The invention concerns an NMR apparatus ( 1 ) comprising an NMR spectrometer ( 2 ) for sequential investigation of several samples in sample containers ( 6 ) of substantially identical geometrical design, at a measuring position ( 10 ) in the NMR spectrometer ( 2 ) comprising a supply line ( 8 ) for pneumatic supply of the sample containers ( 6 ) from a magazine ( 3 ) to the measuring position ( 10 ). The apparatus is characterized in that the magazine ( 3 ) is disposed within a temperature-controlled cabinet, in particular, a cold chamber ( 4 ) and the supply line ( 8 ) can be heated. This substantially increases the throughput of samples of the NMR apparatus ( 1 ) with simple technical means.
1. An NMR apparatus for sequential investigation of a plurality of samples at a measuring position, each sample being disposed in an individual sample container of substantially identical geometrical design, the apparatus comprising:
an NMR spectrometer containing the measuring position;
a temperature controlled cabinet disposed at a substantial separation from said NMR spectrometer, said cabinet defining a cold chamber to cool the samples during storage thereof;
a magazine for holding a plurality of sample containers, said magazine disposed within said cabinet;
a supply line for pneumatic supply of the sample containers from said magazine to the measuring position in said NMR spectrometer; and
means for heating said supply line.
2. The NMR apparatus of claim 1 , wherein said heating means is operated with electricity and/or with hot air.
3. The NMR apparatus of claim 1 , wherein said magazine contains at least one sample carrier for receiving a plurality of sample containers.
4. The NMR apparatus of claim 3 , wherein said sample carrier has a well plate format.
5. The NMR apparatus of claim 1 , wherein a parking position is provided in said supply line for intermediate storage and temperature-control of one or more sample container.
6. The NMR apparatus of claim 5 , wherein said parking position is separately heatable.
7. The NMR apparatus of claim 5 , wherein said parking position is disposed in a strong magnetic field.
8. The NMR apparatus of claim 7 , wherein said strong magnetic field is a stray magnetic field of the NMR apparatus
9. The NMR apparatus of claim 1 , further comprising bar codes disposed on each sample container and a bar code reader disposed in said magazine and/or in said NMR spectrometer close to the measuring position.
10. The NMR apparatus of claim 9 , wherein said bar codes are 2-dimensional bar codes.
11. The NMR apparatus of claim 9 , wherein each bar code reader is disposed in an NMR spectrometer probe head.
12. The NMR apparatus of claim 9 , wherein each bar code is disposed at a bottom of said sample container.
13. The NMR apparatus of claim 1 , wherein said sample containers are glass tubes which meet NMR specifications.
14. The NMR apparatus of claim 1 , wherein said sample containers are plastic tubes.
15. The NMR apparatus of claim 1 , wherein said sample containers comprise closing lids which are designed to prevent formation of air columns above the sample after closure.
16. The NMR apparatus of claim 1 , further comprising a return line for pneumatic return of said sample containers into said magazine.
17. The NMR apparatus of claim 16 , wherein said return line is separate and is not temperature-controlled.
18. The NMR apparatus of claim 1 , wherein said magazine comprises a programmable selection device for said sample containers.