Separation and Determination of Chosen λ⁵-Silanates by an Isotachophoresis Technique

Abstract

This work is a continuation of an investigation concerning separation and determination of a mixture of newly obtained pentacoordinated silanates: 1-(N-perhydro-azepiniomethyl)[spirobi(1-sila-2,5-dioxacyclopentane-3-on)]ate,1-(N-perhydroazepinio-methyl)[spirobi(1-sila-2,5-dioxa-4-methylcyclopentane-3-on)]ate, 1-(N-perhydro-azepinio-methyl)[spirobi(1-sila-2,5-dioxa-4,4-dimethylcyclopentane-3-on)]ate. Because of low mobility of analyzed ions elaboration of a new termination electrolyte was necessary. As a main component of this electrolyte, a newly synthesized compound – 4,4′-bis{1-(N-perhydro-azepiniomethyl)[spirobi(1-sila-2,5-dioxacyclopentane-3-on)]ate} was used. Separation of the analyzed mixture can be carried out in a time under 12 minutes.

Keywords:

• Hypercoordinated silicon compounds
• Isotachophoresis
• Separation

ACKNOWLEDGMENT

We would like to thank Mrs. Joanna Nasiłowska for help during the performing of some analyses.

Manuscript 6387

Notes

¹n = 7, the samples were analyzed twice.

²the sample was enriched with 1.5 mL of a solution containing 1 mg · mL⁻¹ of examined ion, n = 7.

³correlation coefficient above 0.98.

⁴calculated from the limit of identification and coefficients of the calibration curve.