797 VA Computrace by Metrohm AG

"Bought in 2005 I'm very happy of this system for trace analysis in water. Great instrument for ppb analisys in water samples . not fast compared to ICP system but MUCH MUCH MORE economic fopr analysis. Great reproducibility ( more then 15 years interlab check )"

"The versatile instrument for voltammetry. 797 VA Computrace is a modern voltammetric work station connected to the PC via a USB port."

"Our instrument is several years old now and has faced some electrical difficulties, however the service and support from the Metrohm team ensured our instrument was quickly and reliably functional again. The Metrohm Team are always quick to respond, provide helpful advice for troubleshooting and spare parts are always delivered promptly."

"Is easy to use, you have to be sure to prepare the device and electrodes properly to get good results. Is a very sensitive device and the technician has to be careful to get reproducible results."

"For our application, the product is good at it's job. Whilst our current software is not the most up-to-date issue, it is still easy to operate, although understanding the reasons or procedures behind why certain settings have to be "like that" does take a little time to comprehend. Overall, the machine is very good, with any problems mostly to do with the material(s) that we are trying to analyse. Whilst the equipment is rather pricey, it is of excellent quality, with any failures due to age-related wear-and-tear, rather than faults with the apparatus. The documentation provided by Metrohm is easy to follow, and logical in its approach."

"The VA 797 Computrace serves to introduce the analytical chemistry methods of polarography and voltammetry to 4th semester chemistry students. The students analyze a tap water sample for the concentration of zinc, copper, lead and cadmium ions and a juice sample for the concentration of vitamin C. In the summer semester about 50 students work with the instrument over 5-6 weeks, in the winter semester another ~50 students use the instrument over 5-6 weeks. The students are given a handout with instructions how to use the instrument. The instrument has been in service now for about 8 years. So far, we've had no major damage done to the instrument and no major failure. The mercury drop electrode is, of course, regularly serviced by a staff technician. We obtain very reliable data from the instrument as verified by the large number of experiments done on easily comparable samples. The VA 797 Computrace is easy to operate and robust as demonstrated with the lab course. We had no problems giving the instrument into the hands of students. Once or twice in the 8 years of service we had to contact Metrohm service which responded fast and we were able to solve the problem without a visit. Outside of the time of the lab course the instrument is available for metal analysis in aqueous solutions."

"When replacing the outdated equipment for thiourea analysis, the best option was the VA 797. This instrument was accurate and flexible enough for our processes. We use it on a daily basis for accurate results in the ppm range. The only issues we have is plugging of the capillary tube. But, this has to do with our solutions we run on the instrument. We have had a few service calls and Metrohm took care of the problem in a timely manor. Parts and supplies are easily available."

"Very easy to use. a day to day research instrument for a chemical laboratory with the HMDE electrode. Many specialized applications are possible with a variety of electrodes offered."

"This is a great product and is easy to use. It is easy to clean and the finish on the instrument resists corrosion. All parts are easy to exchange in the unit. The software is very user friendly for all technicians. Metrohm customer support has been great and has knowledgeable people to troubleshoot with when called on. The price of the instrument is fair and the instrument seems to be hardy for the lab environment."