A nephelometric turbidity meter must be routinely standardized with a certified light scattering standard. As with any analytical reference material, a high-quality turbidity standard provides a number of key functions: it ensures traceability, verifies the accuracy of results, allows for proper equipment calibration, helps monitor user performance, and facilitates the comparability of results across different analyses and operators. Standardization ensures that following correct procedures will consistently yield reliable and reproducible results.
Hanna turbidity standards are created from AMCO AEPA-1 materials, a proven and highly reliable solution for instrument standardization. These standards are composed of a stable suspension of cross-linked styrene divinylbenzene copolymer microbeads in ultra-pure water. The beads are chemically inert, maintaining their chemical integrity regardless of concentration. Their uniform spherical shape, specific size, and ideal refractive index make them perfect for accurately characterizing light absorption and 90° scatter in the UV-VIS range. This precise physical structure also prevents the microbeads from accumulating or precipitating, which contributes to the superior long-term stability of the standards.
These standards are prepared and bottled in a certified clean room facility, ensuring their purity. Each batch is rigorously tested and validated for both accuracy and stability, with a certification that guarantees they are free from any toxic chemicals. The values of all prepared standards are cross-referenced against formazin turbidity standard solutions. The validated values and the date of analysis are precisely documented on the included Certificate of Analysis.
The HI83749-11 is a complete set of high-quality turbidity calibration standards that enables users to easily validate and calibrate the HI83749 Portable Turbidity and Bentonite Check Meter. The kit includes standards with expected values of <0.1, 10, 15, 100, and 500 NTU, bottled in our state-of-the-art manufacturing facility. These standards are produced in a temperature-controlled environment using reference materials that are traceable to NIST.
Each set is supplied with a Certificate of Analysis which includes:
- Lot number
- Expiration date
- Standard value
- NIST traceable reference meter details
The provided storage containers are:
- Light tight
- Designed to protect against accidental breakage
Validating the turbidity range of the HI83749 meter is a quick and simple process with the HI83749-11 Turbidity Calibration Standards.
