Effect of photostability of mercury(II) dithizonate on photoacoustic spectroscopic determination of trace mercury

Kinetic‐Catalytic and Spectrophotometric Determination of Hg(II) Using its Catalytic Effect on Ligand Substitution Reaction between Hexacyanoferrate(II) and Pyrazine

“…The second term in the above equation explains the dependence in [Fe(CN) 6 4-] at its low and high concentrations as exhibited by the rate dependence study on [Fe(CN) 6 4-] as shown in (FIG.4). When the large excess of [Fe(CN) 6 4-] is used, the equation (1) can be transformed to equation (2). (2) Where k′ corresponds to an experimental rate constant for an uncatalyzed path and K 2 ′ is a term for catalyzed path composed of many terms derivable from mechanistic scheme 30 respectively.…”

“…When the large excess of [Fe(CN) 6 4-] is used, the equation (1) can be transformed to equation (2). (2) Where k′ corresponds to an experimental rate constant for an uncatalyzed path and K 2 ′ is a term for catalyzed path composed of many terms derivable from mechanistic scheme 30 respectively. It is to be noted that absorbance values, A t (measured at t=15, 20 and 25 min.)…”

Kinetic Determination of Mercury(II) at Trace Level from Its Catalytic Effect on a Ligand Substitution Process

“…Being toxic, it should be regularly monitored in a wide variety of samples such as air, water, soil, food, and human blood and urine. During the past decade, many new and improved methods for determination of mercury(II) have been developed and are listed in earlier reviews [1][2][3][4][5][6]. Many of these, however, lack sufficient sensitivity for determining mercury at subnanogram per milliliter levels.…”

“…techniques [2,7,8] are usually required prior to analysis, along with the disadvantage that a large volume of samples is required.…”