Horiba 300-NH4-C

Ammonium (NH4+) ion-selective electrode for 300 series

The new electrode is suitable for the LAQUA WQ-300 series from Horiba and offers precise and reliable measurements for ions in aqueous solutions. It is characterized by its user-friendly handling and environmentally friendly design and is versatile in use

Features:

• Measurement parameters: Ammonium solid-state electrodes that do not require refilling
• Double junction made of porous sintered polyethylene
• Integrated temperature sensor
• Environmentally friendly design made from bio-based plastic
• Supplied with calibration and ionic strength adjustment solutions
• Robust housing made of polycarbonate and PVC
• Low maintenance, simply rinse and seal Waterproof according to IP67

Linearity in the measuring range:

The range in which the calibration curve shows linearity is called the measuring range. If a lower concentration is measured at which the linearity is not given, the calibration must be carried out at two points in the lower concentration range.

Influence of the pH value:

The ammonia electrode can be used in a pH range from 5 to 8. The influence of the pH value can cause a decrease in the slope of the ion-selective electrode or a parallel shift of the calibration curve. To avoid these effects, set the pH value to a suitable value in advance and keep it constant.

 Interfering ions:

Ion-selective electrodes have good selectivity with respect to the ions being measured, but can react to other ions. When using the ion electrode method, it is important to be aware of the effects of coexisting ions and to take measures to avoid them. Interfering ions can form compounds with poor solubility or form complex salts with the structural material of the ion-selective membrane, which can significantly affect the measured value.

Conditioning:

An electrode is conditioned by immersing it in a standard solution for 1 hour or longer. Use a standard solution with a concentration of 100 mg/L or more. In the following cases, the electrode must be conditioned before calibration. Before first use. Before use after storage for 2 weeks or longer. When the electrode is less sensitive.

Calibration:

Always calibrate with at least 2 calibration solutions that are a decade apart and include the expected reading. Use fresh calibration solutions and do not reuse them.

- Below 10 ppm (mg/L)

First solution between 1 and 10 ppm

Second solution between 10 and 50 ppm

- Between 10 and 100 ppm (mg/L)

First solution between 10 and 100 ppm

Second solution between 100 and 1000 ppm

- Over 100 ppm (mg/L)

First solution between 100 and 1000 ppm

Second solution above 1000 ppm

Further information can be found in the download area of the store.