TM 10-6630-245-13&P
2.6.8.9. Zinc Test. High Range.
a.
Purpose of Test: To determine the amount of zinc dissolved in water.
b.
Range: 2.0 to 20 ppm
c.
Equipment Used: Found in Zinc Test Kit, para 2.6.5, fig. 2-11
Zinc comparator, (1), fig. 2-11
Zinc reagent, (2), fig. 2-11
Measuring spoon, 0.05g, (3), fig. 2-11
Measuring spoon, 0.5g, (4), fig. 2-11
Zinc conditioning reagent, (5), fig. 2-11
Two graduated test tubes, (6), fig. 2-11
Dropping pipet, 1.0 ml, (7), fig. 2-11
Deionized water, (8), fig. 2-11
d.
General Techniques Used: Refer to paragraphs cited below as required by procedure.
Planning the Test, para 2.6.1.1
Cleaning Glassware, para 2.6.1.2
Handling and Storing Reagents, para 2.6.1.3
Collecting Water Samples, para 2.6.1.4
Mixing, para 2.6.1.5
Using Pipets, para 2.6.1.7
Titrating, para 2.6.1.8
e.
Test Procedure:
(1)
Make sure both graduated test tubes(6, fig. 2-11) are clean. Rinse both with about an ml of deionized
water(8). Use one of the tubes to collect about a half test tube of sample water.
(2)
Use the 1 ml dropping pipet(7) to transfer I ml (one dropping pipet full) of the sample water to the empty
graduated test tube.
WARNING
ZINC CONDITIONING REAGENT
Irritating to eyes, skin and respiratory tract. For test purposes only. Ingestion can cause nausea,
damage mucous membranes, vomiting, pain and circulatory collapse. Do not allow contact with
skin or eyes. Do not breathe dust. In case of contact, flush eyes with water for at least 15
minutes. Get immediate medical attention. Wash skin with soap and water. In case of ingestion,
get immediate medical attention. In case of inhalation, remove victim to fresh air.
(3)
Add one level small spoonful(3)(marked 0.05mg/l) of zinc conditioning reagent(5) to the test tube
containing 1 ml of sample water at this point.
(4)
Fill the tube that contains 1 ml of sample with deionized water(8) up to the mark etched on the tube.
WARNING
ZINC REAGENT
Irritating to eyes, skin and mucous membranes. Chronic effects: carcinogen. For test purposes
only. Do not ingest or allow contact with skin or eyes. Do not breathe dust. In case of contact,
flush eyes with water for at least 15 minutes. Get immediate medical attention. Wash skin with
soap and water. In case of ingestion, get immediate medical attention. In case of inhalation,
remove victim to fresh air.
(5)
Use the large measuring spoon(4) (marked 0.5g). Add one level spoonful of zinc reagent(2).
NOTE
Do not shake tube longer than 15 seconds.
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