Table II.
Comparison of substance P m/z-values measured via QqQ EMS EID and FT ICR EID.
| measured m/z-values |
||||
|---|---|---|---|---|
| Fragment Type | via FT ICR EID (S/N)1 | via QqQ EMS EID | Δm/z (ICR – EMS) |
|
| a1+ | 129.1133 | (373) | (2) | |
| b1+ | 157.1082 | (172) | (2) | |
| a2+ | 226.1661 | (64) | 226.2 | −0.1 |
| c42+ | 248.6713 | (25) | (3) | |
| b2+ | 254.1611 | (700) | 253.8 | 0.4 |
| c2+ | 271.1877 | (83) | 271.1 | 0.1 |
| c52+ | 312.7006 | (35) | (3) | |
| a3+ | 354.2614 | (16) | 354.0 | 0.3 |
| c62+ | 376.7300 | (5) | (3) | |
| b3+ | 382.2563 | (51) | 381.8 | 0.4 |
| [M+2H]3+•– CH2=CHSCH3 –CH2=C(CH3)2 | 406.2205 | (79) | 406.2 | 0.0 |
| [M+2H]3+•– CH2=CHSCH3 – NH3 | 419.2320 | (284) | 419.1 | 0.1 |
| [M+2H]3+•–CH2=CHSCH3 | 424.9080 | (805) | 424.8 | 0.1 |
| a72+ | 427.7539 | (65) | 427.9 | −0.2 |
| b72+ | 441.7513 | (20) | (3) | |
| [M+2H]3+•– NH3 | 443.9054 | (150) | 443.6 | 0.3 |
| [M+2H]3+• | 449.5811 | (237) | 449.7 | −0.1 |
| a4+ | 451.3140 | (11) | (3) | |
| y4+ | 466.2496 | (7) | (3) | |
| b4+ | 479.3099 | (9) | (3) | |
| c4+ | 496.3358 | (52) | 496.2 | 0.2 |
| a82+ | 501.2880 | (55) | 501.6 | −0.3 |
| b82+ | 515.2853 | (39) | 515.0 | 0.3 |
| b92+ | 543.7963 | (49) | 543.5 | 0.3 |
| a5+ | 579.3721 | (6) | 579.2 | 0.2 |
| a102+ | 586.3394 | (9) | 586.6 | −0.2 |
| b102+ | 600.3374 | (122) | 600.4 | −0.1 |
| b5+ | 607.3676 | (28) | 607.3 | 0.1 |
| x102+ | 609.8148 | (37) | 609.5 | 0.3 |
| y5+ | 613.3174 | (5) | (3) | |
| c5+ | 624.3944 | (95) | 624.4 | 0.0 |
| [M+2H]2+ | 674.3715 | (11876) | 674.5 | −0.2 |
| a6+ | 707.4282 | (6) | 707.3 | 0.1 |
| b6+ | 735.4276 | (17) | 735.3 | 0.2 |
| c6+ | 752.4538 | (44) | 752.5 | −0.1 |
| a7+ | 854.5015 | (13) | 854.6 | −0.1 |
| b7+ | 882.4966 | (11) | 882.9 | −0.4 |
| c7+ | 899.5238 | (49) | 899.4 | 0.1 |
| y8+ | 966.4880 | (41) | 966.5 | 0.0 |
| c8+ | 1046.5914 | (21) | 1046.3 | 0.3 |
| z9+• | 1078.5631 | (33) | 1078.9 | −0.3 |
| y9+ | 1094.5852 | (42) | (3) | |
| c9+ | 1103.6124 | (17) | 1103.6 | 0.0 |
| y10+ | 1191.6342 | (6) | 1191.2 | 0.4 |
| c10+ | 1216.7008 | (25) | 1217.0 | −0.3 |
| [M+2H]+• | 1348.7453 | (15) | 1348.5 | 0.2 |