Turbidity 100 NTU Calibration Standard – Formazin
When it comes to water quality testing and environmental monitoring, precision is not just an option—it is a strict requirement. The Turbidity 100 NTU Calibration Standard – Formazin is an essential solution designed to ensure your turbidimeters and nephelometers are functioning at peak accuracy when analyzing low-to-mid range samples. Whether you are conducting field measurements, monitoring surface water, or running standard multipoint laboratory calibrations, our ready-to-use Formazin standard provides the exact reliability and traceability you need.
What is a Formazin Turbidity Standard?
Formazin is the only globally recognized and universally accepted primary standard for turbidity calibration. Created by mixing hydrazine sulfate and hexamethylenetetramine, Formazin produces a suspension of particles that uniformly scatter light.
Because of its consistent particle size and unparalleled stability, environmental protection agencies worldwide—including the EPA (Method 180.1) and ISO (Method 7027)—mandate or highly recommend Formazin for calibrating turbidity meters.
Why is the Turbidity 100 NTU Calibration Point Important?
Turbidity is measured in Nephelometric Turbidity Units (NTU). A 100 NTU standard falls into the critical low-to-mid range category of turbidity measurement. Crucially, 100 NTU is a standard intermediate calibration point for most of the world’s leading portable and benchtop turbidimeters (frequently used in a 20, 100, and 800 NTU sequence).
Calibrating your instruments at 100 NTU ensures precise readings for moderately clouded liquids, such as:
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Surface Water & Environmental Monitoring: Assessing sediment and natural runoff levels in rivers, streams, and lakes.
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Municipal Water Treatment: Monitoring intermediate treatment stages before final filtration.
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Industrial & Process Water: Controlling fluid clarity in wash systems and cooling towers to prevent contamination.
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Aquaculture: Monitoring tank and pond water clarity to maintain healthy aquatic environments.
Using a pre-mixed, highly accurate Turbidity 100 NTU Calibration Standard – Formazin eliminates the margin of error associated with complex serial dilutions, saving laboratory and field technicians valuable time while ensuring consistent quality control.
Turbidity 100 NTU Key Features and Benefits
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Exceptional Mid-Range Accuracy: Manufactured under strict laboratory conditions to guarantee an exact 100 NTU value, ensuring your turbidimeter reads intermediate samples correctly every time.
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Ready-to-Use Convenience: No complex mixing or dilution required. Simply invert gently and pour into your sample vial. Perfect for fast field calibrations.
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High Stability & Shelf Life: Formulated to resist rapid settling and degradation, providing a reliable shelf life when stored correctly.
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Regulatory Compliance: Fully compliant with EPA, Standard Methods, and ISO requirements for water and wastewater examination.
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NIST Traceability: Manufactured using high-purity reagents to ensure full traceability to international standards.
Best Practices for Handling and Storage
To maximize the lifespan and accuracy of your Turbidity 100 NTU Calibration Standard – Formazin, follow these critical laboratory guidelines:
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Gentle Inversion: Never shake the bottle vigorously, as this introduces micro-bubbles that will artificially inflate turbidity readings. Gently invert the bottle 5–10 times before use to ensure the particles in this 100 NTU solution are evenly suspended.
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Proper Storage: Store the solution at room temperature (typically between 15°C and 25°C). Do not freeze, as freezing will permanently alter the particle size and ruin the standard. Keep away from direct sunlight.
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Clean Vials: Always use optically clear, scratch-free sample vials. Wipe the outside of the cuvette with a lint-free cloth and silicone oil (if recommended by your meter’s manufacturer) before inserting it into the turbidimeter.
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Avoid Contamination: Never pour used standard back into the original stock bottle. Always discard the used portion properly according to your local safety data sheet (SDS) guidelines.
Frequently Asked Questions
What does NTU stand for?
NTU stands for Nephelometric Turbidity Unit. It is the standard unit of measurement used to quantify the cloudiness or haziness of a fluid caused by suspended particulate matter.
When should I use a 100 NTU standard?
A 100 NTU standard is utilized to calibrate the mid-range of your turbidimeter. It is an essential intermediate point in standard 3-point or 4-point calibration routines (e.g., 20, 100, 800 NTU). It is highly recommended when testing samples that have slight to moderate visible cloudiness, such as river water or process effluents.
Can I use Formazin in any brand of turbidimeter?
Yes. Because Formazin is the primary universal standard, the Turbidity 100 NTU Calibration Standard – Formazin is compatible with all major brands of turbidimeters, including Hach, Hanna Instruments, Thermo Fisher, and WTW.
Ensure Compliance and Accuracy Today Do not compromise on your mid-range water quality analysis. Upgrade your laboratory and field calibration protocols with our highly stable, ready-to-use Turbidity 100 NTU Calibration Standard – Formazin. Optimize your instrument’s performance and guarantee the integrity of your analytical data.