Fresenius J Anal Chem
 1993
DOI: 10.1007/bf00322838
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An efficient flow-injection system with on-line gas diffusion preconcentration for the determination of trace amounts of ammonium nitrogen at ?g/L levels by spectrophotometry

Suhua Fan
1
,
H. A. Müller
2
,
Bettina Schweizer
3
et al.
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Cited by 4 publications
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Immobilization of urease on nanostructured polymer membrane and preparation of urea amperometric biosensor

Gabrovska
1
,
Ivanov
2
,
Vasil`eva
3
et al. 2011
International Journal of Biological Macromolecules
44
0
11
0
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Immobilization of urease on nanostructured polymer membrane and preparation of urea amperometric biosensor

Gabrovska
1
,
Ivanov
2
,
Vasil`eva
3
et al. 2011
International Journal of Biological Macromolecules
44
0
11
0
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Amperometric electrode for determination of urea using electrodeposited rhodium and immobilized urease

Velichkova
1
,
Ivanov
2
,
Marinov
3
et al. 2011
Journal of Molecular Catalysis B: Enzymatic
35
1
14
0
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Nitrogen speciation analysis in solid samples by integrated pervaporation and detection

Papaefstathiou
1
,
Castro
2
1997
Analytica Chimica Acta
18
0
5
0
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