. "[48165CC36EEA]" . "V pr\u00E1ci jsou uvedeny n\u011Bkter\u00E9 poznatky ze stanoven\u00ED celkov\u00E9ho dus\u00EDku v odpadn\u00EDch vod\u00E1ch metodou oxida\u010Dn\u00ED mineralizace peroxodis\u00EDranem, kdy se dus\u00EDkat\u00E9 l\u00E1tky p\u0159ev\u00E1d\u011Bj\u00ED na dusi\u010Dnany a n\u00E1sledn\u011B se m\u011B\u0159\u00ED absorbance. Na re\u00E1ln\u00FDch vzorc\u00EDch byla ov\u011B\u0159ena mo\u017Enost stanovit vznikaj\u00EDc\u00ED dusi\u010Dnany p\u0159\u00EDmo v mineraliz\u00E1tech z rozd\u00EDlu absorbanc\u00ED p\u0159i 216 nm a 218 nm. T\u00EDmto zp\u016Fsobem se \u00FA\u010Dinn\u011B koriguj\u00ED ru\u0161iv\u00E9 vlivy nedokonale rozlo\u017Een\u00E9 matrice vzork\u016F. Spojen\u00EDm oxida\u010Dn\u00ED mineralizace a UV fotometrie vznik\u00E1 jednoduch\u00E1, rychl\u00E1 a ekonomicky nen\u00E1ro\u010Dn\u00E1 metoda, vhodn\u00E1 hlavn\u011B p\u0159i anal\u00FDz\u00E1ch velk\u00FDch s\u00E9ri\u00ED vzork\u016F vod. D\u00E1le byla sledov\u00E1na v\u00FDt\u011B\u017Enost oxida\u010Dn\u00ED mineralizace amonn\u00FDch iont\u016F. I kdy\u017E literatura uv\u00E1d\u00ED hodnoty v\u00FDt\u011B\u017Enosti kolem 100 %, bylo zji\u0161t\u011Bno, \u017Ee v modelov\u00FDch roztoc\u00EDch p\u0159i koncentrac\u00EDch amoniak\u00E1ln\u00EDho dus\u00EDku nad 5 mg/l doch\u00E1z\u00ED k v\u00FDrazn\u00E9mu poklesu v\u00FDt\u011B\u017Enosti pravd\u011Bpodobn\u011B \u00FAnikem NH3 do parn\u00ED f\u00E1ze nad roztokem, kter\u00FD v\u0161ak u re\u00E1ln\u00FDch vzork\u016F pozorov\u00E1n nebyl. P\u0159id\u00E1v\u00E1n\u00EDm formaldehydu se \u00FA\u010Dinnost oxidace NH4+ v\u00FDrazn\u011B zv\u00FD\u0161ila a\u017E na 1"@cs . "1"^^ . "Contribution to determination of total nitrogen in waste waters by peroxodisulfate oxidation"@en . "2"^^ . . . . . "6"^^ . "P\u0159\u00EDsp\u011Bvek ke stanoven\u00ED celkov\u00E9ho dus\u00EDku v odpadn\u00EDch vod\u00E1ch metodou oxida\u010Dn\u00ED mineralizace peroxodis\u00EDranem"@cs . "Total nitrogen; oxidative mineralization; UV absorption spectra; waste waters"@en . "RIV/61989100:27360/08:00021979" . "P\u0159\u00EDsp\u011Bvek ke stanoven\u00ED celkov\u00E9ho dus\u00EDku v odpadn\u00EDch vod\u00E1ch metodou oxida\u010Dn\u00ED mineralizace peroxodis\u00EDranem"@cs . "7" . . . . "S" . . . "27360" . "389647" . "P\u0159\u00EDsp\u011Bvek ke stanoven\u00ED celkov\u00E9ho dus\u00EDku v odpadn\u00EDch vod\u00E1ch metodou oxida\u010Dn\u00ED mineralizace peroxodis\u00EDranem" . . "102" . . "Chemick\u00E9 listy" . "0009-2770" . "P\u0159\u00EDsp\u011Bvek ke stanoven\u00ED