EMAIL THIS PAGE TO A FRIEND

Analytica chimica acta

The importance of chain length for the polyphosphate enhancement of acidic potassium permanganate chemiluminescence.


PMID 25127649

Abstract

Sodium polyphosphate is commonly used to enhance chemiluminescence reactions with acidic potassium permanganate through a dual enhancement mechanism, but commercially available polyphosphates vary greatly in composition. We have examined the influence of polyphosphate composition and concentration on both the dual enhancement mechanism of chemiluminescence intensity and the stability of the reagent under analytically useful conditions. The average chain length (n) provides a convenient characterisation, but materials with similar values can exhibit markedly different distributions of phosphate oligomers. There is a minimum polyphosphate chain length (∼6) required for a large enhancement of the emission intensity, but no further advantage was obtained using polyphosphate materials with much longer average chain lengths. Providing there is a sufficient average chain length, the optimum concentration of polyphosphate is dependent on the analyte and in some cases, may be lower than the quantities previously used in routine detection. However, the concentration of polyphosphate should not be lowered in permanganate reagents that have been partially reduced to form high concentrations of the key manganese(III) co-reactant, as this intermediate needs to be stabilised to prevent formation of insoluble manganese(IV).

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

442840
4,4′-Isopropylidenediphenol, analytical standard
C15H16O2
239658
Bisphenol A, ≥99%
C15H16O2
42088
Bisphenol A, certified reference material, TraceCERT®
C15H16O2
133027
Bisphenol A, 97%
C15H16O2
431419
Phosphorus pentoxide, ≥99.99% trace metals basis
O5P2
79609
Phosphorus pentoxide, puriss. p.a., ACS reagent, ≥98.0% (T)
O5P2
79610
Phosphorus pentoxide, desiccant, with moisture indicator
O5P2
298220
Phosphorus pentoxide, powder, ACS reagent, ≥98.0%
O5P2
214701
Phosphorus pentoxide, ReagentPlus®, 99%
O5P2
P1088
Potassium hydrogen phthalate, BioXtra, ≥99.95%
C8H5KO4
60359
Potassium phthalate monobasic, BioUltra, ≥99.5% (T)
C8H5KO4
P6758
Potassium phthalate monobasic, ≥99%
C8H5KO4
14659
Potassium phthalate monobasic, Standard for quantitative NMR, TraceCERT®
C8H5KO4
60360
Potassium phthalate monobasic, puriss. p.a., ≥99.5% (T)
C8H5KO4
33325
Potassium phthalate monobasic, puriss. p.a., buffer substance, ≥99.5%
C8H5KO4
60357
Potassium phthalate monobasic, certified reference material for titrimetry, certified by BAM, according to ISO 17025, ≥99.5%
C8H5KO4
179922
Potassium phthalate monobasic, ACS reagent, acidimetric standard
C8H5KO4
71496
Sodium phosphate monobasic, purum p.a., anhydrous, ≥99.0% (T)
H2NaO4P
S7026
Sodium thiosulfate
Na2O3S2
563188
Sodium thiosulfate, ≥99.99% trace metals basis
Na2O3S2
HT1005
Sodium thiosulfate solution, 2 g/dL in deionized water
Na2O3S2
T5508
Trisodium trimetaphosphate, ≥95%
Na3O9P3