AMoN Bodies and Travel Blanks

Portland, OregonApril 2012

Cleaning Radiello Bodies

Single wash with DI water and sonication

Triple wash with DI water and sonication

Above, followed by vacuum desiccator (7 days)- filter paper (with citric acid)- radiello core (with phosphoric acid)

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X

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0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

Ammonium in bodies soaked for 24 hours placed in hood to dry 48 hours

Freezer Glass jars Box Storage Glass jars Hood Montoring

Amm

oniu

m (m

g/L)

Hood 1 Month

2 weeks

2 weeks

Month

762 241,359 308

Scanning Electron Microscopy• Three bodies tested

– New blue sampler body– Used, unwashed blue sampler body– Used white sampler body

• All sampler bodies ~uniform in appearance

• No visual difference between used blue sampler bodies and new blue sampler bodies

• Visual differences between blue sampler bodies and white sampler bodies

White BodyBlue Body

SEM: 100x magnification, interior wall

SEM: 500x magnification

Blue Body White Body

SEM: 8,000x magnification

Blue Body White Body

Mercury Intrusion Porosimetry ResultsPorosity (%)

Test ACY SB AAA1 48.64 47.65 48.002 51.47 51.23 51.293 56.94 54.05 48.774 52.03 50.95 50.00

Mean 52.27 50.97 49.52

Mercury Intrusion Porosimetry ResultsMedian Pore Diameter (μm)

Test ACY SB AAA1 43.68 35.72 38.822 41.74 38.14 43.233 46.76 41.42 41.634 37.00 35.83 38.99

Mean 42.30 37.78 40.67