Conductivity testing of effluents 2

What are some very important safety precaustions to take while measuring the conductivity of an unknown sample solution?

• Make sure you are not standing in a puddle of water while perforrming the test and wearing rubber soled shoes

• It is recommended that you always wear a cove T-shirt and latex gloves during and after the conductivity test

• There are not any real safety concernes with this test

• It is recommended that one wears latex gloves, safety glasses, and a lab coat while working with effluent samples

What molarity is the reagent supposed to be?

• NaOH standard solution 0.0100μ

• NaOH standard solution 0.00100μ

• KCl standard solution 0.0100μ

• KCl standard solution 0.00100

What is the correct Quality control for dealing with samples that require conductivity testing?

• Duplicate analysis run every 10 samples, or once per batch

• Duplicate analysis run every 20 samples, or once per batch

• Duplicate analysis run every 15 samples, or once per batch

• Duplicate analysis run every 30 samples, or once per batch

What is the proper storage and preservation temperature for water samples that are needing conductivity run on them?

• The sample should be stored at 4 degrees celsius + or - 2 degrees celsius and brought to 25 degrees celsius + or - 1 degree celsius before conductivity is measured

• The sample should be stored at 4 degrees celsius and brought to exactly 25 degrees celsius before conductivity is measured

• The sample should be stored at 2 degrees celsius + or - 2 degrees celsius and brought to 25 degrees celsius + or - 2 dgree celsius before conductivity is measured

• The sample should be stored at 2 degrees celsius + or - 4 degrees celsius and brought to 25 degrees celsius + or - 1 dgree celsius before conductivity is measured

What is the correct formula for conductivity?

• K = G*[A/L]

• G = K*[A/L]

• G = K*A/L

• [G]=[K*]/ [A][L]

Waste management includes

• Directions about how to run a real conductivity test

• an explanation of how to safely dispose effluent water after testing is complete

• an explanation of how if samples are deemed non-toxic, they can be rinsed down the sink with tap water

• both B and C

What must an analyst be able to do according to the DOC before they can run tests on their own?

• Analyzing 5 samples that fall within + or - 2 %

• Analyzing 2 samples that fall within + or - 20 %

• Analyzing 4 samples that fall within + or - 10 %

• Analyzing 4 samples that fall within + or - 1% recovery limits

According to the SOP what equipment and supplies are necessary to do a conductivity test?

• Erlenmeyer flask for the reagent, thermo scientific Orion Verastar Pro benchtop meter

• Thermo Scientific Orion VersaStar Pro benchtop meter, Orion 013005MD, Conductivity cell,

  Plastic container to hold sample, (50-200ml)

  Container to hold DI water

• Safety glasses, latex gloves, OSU cap, and Cove T-shirt

• Thermo Scientific Orion VersaStar Pro benchtop meter, Orion 013005MD, and a Conductivity cell

What are the appropriate steps for the conductivity procedure?

• First, a check standard and duplicate must be run first (acceptance limits for both are + or -

  10% of true value; or less

  Next, samples can now be analyzed by simply inserting the probe (making sure sensors are

  submerged) into sample cup and stirring gently. Be sure to rinse probe with each new sample

  matrix.

• First, a check standard and duplicate must be run first (acceptance limits for both are + or -

  10% of true value; or less

  Next, samples can now be analyzed by simply inserting the probe (making sure sensors are

  submerged) into sample cup and stirring gently. Be sure to rinse probe with each new sample

  matrix, then record the values in the log

• First, samples can be analyzed by simply inserting the probe (making sure sensors are

  submerged) into sample cup and stirring gently. Be sure to rinse probe with each new sample

  matrix.

• First, samples can be analyzed by simply inserting the probe (making sure sensors are

  submerged) into sample cup and stirring gently.

According to the Cove SOPs what is the best way to correct out of control data

• Recalibrate and run a standard check,

  All samples ran in the set must be re-measured,

  new standards should be made if necessary

• Tell the Quality Manager, then Recalibrate and run a standard check,

  All samples ran in the set must be re-measured,

  new standards should be made if necessary

• See Cove Aquatic Toxicity Laboratory Quality Manual section 14 for further

  instruction only

• Recalibrate and run a standard check,

  All samples ran in the set must be re-measured,

  new standards should be made if necessary

  See Cove Aquatic Toxicity Laboratory Quality Manual section 14 for further

  instruction