Ethics Its My Job

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Ethics Its My Job

• Metals
• 12/13/06

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(No Transcript)
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Metals Chemists

• Instruments
• William Boyd, MS
• Vaughn Machristie
• Alvin Hawkins

• Preparations
• Perry Davis
• Todd Senior

• Night Weekend Crew
• Ricky Boyd
• Tameka Loyd
• Lindsay Metzger

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Testing

• Type of samples
• Drinking water
• Waste water
• Sludge
• Soil

• Tests Run
• 747s (EPA 245.1)
• 301s (EPA 200.2)
• TKN (EPA 351.2)
• SUVAs
• SAR (EPA 600/2-78-054)
• DMF (EPA SM 3030 B)
• CR6 (SM 3500-Cr B)

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Why We Test

• Listed as primary pollutants
• Some metals can be toxic if ingested

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A Walk Through 301L

• Prep Procedure
• 301L 30TS / Acid Digestion to Prepare Aqueous
  Samples for Metals Analysis, Rev.05
• Performed by trained personnel
• HNO3 preserved
• 50 mL of sample in digestion tube
• Specified amount of Spiking solution
• 0.5 mL of HNO3
• 0.5 mL of HCl
• Cover
• Place in hot block (95C 2 ) for 245
• QC Requirements Blank, LCS, matrix spike, matrix
  spike duplicate

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Spikes
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Hot Block
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Sample Digestion

• Let samples cool
• Bring sample to volume (50mL) with water
• Enter data into LDS
• Label tubes with sample number, bottle number,
  date, technician, digestion method
• Label caps with elements to run
• Take to instrument room for metal analysis

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Benchsheets - traceability
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Mass Spectrometer
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Starting Machine

• Light Argon Torch
• Perform HP tune
• Make daily standards for Calibration Curve
• Change Rinse water
• Enter Data into daily Maintenance Log
• Change tubing
• Clean glassware
• Clean Cones

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QC on MS

• Daily Calibration Curve
• Blank
• ICV
• CCV
• 100, 200, 300 ppb Standards
• ICS A B
• FRB
• CCB
• AWRL
• IS

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Typical Run on MS
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At the Computer

• Anomalies
• QC
• Compliance
• Limits

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No Room for Error

• Total Honesty
• Correct temperature
• Client limits
• Reagent reliability
• Precision and Accuracy
• Parts per Billion
• Spiking amounts
• Pipette calibration
• Proper volumetric measurements

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Metals

• Were a Great Team!