Anions in non saline waters - Determination of Anions in Natural and Treated Waters - page 190

suitable as the detector for both bromide.
2.58.3 Micelle exclusion chromatography
Okada [375] carried out micelle exclusion chromatography on mixtures of iodide,
bromide, nitrite, nitrate and iodate.
2.59 Molybdate
2.59.1 Atomic absorption spectrometry
Vazquez-Gonzalez et al. [376] have described a method for preconcentrating and
determining molybdenum by electrothermal atomisation atomic absorption spectrometry
after preconcentration by means of anion exchange using Amberlite IRA-400 in resin
citrate form. The optimal analytical parameters were established by drying, carbonisation,
charring, atomisation and cleaning in a graphite furnace. The precision and accuracy of
the method were investigated. Less than 0.2µg L −1 molybdenum could be determined by
this procedure.
Samchuk [377] developed an atomic absorption method for the determination of
molybdenum in non saline waters, with preconcentration on carbon modified by
complex-forming organic reagents and on chelated sorbents. The methods for preparing
the modified carbons and chelated sorbents are described. The work was done on a two-
beam atomic absorption spectrometer with a graphite atomiser and deuterium background
corrector.
2.59.2 Preconcentration
The application of preconcentration techniques is discussed in sections 15.1.7 and
15.1.13.
2.60 Monochloroacetate
2.60.1 Ion chromatography
The application of this technique is discussed under multianion analysis in sections 12.2.4
and 12.2.5.
2.61 Monofluorophosphate
2.61.1 High performance liquid chromatography
Yoza et al. [378] applied this technique to the analysis of mixtures of orthophosphate,
monofluorophosphate and polyphosphates using a photodiode array detector.