Hanna Instruments HI 38077 Instruction manual

Instruction Manual

HI 38077

Phosphate

Test Kit for

Irrigation Water

Range 0 to 5 mg/L (ppm) Phosphate (PO

4

3)

Smallest Increment 0.1 mg/L (ppm) Phosphate

Analysis Method

Sample Size

Colorimetric

7.5 mL

Number of Tests 100

Case Dimensions 235x175x115 mm (9.2x6.9x4.5")

Shipping Weight 429 g (15.1 oz.) www.hannainst.com

Dear Customer,

Thank you for choosing a Hanna Product.

Please read the instruction sheet carefully before using the test kit. It will provide you with the necessary information for correct use of the kit. If you need additional information, do not hesitate to e-mail us at [email protected].

Remove the test kit from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any noticeable damage, notify your Dealer or the nearest Hanna office immediately.

Each kit is supplied with:

• HI 93713-0 Reagent, packets (100 pcs);

• 1 checker disc (containing the 38073 disc);

• 2 glass vials with caps;

• 1 plastic pipette (3 mL).

Note: Any damaged or defective item must be returned in its original packing materials.

Phosphorus occurs in natural waters and in wastewaters almost entirely as phosphates. Large quantity of phosphate arise from laundering industries as it is used in many cleaning preparations, from soil runoff and sewage.

Phosphorus is essential to plants since it contributes to the formation of buds, roots and blooming as well as lignification and its lack results in stifled plants or pale green color with reddish pigmentation on leaves' edges.

On the other hand, an extensive discharge of phosphorus in water is the major cause of eutrophication, which is an abnormal and excessive growth of aquatic plants.

Note: mg/L is equivalent to ppm (parts per million).

Adaptation of the ascorbic acid method. The reaction between phosphate and the reagent causes a blue tint in the sample.

of Phosphate. To convert this result to mg/L (ppm) of

Phosphorus, divide it by 3,1.

READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT

• Using the pipette, add to each glass vial 7.5 mL of sample (up to the mark).

7.5 mL

• Insert one of them into the left hand opening of the checker disc. This is the blank.

• Add to the other glass vial 1 packet of HI 93713-0

Reagent. Replace the cap and shake vigorously for 20 seconds. This is the reacted sample.

For best results: Perform the reading three times and take the average value (divide by 3 the sum of the three numbers). Intensely colored samples will make the color matching determination difficult and they should be adequately treated before performing the test. Suspended matter in large amounts should be removed by prior filtration.

Caution: Ultraviolet radiation may cause fading of colors.

When not in use, keep the disc protected from light, in a cool and dry place.

Interferences: iron above 5 ppm; copper above 10 ppm; hydrogen sulfide, arsenate and highly buffered samples.

• Wait for 3 minutes.

• Remove the cap and insert the reacted sample into the right hand opening of the checker disc.

• Hold the checker disc so that a light source illuminates the samples from the back of the windows.

• Keep the checker disc at a distance of 30-40 cm (12-

16") from the eyes to match the color. Rotate the disc while looking at the color test windows and stop when you find the color match. Read the value in the result window, divide it by 10 and record it in mg/L (or ppm)

APHA, AWWA, WEF, Standard Methods for the Examina- tion of Water and Wastewater , 18 th edition, 1992

The chemicals contained in this kit may be hazardous if improperly handled. Read the relevant Health and Safety

Data Sheet before performing this test.