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TEST INSTRUCTIONS - Geotech Environmental Equipment

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CALCIUM & MAGNESIUM (TOTAL)<br />

HARDNESS–UDV<br />

UNIT DOSE VIALS CODE 4309-H<br />

QUANTITY CONTENTS CODE<br />

1 Calcium Hardness Unit Dose Vials, 10 pouches 4309-H<br />

<strong>Equipment</strong> needed but not supplied:<br />

STANDARD ACCESSORY PACKAGE CODE 1961<br />

1 Package of 3 Vials (empty) 0156<br />

1 Syringe, 3 mL, plastic 1184<br />

1 Foil Storage Bag 9467<br />

Or:<br />

ADVANCED ACCESSORY PACKAGE CODE 1962<br />

1 Pipettor 30528<br />

1 Pipet Tips (0-5 mL) 30695<br />

1 Cuvette Rack 31695<br />

1 Package of 3 Vials (empty) 0156<br />

1 Foil Storage Bag 9467<br />

APPLICATION: Drinking and surface waters; swimming pool water.<br />

RANGE: 0–400 ppm as CaCO3 Total Hardness<br />

METHOD: Calcium and magnesium react in a strongly buffered medium<br />

with an indicator to develop a pale purple color in<br />

SAMPLE<br />

HANDLING &<br />

PRESERVATION:<br />

proportion to the concentration.<br />

Samples should be analyzed as soon as possible after<br />

collection. If storage is necessary, add 0.5 mL of 20 %<br />

hydrochloric acid per 100 mL of sample. However, the added<br />

acid will have to be neutralized with NaOH before testing.<br />

INTERFERENCES: Heavy metals will interfere.<br />

Smart2 <strong>TEST</strong> PROCEDURES 2.04 Calcium & Magnesium (Total) Hardness–UDV 1/2

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