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An overvie An overvie ew of approved ew of approved methods and - - PowerPoint PPT Presentation
An overvie An overvie ew of approved ew of approved methods and - - PowerPoint PPT Presentation
An overvie An overvie ew of approved ew of approved methods and candidate method d capabilities Wi lliam Lipps OI Analytical Char rles J. Patton U.S. Ge eological Survey National Wate er Quality Laboratory Nitrite 353.2 (RSD)
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Nitrate+N Nitrite 353.2 (RSD)
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Parameter Parameter
Ammonia as N Ammonia as N Nitrate-nitrite as N Orthophosphate as P Total Phosphorus Total Kjeldahl-Nitroge real MDL "EPA meth real MDL (mg/L "EPA meth MDL (mg
0.08
0.01
0.03
0.01 P
0.023
0.01
0.023
0.01 en
0.4
0.01
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Isn t it time fo
- r something new?
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Waveguides Ammonia with 2 m pat d B h l i and Berthelot reaction
MDL 0 07 b
- MDL = 0.07 ppb
- 40 X decrease
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Condu Simple, accur
Diffusion Diffusion
uctivity for Ammonia y rate, small sample volumes MDL = 1 ppb
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Fluoro M
- metric Ammonia
LED Source LED Source MDL ~ 0.3 ppb
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MDL = 3 x decrease for Nitrite
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- f ph
hosphorus
100 X concentration 100 X concentration factor
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Photo Credit: Peter Rejcek
Cont
Samp
tamination of:
Reagents g pling apparatus Water
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