celkov\u00E9ho dus\u00EDku v odpadn\u00EDch vod\u00E1ch metodou oxida\u010Dn\u00ED mineralizace peroxodis\u00EDranem" . "Contribution to determination of total nitrogen in waste waters by peroxodisulfate oxidation"@en . "RIV/61989100:27360/08:00021979!RIV10-MSM-27360___" . . "V pr\u00E1ci jsou uvedeny n\u011Bkter\u00E9 poznatky ze stanoven\u00ED celkov\u00E9ho dus\u00EDku v odpadn\u00EDch vod\u00E1ch metodou oxida\u010Dn\u00ED mineralizace peroxodis\u00EDranem, kdy se dus\u00EDkat\u00E9 l\u00E1tky p\u0159ev\u00E1d\u011Bj\u00ED na dusi\u010Dnany a n\u00E1sledn\u011B se m\u011B\u0159\u00ED absorbance. Na re\u00E1ln\u00FDch vzorc\u00EDch byla ov\u011B\u0159ena mo\u017Enost stanovit vznikaj\u00EDc\u00ED dusi\u010Dnany p\u0159\u00EDmo v mineraliz\u00E1tech z rozd\u00EDlu absorbanc\u00ED p\u0159i 216 nm a 218 nm. T\u00EDmto zp\u016Fsobem se \u00FA\u010Dinn\u011B koriguj\u00ED ru\u0161iv\u00E9 vlivy nedokonale rozlo\u017Een\u00E9 matrice vzork\u016F. Spojen\u00EDm oxida\u010Dn\u00ED mineralizace a UV fotometrie vznik\u00E1 jednoduch\u00E1, rychl\u00E1 a ekonomicky nen\u00E1ro\u010Dn\u00E1 metoda, vhodn\u00E1 hlavn\u011B p\u0159i anal\u00FDz\u00E1ch velk\u00FDch s\u00E9ri\u00ED vzork\u016F vod. D\u00E1le byla sledov\u00E1na v\u00FDt\u011B\u017Enost oxida\u010Dn\u00ED mineralizace amonn\u00FDch iont\u016F. I kdy\u017E literatura uv\u00E1d\u00ED hodnoty v\u00FDt\u011B\u017Enosti kolem 100 %, bylo zji\u0161t\u011Bno, \u017Ee v modelov\u00FDch roztoc\u00EDch p\u0159i koncentrac\u00EDch amoniak\u00E1ln\u00EDho dus\u00EDku nad 5 mg/l doch\u00E1z\u00ED k v\u00FDrazn\u00E9mu poklesu v\u00FDt\u011B\u017Enosti pravd\u011Bpodobn\u011B \u00FAnikem NH3 do parn\u00ED f\u00E1ze nad roztokem, kter\u00FD v\u0161ak u re\u00E1ln\u00FDch vzork\u016F pozorov\u00E1n nebyl. P\u0159id\u00E1v\u00E1n\u00EDm formaldehydu se \u00FA\u010Dinnost oxidace NH4+ v\u00FDrazn\u011B zv\u00FD\u0161ila a\u017E na 1" . "CZ - \u010Cesk\u00E1 republika" . "Holack\u00FD, Miroslav" . . "In the titled method, nitrates are determined in mineralizates by measuring the difference in absorbances at 216 and 218 nm.Thus effect of imcomplete decomposition of the sample matrix is eliminated. The simple, rapid and inexpensive method combining the oxidation mineralization and UV photometry is suitable for analysis of large series of water samples. The yield of oxidative mineralization of NH3 decreases at concentrations higher than 5 mg/l. An addition of CH2O eliminates the loss of NH3 due to the formation of NH3-CH2O condensation products."@en . "Praus, Petr" . .