Revision history - NMR Wiki Q&A Forum

1

initial version

posted Nov 01 '13 at 14:35

The IUPAC-IUB recommended chemical shift referencing ratios for indirect chemical shift referencing are available at : http://bmrb.wisc.edu/ref_info/cshift.shtml For anydrous liquid ammonia it is 15N-1H (DSS) 0.101329118 BTW, the method of conversion of folded frequencies into corrected frequencies depends upon the method used for quadrature detection in the indirect dimension: TPPI, States or States-TPPI.

2

No.1 Revision

posted Nov 01 '13 at 14:51

sekhar Talluri
621

The IUPAC-IUB recommended chemical shift referencing ratios for indirect chemical shift referencing are available at : http://bmrb.wisc.edu/ref_info/cshift.shtml

For anydrous liquid ammonia it is 15N-1H (DSS) 0.101329118

BTW, the method of conversion of folded frequencies into corrected frequencies depends upon the method used for quadrature detection in the indirect dimension: TPPI, States or States-TPPI.

If quadrature detection is accomplished according to the method of States et al., then the zero frequency is at the center and the ends of the processed spectrum are at +/- SW/2.

If TPPI is used for the indirect dimension then, the zero frequency is at one end of the spectrum (if the processed spectrum is properly oriented, it will be at the bottom).

3

No.2 Revision

posted Nov 01 '13 at 17:44

sekhar Talluri
621

The IUPAC-IUB recommended chemical shift referencing ratios for indirect chemical shift referencing are available at : http://bmrb.wisc.edu/ref_info/cshift.shtml

For anydrous liquid ammonia it is 15N-1H (DSS) 0.101329118

BTW, the method of conversion of folded frequencies into corrected frequencies depends upon the method used for quadrature detection in the indirect dimension: TPPI, States or States-TPPI.

If quadrature detection is accomplished according to the method of States et al., then the ~~zero~~ carrier frequency is at the center and the ends of the processed spectrum are at carrier frequency +/- SW/2.

If TPPI is used for the indirect dimension then, the ~~zero~~ carrier frequency is at one end of the spectrum (if the processed spectrum is properly oriented, it will be at the bottom).

4

No.3 Revision

posted Nov 01 '13 at 17:46

sekhar Talluri
621

The IUPAC-IUB recommended chemical shift referencing ratios for indirect chemical shift referencing are available at : http://bmrb.wisc.edu/ref_info/cshift.shtml

For anydrous liquid ammonia it is 15N-1H (DSS) 0.101329118

BTW, the method of conversion of folded frequencies into corrected frequencies depends upon the method used for quadrature detection in the indirect dimension: TPPI, States or States-TPPI.

If quadrature detection is ~~accomplished~~ used according to the method of States et al., then the carrier frequency is at the center and the ends of the processed spectrum are at carrier frequency +/- ~~SW/2.~~SW/2 in the indirect dimension.

If TPPI is used for the indirect dimension then, the carrier frequency is at one end of the spectrum (if the processed spectrum is ~~properly oriented,~~ oriented according to common conventions, it will be at the ~~bottom).~~bottom) in the indirect dimension.