
Appendix C Matrices
C-10 PerSeptive Biosystems
C
2-(4-hydroxy-
phenylazo)-benzoic
acid (HABA)
(see mass
spectrum on
page C-4)
MW 242.07 Da
Applications:
•Proteins
• Lipopoly-
saccharides
• Polar and
nonpolar
synthetic
polymers
Color of crystals/
solution:
Orange
• ~1.3 mg/ml in
50:50 water/
acetonitrile or in
40:40:20 water/
acetonitrile/
methanol
• 10 mg/ml in
ethanol or
methanol
• 243.077
• 265.059
3-hydroxypicolinic
acid (3-HPA)
(see mass
spectrum on
page C-4)
MW 139.03 Da
Applications:
Oligonucleotides
Color of crystals/
solution:
Light brown
Make 9:1 dilution of
matrix:diammonium
citrate
Matrix—50 mg/ml in
50:50 water/
acetonitrile
Diammonium
citrate—50 mg/ml in
water
• 96.045
• 140.035
• 279.062
• 235.072
• 234.064
• 233.056
• 191.082
• 189.066
Matrix Applications/Color
Matrix Solution
Concentration
Characteristic
Matrix Ions
(monoisotopic)
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