Manual

PHOTOMETER TEST INSTRUCTIONS

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Nickel does not occur naturally in water but is found in many industrial waste

waters, such as those from the steel and plating industries. It is considered an

undesirable constituent of water, and hence requires close and careful

monitoring. The EC maximum admissible concentration for drinking water (MAC)

is 0.05 mg/l.

The YSI Nickeltest method provides a simple test for the determination of nickel

in water over the range 0 - 10 mg/l Ni. The test responds to both Ni

and Ni

and thus gives a measure of total soluble inorganic nickel content of the water.

Method

In the YSI Nickeltest method, nickel salts are reduced to the nickelous form and

then reacted with nioxime indicator to give a pink colored complex. Reagents

are included to prevent copper interference, and a complexing powder is

provided to prevent iron interference.

The reagents are provided in tablet form and the test is simply carried out by

adding tablets to a sample of the water. The intensity of color produced in the

test is proportional to the nickel concentration and is measured using a YSI

Photometer.

Reagents and Equipment

YSI Nickeltest PR Powder (Spoon Pack)

YSI Nickeltest No 1 Tablets

YSI Nickeltest No 2 Tablets

YSI 9300 or 9500 Photometer

Round Test Tubes, 10 ml glass (PT 595)

Photometer Method

AUTOMATIC

WAVELENGTH

SELECTION

0 – 10 mg/l

PHOT.53.AUTO