For the measurement of samples containing free radicals or paramagnetic species.

Application

For chemistry, biology, materials, environment, ecological investigation, food and drug analysis, medicine, earth and ocean, industrial product analysis, etc.

Equipment Description-EMX nano

• Model： EMXnano BENCH-TOP SYSTEM
• Service Items：room temperature measurement, in situ illumination, electrochemical measurement or single temperature measurement at 77K, and variable temperature (100K~340K) measurement

EMXnano

Equipment Description-EMX plus

• Model：EMXplus-10/12/P/L SYSTEM
• Service Items：Single temperature measurement and variable temperature measurement at room temperature or 77K. (110K~300K) can be used for aqueous samples, in situ illumination and electrochemical measurements

EMXplus

Charges

Sample Preparation

1.  It is better to use solid samples. If solid samples need to be dissolved to measure liquid spectra, please indicate the type of solvent.
2.  Solid samples：Place the sample in a quartz tube with an outer diameter of 3-5 mm, with a sample height of approximately 2.5 cm and a volume of about 0.5 mL. If the sample amount is insufficient, a diamagnetic material (commonly KBr) can be added to dilute the sample to a specific height. The typical dilution ratio is about 1:100 by mass.
3.  Liquid samples：

• If it is installed in a quartz tube with an outer diameter of 3-5mm, the height will be about 2.5cm. Generally, the required volume is about 0.5 mL, and the concentration is about 10^-3~10^-6 M
• If measuring in solution form, the solvent used must be specified. If dissolved in a solvent with a high dielectric constant (dielectric constant > 10), the measurement should be conducted inside a capillary. Alternatively, AquaX (a method of injecting liquid samples into the tubing using a syringe for measurement) can be used, and typically the volume of the solution should be greater than 0.5 mL

If the liquid sample is dissolved in a solvent with a large dielectric constant (dielectric constant > 10), please use a thinner test tube; aqueous solution samples need to use special equipment

4.  Gaseous samples：If a gaseous sample needs to be measured, the sample must be sealed in an EPR quartz tube with an appropriate pressure.

Notes

1. Since the conditions applicable to different samples are different, if you have any questions, please contact the operator to discuss the experimental details.
2. For air- and moisture-sensitive samples, please discuss with the operator before submission.
3. For support preparing samples, please also contact a technician first to arrange service.
4. Each measurement of a single parameter per sample is considered as one measurement and will be charged accordingly.
5. The laboratory provides electronic balances, heating stirrers, ultrasonic oscillators, general glassware, and consumables. After use, they must be cleaned and returned to their original condition. Any damages incurred will be charged for accordingly. However, valuable instruments and glove boxes are not available for loan. The laboratory reserves the right to make the final decision on loan requests.
6. If measurement is required, please inform the operator of the following experimental details：

• Sample form (solid, liquid, gas). If liquid, please specify the solvent used
• Paramagnetic species being measured (organic radicals, inorganic transition metals)
• Whether the sample is sensitive to air and moisture
• Number of samples to be measured and number of measurement conditions
• Whether light exposure and duration are required
• Whether temperature-dependent experiments and measurement temperatures are needed
• Whether electrochemical experiments and electrochemical parameters are required

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