Page 388 - Tandem Techniques
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ionization source interfaced to a tri-axial probe held at 4.3 kV was used for these experiments. A
diagram of their apparatus is shown in Figure 9.31 together with the details of the tri-axial probe.
Figure 9.31
The LC/ES-MS Tandem Apparatus and
details of the Tri -axial Probe (ref. 27)
The tri-axial probe comprised of two concentric stainless steel capillaries and an inner uncoated fused
silica capillary 70 cm long, 75 µm I.D. and 375 µm O.D., that terminated approximately 0.5 mm
beyond the end of the inner stainless steel capillary. The make up flow rate of 70% propan-2-ol and
30% water containing 10 mmol of ammonium acetate and 22
