Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual page 119

Mobile phase absorbance measured against air or water (Continued)
Absorbance at specified wavelength (nm)
200
EDTA, 0.11
disodium,
1 mM
HEPES, 10 2.45
mM,
pH 7.6
MES, 10 2.42
mM,
pH 6.0
Potassium 0.03
phosphate,
monobasic
(KH PO ),
2 4
10 mM
Potassium 0.53
phosphate,
dibasic,
(K HPO ),
2 4
10 mM
Sodium 1.85
acetate,
10 mM
Sodium 2.00
chloride,
1 M
Sodium 2.48
citrate,
10 mM
Sodium 1.00
formate,
10 mM
205 210 215
0.07 0.06 0.04
2.50 2.37 2.08
2.38 1.89 0.90
<0.01 — —
0.16 0.05 0.01
0.96 0.52 0.30
1.67 0.40 0.10
2.84 2.31 2.02
0.73 0.53 0.33
220 230 240
0.03 0.03 0.02
1.50 0.29 0.03
0.45 0.06 <0.01 —
— — —
<0.01 — —
0.15 0.03 <0.01 —
<0.01 — —
1.49 0.54 0.12
0.20 0.03 <0.01 —
Mobile phase absorbance
250 260 280
0.02 0.02 0.02
<0.01 — —
— —
— — —
— — —
— —
— — —
0.03 0.02 0.01
— —
107