The HI96713 portable photometer is for the measurement of phosphate. Hanna's portable photometers feature an advanced optical system; the combination of a special tungsten lamp, a narrow band interference filter, and silicon photodetector ensure accurate photometric readings every time. The Hanna exclusive CAL Check™ feature utilizes ready-made, NIST traceable standards to verify both meter validation and calibration. The exclusive cuvette locking system ensures that the cuvette is inserted into the measurement cell in the same position every time to maintain a consistent path length.
CAL Check™ - Allows for performance verification and calibration of the meter using a CAL Check NIST traceable secondary standard.
GLP - Records the date of the last user calibration performed.
Built in timer - Ensures the appropriate reaction time is used for the chemical reaction. At the end of the timer the meter will automatically take the reading. This feature ensures consistency across multiple users.
Indexing indent on meter - The meter has an indent that allows for a lock and key fit with the cuvette cap. This ensures that the cuvette is indexed consistently (same position) in order to maintain the same path length for accurate results.
Cooling Lamp Indicator - It is necessary to maintain a consistent temperature of the optical components in order to maintain a narrow wavelength band of light. This photometer has a cooling lamp indicator that is displayed for a short period of time before each measurement in order to allow the components to cool and obtain the highest accuracy possible.
Error messages - Messages on display alerting to problems including no cap, over range and under range readings, and light source error.
Auto-shut off - Automatic shut off after 10 minutes of non-use when the meter is in measurement mode. Prevents wastage of batteries in the event the meter is accidentally not turned off.
Battery status indicator
The instrument has a battery level indicator to display reaming life as follows:
• 3 lines for 100 % capacity
• 2 lines for 66 % capacity
• 1 line for 33 % capacity
• Battery icon blinks when the capacity is less than 10 %.
Units of measure - Appropriate unit of measure is displayed along with reading.
Phosphates are present in a number of products that are used by humans everyday. Some examples of the effects of phosphates are enhancing the flavor and tartness of cola drinks, as a buffering agent in controlling pH in antifreeze and delaying darkening of cut potatoes used in making french fries. Phosphates are also extensively used in detergents and cleaning fluids because of their ability to soften water and remove soil deposits.
Phosphates are particularly important for the growth and development of plant roots, and hence are one of the most common fertilizers used in agriculture. However, high concentrations of phosphates in agricultural runoff can cause environmental pollution, as they are a primary cause of eutrophication. Local laws govern the use of phosphates and the discharge levels into streams.
The HI96713 uses an adaptation of the ascorbic acid method to measure phosphate concentrations of less than 2.50 mg/L (ppm). When the reagent is added to samples containing phosphate, the sample will turn a blue hue; the greater the concentration, the deeper the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complementary color, and the emitted radiation is dependent upon concentration. For low levels of phosphate, a narrow band interference filter at 610 nm (orange) allows only orange light to be detected by the silicon photodetector and omits all other visible light emitted from the tungsten lamp. As the change in color of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases.
The HI96713 is available as a kit (HI96713C) which includes:
- Portable Photometer
- Sample cuvettes (2)
- Caps (2)
- CAL Check™ standards with certificate
- Cuvette cleaning cloth
- Rugged carrying case
- Thermoformed insert for meter and accessories
CAL Check™ standards with certificate
The HI96713-11 CAL Check™standards are used for calibration and performance verification of photometers with the CAL Check™ function.Supplied with Certificate of Analysis
Provided storage containers
- Lot number
- Expiration date
- Standard value @ 25 °C
- Reference meter NIST traceable
- Light tight
- Protects from accidental breakage
Light Source tungsten lamp Light Detector silicon photocell with narrow band interference filter @ 610 nm
Range 0.00 to 2.50 mg/L (ppm) Resolution 0.01 mg/L Accuracy @ 25°C (77°F) ±0.04 mg/L ±4% of reading Method adaptation of the ascorbic acid method Auto-off after ten minutes of non-use in measurement mode; after one hour of non-use in calibration mode; with last reading reminder Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing Weight 360g (12.7oz.) Battery Type 9V battery Dimensions 193 x 104 x 69 mm (7.6 x 4.1 x 2.7”) Ordering Information HI96713 is supplied with sample cuvettes (2) with caps, 9V battery, instrument quality certificate and instruction manual. Warranty 2 years