Accurately determine strontium levels in your reef aquarium. Seachem Strontium Test Kit has been revised to offer a dramatic decrease in the amount of time necessary to complete a strontium test. The former 45 minute to 1 hour process has been shortened to a mere 10 minutes. Reef Status Strontium Test Kit measures strontium by first separating the strontium in the sample water by chemical precipitation and filtration, followed by a sensitive titration process. Contains 50 titration tests for strontium, precise to 0.5 mg/L.
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Note: RO water may not be sufficiently pure, de-ionized (or distilled) water must be used.
Place the collection vial on the white square of the color chip provided and titrate with the syringe (i.e. dispense titrant solution to the contents of the collection vial from Step 5) until the color most closely matches either of the two blues on the color chip (or as noted in Step 5c).
Gently shake the collection vial after each drop. Once a color match is obtained, withdraw into the syringe any titrant hanging from the tip of the syringe so that the titrant is flush with the tip. If you're not sure if you have reached the endpoint, add 2 or 3 more drops. If you see no substantial change in color then you were at the endpoint. In this case, you would take the reading when you first noted no more change in color. Read dispensed volume from the "cc" side of the syringe and compare with the chart on the reverse to determine strontium level.
Natural seawater concentration for strontium is approximately 8 mg/L. By contrast, magnesium is present at about 1,300 mg/L and calcium at about 400 mg/L; together they exceed strontium by over 200 fold. Magnesium and calcium are chemically quite similar to strontium; thus, the measurement of strontium in the presence of high concentrations of magnesium and calcium with this kit requires meticulous attention to the instructions. To get the correct perspective, imagine that you are trying to find and count 8 lavender marbles in a jar containing 1,300 purple and 400 magenta marbles.