Queuing System

Instruments

Five spectrometers operating at 400 and 500 MHz are equipped with sample changers:

HCI D309:

• Bruker Avance III HD 400 MHz with BBFO smart probe (OXF400)

HCI D313:

• Bruker Neo 400 MHz with BBFO smart probe (AVN400)
  
• Bruker Neo 500 MHz with BBFO smart probe (AVN500)

HCI D326:

• 2x Bruker Avance III 400 MHz equipped with BBFO smart probe (ASC400 & ULT400)
  

The sample changers are directly fed by the users. All samples are measured on a ‘first come, first served’ basis.

Booking rules

Detailed booking rules can be found here.

Important for AVN400 and ASC400 (Read this!)

On these machines, two different queues are active depending on the time of day. During daytime they only accept short experiments of max. five minutes and the quotum per user is limited. Experiments that take longer (e.g. ¹³C spectra) can only be submitted for measurement during the night. The intended use is that you submit some of your experiments for the daytime queue and some for the nighttime queue. The experiments in the daytime queue are usually measured within one hour and the results from the experiments submitted to the nighttime queue should be ready the next morning. This ensures rapid feedback during the day and still allows full characterization of your sample without having to move it to another machine

There are two important points that you have to keep in mind:

This only works if you put your experiments in the right order!: Daytime experiments first, then the nighttime experiments. If you do it the other way around, the first experiment will be started in the evening and the daytime experiments will only be ready the next morning. This is true even if the daytime queue is empty!

If the nighttime queue is longer than 12 hours the last experiment will only be measured more than one day later! You should not wait that long (solvent evaporation) but rather submit the long experiments on one of the other machines. All other machines have only one queue and they also allow longer experiments during daytime. As a result the queues are usually longer than on AVN400 or ASC400 but they are never longer than 24 hours.

Experiments

Available by default:

• 1D: ¹H, ¹³C with ¹H BB-decoupling, ¹⁹F (with/without ¹H BB-decoupling), ³¹P (with/without ¹H BB-decoupling), ¹¹B
• 2D: ¹H-¹H-COSY, multiplicity edited ¹³C-HSQC, ¹³C-HMBC.

Instructions

Instructions for setting up samples are located next to the individual machines or can be found protected page here (access via nethz password only). 

Icon Web and Waiting Times

Registered users may follow the status of the sample changer queues via their web browser (see box "Services" at the right side of this page). The current waiting times on all machines can be found on our Status Page.