Table 1 Water quality parameters, analytical methods and detection limits Parameters Method References Detection limits Calcium, sodium, magnesium, potassium Atomic emission ICP NF EN ISO 11885 100 µg L−1 Bicarbonates Titrimetry NF EN ISO 9963-1 8 mg L−1 Chlorides Ionic chromatography NF EN ISO 10304 2 100 µg L−1 Nitrates, sulfates Ionic chromatography NF EN ISO 10304-1 100 µg L−1.
All techniques (body potassium, dual emission X-ray absorptiometry, body water, body density, body impedance, in vitro neutron activation analysis (IVNAA)) make assumptions about the relationship between the various body compartments and what is being measured (Burkinshaw, 1990).
Dissolved calcium, magnesium, silica, and sodium were measured with an inductively coupled plasma-atomic emission spectrometer, dissolved potassium was measured using an atomic absorption spectrophotometer, and fluoride, chloride, nitrate, and sulfate anions were determined using ion chromatography.
A sampling rate of 18 samples h−1 for both determinations was attained, their precisions and accuracies being statistically indistinguishable from those achieved by atomic emission spectroscopy (for potassium determination) and by a conventional batch potentiometry (for total fluoride determination) adopted as reference techniques.
Biomass burning and vehicular emissions (non-sea-potassium, non-sea-sulphate, non-sea-chloride, nitrate) were the major sources for fine mode local and continental aerosols whereas dust particles (non-sea-calcium and magnesium) were the major source for coarse mode local and continental aerosols.
Sodium (Na+) and potassium (K+) were analysed using flame emission photometer (Sherwood model 420), magnesium (Mg2+) and calcium (Ca2+) using Varian AA240 Fast Sequential Atomic Absorption Spectrometer.
Potassium was determined using a Flame Emission (Micronal, Model B462); pH and EC were measured using a benchtop pH and EC meter.
Calcium (Ca), magnesium (Mg), iron (Fe), and zinc (Zn) were analyzed by flame atomic absorption spectrometry (FAAS), while sodium (Na) and potassium (K) were analyzed by flame emission spectrometry (FAES).
Sodium and potassium ions were analysed employing the flame emission photometric method using Gallenkamp digital flame analyser (Loughborough, England).
2) Figure 1C: It would be highly useful to see changes in emission ratio after addition of potassium chlorate (not just chloride) since chlorate is a proven substrate analog for CHL1.
