142
I. Viera and M. Roca
Table 6.4 (continued)
Chlorophyll
Product ions
Structural assignments
[M+H-58] +
[M+H-CH 2 CO 2 ] +
[M+H-76] +
[M+H-CH 3 CH 2 HCO 2 ] +
Pyropheophorbide a
[M+H-46] +
[M+H-HCO 2 H] +
Table 6.5 Commercial suppliers of chlorophyll standards
Chlorophyll standard
Commercial supplier
Bacteriochlorophyll a
Frontier Scientific
Sigma
Parchem
Chlorophyll a
Sigma
DHI
Wako
Parchem
Chlorophyll b
Sigma
DHI
Chlorophyll c 1
DHI
Chlorophyll c 2
DHI
Chlorophyll c 2 -MGDC
DHI
Chlorophyll c 3
DHI
Chlorophyll d
Parchem
Chlorophyllide a
DHI
Divinyl chlorophyll a
DHI
MgDVP
DHI
Pheophorbide a
DHI
Sigma
Frontier Scientific
Pheophytin a
DHI
Wako
Pyropheophytin a
Frontier Scientific
Pyropheophorbide a
Frontier Scientific
microalgal cultures recommended for new algal classes and prochlorophytes. Isolation employs an extraction followed by a separation. Chlorophyll standards can be
segregated from other pigments, including epimers and allomerized counterparts,
either by thin-layer chromatography (TLC) or by semipreparative HPLC.