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You will typically only see this standard used in “high-purity” environments:
Pharmaceutical Manufacturing: Ensuring “Water for Injection” (WFI) or Purified Water (PW) meets strict pharmacopeia standards (like USP <645>).
Semiconductor Fabrication: Monitoring the ultra-pure water (UPW) used to wash silicon wafers, where any ionic residue can destroy a microchip.
Power Plant Boilers: Monitoring demineralized water used in high-pressure steam turbines to prevent corrosion and scale at a microscopic level.
Laboratory Analysis: Calibrating benchtop meters used for trace-element research.
A Conductivity Standard Solution of 2.0 µS/cm at 25°C is an extremely low-range calibration standard. It is used for high-sensitivity measurements where even the slightest mineral contamination can compromise a process.
Because this value is so close to the conductivity of pure water (approx. 0.055 µS/cm), it is considered a trace-level standard.
Conductivity Value: 2.0 µS/cm (microsiemens per centimeter).
Alternative Units: Equivalent to 0.002 mS/cm.
Resistivity Equivalent: Approximately 0.5 MΩ·cm (Megaohm-centimeters).
Sensitivity: This solution is highly unstable compared to higher-range standards. It is extremely sensitive to atmospheric CO2 contamination.
A Conductivity Standard Solution of 2.0 µS/cm at 25°C is an extremely low-range calibration standard. It is used for high-sensitivity measurements where even the slightest mineral contamination can compromise a process.
Because this value is so close to the conductivity of pure water (approx. 0.055 µS/cm), it is considered a trace-level standard.
Conductivity Value: 2.0 µS/cm (microsiemens per centimeter).
Alternative Units: Equivalent to 0.002 mS/cm.
Resistivity Equivalent: Approximately 0.5 MΩ·cm (Megaohm-centimeters).
Sensitivity: This solution is highly unstable compared to higher-range standards. It is extremely sensitive to atmospheric $CO_2$ contamination.
You will typically only see this standard used in “high-purity” environments:
Pharmaceutical Manufacturing: Ensuring “Water for Injection” (WFI) or Purified Water (PW) meets strict pharmacopeia standards (like USP <645>).
Semiconductor Fabrication: Monitoring the ultra-pure water (UPW) used to wash silicon wafers, where any ionic residue can destroy a microchip.
Power Plant Boilers: Monitoring demineralized water used in high-pressure steam turbines to prevent corrosion and scale at a microscopic level.
Laboratory Analysis: Calibrating benchtop meters used for trace-element research.
The biggest challenge with a 2.0 µS/cm standard is its short shelf life once opened.
When the bottle is opened, Carbon Dioxide (CO2) from the air immediately begins to dissolve into the liquid. This creates carbonic acid, which releases ions and causes the conductivity to rise rapidly—often jumping from 2.0 to 3.0 µS/cm in just a few minutes of exposure.
To maintain accuracy:
Use Immediately: Calibrate your meter as fast as possible after pouring the solution.
Airtight Storage: Use specialized “single-shot” sachets if available, or keep the bottle capped tightly until the very second you need it.
Flow-Through Cells: For the highest accuracy, these sensors are often calibrated in a closed “flow-through” system to prevent any air contact.
TINDAKAN PENCEGAHAN UNTUK PENANGANAN YANG AMAN
Untuk tindakan pencegahan, lihat bagian 2.2 dalam SDS.
KONDISI PENYIMPANAN YANG AMAN, TERMASUK KETIDAKCOCOKAN
a. Kondisi penyimpanan
Tertutup rapat.
Suhu penyimpanan : Rekomendasi suhu penyimpanan lihat pada label
b. Kelas penyimpanan
Kelas penyimpanan (TRGS 510): 12: Cairan Tidak Mudah Terbakar
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