Cholesterol BAPR
Low concentration samples can be extremely challenging, especially 13C which has only 1% natural abundance. Without a field frequency lock, the problem of magnet drift can be intolerable. Anasazi Instruments has solved this problem in a unique way; Block Averaging with Peak Registration (BAPR). In the BAPR experiment, blocks of data are acquired (with or without shimming between block acquisitions). The data is stored as an array of FID’s. All of the blocks are Fourier transformed and, using a strong resonance as the registration peak, all of the spectra are then aligned. The individual spectra are converted to a single spectrum with significantly enhanced signal-to-noise.
Concentration: 0.2 M + 1% TMS in Bezene-d6
Below is the result of a 2 hour acquisition of 0.2 M Cholesterol using the BAPR program on an EFT-60.
The inset plot indicates the resolution obtainable at the carbon frequency (15.1 MHz).
