1966
DOI: 10.1021/ac60237a041
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Use of Enzymes in Analytical Chemistry

Abstract: This review surveys the literature and developments from January 1960 through March 1966 with emphasis on the past few years. GENERALBecause it is more reliable, the total change method is generally favored over the rate method. However the former technique can only be used for substrate analysis, and not for E, A, and

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Cited by 41 publications
(7 citation statements)
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“…The amount of NADH consumed, as measured by the change in absorbance at 340 nm, is directly proportionate to the amount of ammonia present. 156,157 While the enzymatic method can provide improved sensitivity over the above-mentioned colorimetric methods, it is highly sensitive to pH and temperature. The optimum pH and temperature were suggested to be 8.0 and 20−25 °C, respectively.…”
Section: Enzymatic Methodsmentioning
confidence: 99%
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“…The amount of NADH consumed, as measured by the change in absorbance at 340 nm, is directly proportionate to the amount of ammonia present. 156,157 While the enzymatic method can provide improved sensitivity over the above-mentioned colorimetric methods, it is highly sensitive to pH and temperature. The optimum pH and temperature were suggested to be 8.0 and 20−25 °C, respectively.…”
Section: Enzymatic Methodsmentioning
confidence: 99%
“…This method is based on the oxoglutarate–glutamate dehydrogenase–NADH system, in which the reductive amination of 2-oxoglutarate is catalyzed by the enzyme glutamate dehydrogenase and NADH is converted to NAD + in the presence of ammonia, as shown in eq . The amount of NADH consumed, as measured by the change in absorbance at 340 nm, is directly proportionate to the amount of ammonia present. , While the enzymatic method can provide improved sensitivity over the above-mentioned colorimetric methods, it is highly sensitive to pH and temperature. The optimum pH and temperature were suggested to be 8.0 and 20–25 °C, respectively. , …”
Section: Ammonia Detection Methods and Control Experimentsmentioning
confidence: 99%
“…Τοΰτο συμβαίνει επειδή είς χαμηλάς συγκεν τρώσεις υπεροξειδίου τοϋ υδρογόνου σχηματίζεται κυρίως μονοϋπεροξείδιον, ό σχηματισμός τοϋ οποίου είναι ανεξάρτητος της συγκεντρώσεως των ιόντων υδρογόνου (έξίσ. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Συγκρίνοντες τάς καμπύλας 1 καί 2 είς τό τμήμα της σταθεράς ταχύτητος αν τιδράσεως, παρατηροϋμεν ότι ή σχέσις των αρχικών ταχυτήτων εί ναι περίπου 2, ήτοι ώς ή σχέσις των συγκεντρώσεων υδρογόνου: (Η )ι/(Η ) 2 = 10χ10 -3 /5χ10 -3 = 2.…”
Section: μέθοδος σταθερού σήματοςunclassified
“…Ειδομεν ότι ή μή καταλυτική άντίδρασις χωρεί διά δύο ανεξαρτήτων οδών, ή δε τιμή τής σταθεράς ταχύτητος k 0 εξ αρτάται έκ τής συγκεντρώσεως των ιόντων υδρογόνου(έξισ. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”
Section: προσδιορισμός των σταθερών ταχύ τητος αντιδράσεωςunclassified
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