Hanna Instruments hi 3846 User Manual

SPECIFICATIONS

Instruction Manual

www.hannainst.com

Dear Customer,
Thank you for choosing a Hanna Product. Please read the
instructions carefully before using the chemical test kit. It
will provide you with the necessary information for correct
use of the kit.
Remove the chemical 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 dam-
age, notify your Dealer or the nearest Hanna office
immediately.
Each kit is supplied with:

• HI 3846-0 Reagent, packets (100 pcs);
• 1 color comparator cube.

Note: Any damaged or defective item must be returned in

its original packing materials.

SPECIFICATIONS

HI 3846

Chromium

Test Kit

ISTR3846 05/99 PRINTED IN ITALY

Range

0 to 1.0 ppm as Cr(VI)

Smallest Increment

0.2 ppm

Analysis Method Colorimetric, diphenylcarbohydrazide
Sample Size

5 mL

Number of Tests

100 (average)

Case Dimensions

230x59x70 mm (9.0x2.3x2.8")

Shipping Weight

160 g (5.6 oz.)

SIGNIFICANCE AND USE

CHEMICAL REACTION

Chromium(VI) reacts with diphenylcarbohydrazide to form a
purple product in an acidic buffered condition. The amount
of color developed is proportional to the concentration of
chromium present in the aqueous sample.

Chromium salts are widely used in industrial processes, such
as metal finishing and plating industries as well as in the
leather industry as a tanning agent, and in the manufac-

ture of paints, dyes, explosives and ceramics. Chromium
may enter a water supply through the discharge of waste
from these industries and may also be discharged from
chromate-treated cooling waters, where they are frequently
added for corrosion control. The hexavalent state of chro-
mium is toxic to humans, animals and aquatic life: it can
produce lung tumors when inhaled and readily induces skin

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

INSTRUCTIONS

READ THE ENTIRE INSTRUCTIONS BEFORE USING THE KIT
• Fill one color comparator cube with 5 mL of the sample

(to the mark).

• Add 1 packet of HI 3846-0, replace the cap and shake

well.

• Wait 6 minutes to allow color to develop.

• Determine which color matches the solution in the vessel

and record the results in mg/L (or ppm) of chromium
(VI).

REFERENCES

Standard Methods for the Examination of Water and Waste-
water, 18

ed., 1992

APHA/AWWA/WEF

HEALTH AND SAFETY

The chemicals contained in this test kit may be hazardous if
improperly handled. Read Health and Safety Data Sheets
before performing the test.

• It is better to match the color with a white sheet at

about 10 cm behind the comparator.

Note: To measure Chromium in the 0-1000 ppm range,

use the HI 3845 Chromium Medium Range and
High Range Test Kit.