New Automated Microanalyses for Total Inorganic Fixed Nitrogen and for Sulfate Ion in Water

Lazrus, A. L.; Lorange, E.; Lodge, James P.

doi:10.1021/ba-1968-0073.ch009

Cited by 24 publications

(6 citation statements)

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“…The total SO, content of water samples, determined by an automated turbidimetric method (Lazrus et al 1968), was usu-amount retained on the 0.2pm-pore filally between 4.5 and 5.0 mg-liter-l. dark' due to bacteria (b) and to algae (a) on 2 July can be calculated as (data from Dark uptake of CO,-Samples were in-3-pm-pore filters) cubated in situ for 4-6 h in 125-ml opaque bottles containing 0.20 &i * ml-l 0.70~ + 0.16h = 62% of H14C0,-. Replicate 50-ml subsamples were then filtered through 25-mm, 0.45-0.70(100% -b) + 0.16b = 62% b = 15% pm Millipore filters.…”

Section: Methodsmentioning

confidence: 99%

Measurement of planktonic bacterial production in an oligotrophic lake1

Jordan

Likens

1980

Limnology & Oceanography

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Planktonic heterotrophic bacterial production in Mirror 1,ake (New IIampshirc) was cstimated by several different methods. Production ranged between 3 and 8 g C * m 2* yr-' based on organic C fluxes and the sum of bacterial losses. The close agreement with the estimate of 6.5 * 1.8 (X ? SE) obtained by the ssSOa method (in which bacterial S uptake was multiplied by a C:S ratio of 50) supports the validity of using this method in aerobic freshwaters.

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Section: Methodsmentioning

confidence: 99%

Measurement of planktonic bacterial production in an oligotrophic lake1

Jordan

Likens

1980

Limnology & Oceanography

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“…The collection and determination of nitrate ion in stratospheric samples is described by Lazrus et al (1968Lazrus et al ( , 1972. These samples are converted to NH: and to N, as described above.…”

Section: Introductionmentioning

confidence: 99%

Isotopic measurement of atmospheric nitrogen compounds

Moore

1974

Tellus A: Dynamic Meteorology and Oceanography

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A short review of nitrogen isotope studies as related to atmospheric compounds is presented. Methods utilized for the collection and conversion of various nitrogen containing compounds found in the atmosphere to N, suitable for mass spectrometric measurement are described. Preliminary results obtained on the concentration of and 16N/'4N ratio in N, from NH:, NOC, N,O and NO, in air and other samples are given and the results with respect to NH: and NO; in precipitation are discussed briefly.

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“…Standard procedures adapted and automated for use with a Technicon Autoanalyzer were used for analysis of NH$, N O : , SO^, POZ, ~1 -and dissolved silica. Ammonium was determined by an alkaline phenolhypochlorite method (Solorzano 19691, nitrate by hydrazine reduction (Kamphake et al 1967), sulfate by colormetric measurement of a barium-thymol blue complex (Lazrus et al 1968), chloride by the liberation of thiocyonate ion from mercuric thiocyonate in the presence of ferric iron (O'Brien 1962) and dissolved silica by reduction of silicomolybdate to heteropoly blue with aminonaphtholsulfonic acid (Arner. Public Health Assoc.…”

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confidence: 99%