 5200 V; source temperature, 350 [degrees]C; curtain gas, 20 psi; gas 1, 20 psi; gas 2, 40 psi; collisionally activated dissociation gas, 4.0 psi.
"We're really convinced that this is an impact crater," says Horz, who adds that other rocks at the site -- among them the now-famous Yogi -- may have been "collisionally processed."
Collisionally activated decomposition MS/MS was performed through the closed-design [Q.sub.2] collision cell operating with nitrogen as collision gas.
The similarity of this knot to the Magellanic Clouds and other dwarf galaxies suggests that perhaps they too are collisionally born objects.
A study of the collisionally induced dissociation fragmentation mechanism for different dicarboxylic acids revealed that MS/MS fragment ions at m/z 175 and 119 (loss of 56 and 112 Da) in n-butyl-MMA are unique compared with the other evaluated dicarboxylic acids derivatives.