User Guide

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Instruction Manual

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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 tech@hannainst.com.

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 38058-0 pH 4.0-10.0 Reagent, 1 bottle with

dropper (30 mL);

•

1 checker disc (containing the 38058 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.

HI 38058

pH 4.0-10.0

Test Kit

ISTR38058 02/00 PRINTED IN ITALY

pH represents acidity or alkalinity of an aqueous solution

and is proportional to the hydrogen-ion concentration of the

solution. Under neutral conditions water is dissociated into

the OH

and H

ions in equal ratio and hence it has a pH

of 7. When bases or acids are added to a water solution

they ionize, increasing the concentration of OH

or H

respectively. Thus solutions with a pH of 1-3 contain strong

acids, whereas those with a pH of 4-6 contain weak acids.

Weak bases result in solutions of pH 8-10 and strong bases

in pH of 11-13.

Examples of pH value for some liquids:

LiquidLiquid

Liquid

pH ValuepH Value

pH Value

Sea water 7.8-8.2

Gastric juices 1.7

Milk 6.5-7

Soil 6-7 (optimum for crops)

Range 4.0 to 10.0 as pH unit

Smallest Increment 0.5 as pH unit

Analysis Method Colorimetric

Sample Size 5 mL

Number of Tests 300

Case Dimensions 165x150x38 mm (6.5x5.9x1.5")

Shipping Weight 215 g (7.6 oz.)

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SIGNIFICANCE AND USESIGNIFICANCE AND USE

SIGNIFICANCE AND USE

CHEMICAL REACTIONCHEMICAL REACTION

CHEMICAL REACTION

HI 38058-0 reagent reacts in contact with the aqueous

solution changing its color according to the hydrogen-ion

concentration (pH) in the given range.

READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT

Note

Always shake the reagent bottle be-

fore use.

• Using the plastic pipette, fill each glass

vial with 5 mL of sample (up to the

mark).

• Insert one of them into the left hand

opening of the checker disc. This is the

blank.

• Add to the other glass vial 2 drops of HI 38058-0

reagent. Replace the cap and mix the solution by

gently swirling. This is the reacted sample.

• Remove the cap and in-

sert the reacted sample

into the right hand open-

ing of the checker disc.

• Hold the checker disc so

that a light source illumi-

nates the samples from

the back windows.

REFERENCESREFERENCES

REFERENCES

Vogel's, Quantitative Chemical Analysis, 5

Ed., Longman

Scientific & Technical.

HEALTH AND SAFETYHEALTH AND SAFETY

HEALTH AND SAFETY

The chemicals contained in this kit may be hazardous if

improperly handled. Read the relevant Health and Safety

Data Sheet before performing this test.

• 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 directly in pH units.

Note: A concentration of Chlorine above 50 ppm causes

interference inhibiting the development of the color.

In this case require the HI 38058/O Test Kit.

For best results: 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 re-

moved 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.

INSTRUCTIONSINSTRUCTIONS

INSTRUCTIONS