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Gravimetric analysis describes a set of methods used in analytical chemistry for the quantitative determination of an analyte (the ion being analyzed) based on its mass. The principle of this type of analysis is that once an ion's mass has been determined as a unique compound, that known measurement can then be used to determine the same analyte's mass in a mixture, as long as the relative ...
This is a common laboratory test to determine if sulfate anions are present. The sulfate ion can act as a ligand attaching either by one oxygen (monodentate) or by two oxygens as either a chelate or a bridge. [7] An example is the complex Co 2 (SO 4)] + Br − [7] or the neutral metal complex PtSO 4 (PPh 3) 2] where the sulfate ion is acting as ...
An alternative method for sulfate treatment is with solid ammonium sulfate salt or aqueous solutions thereof. These materials are introduced inside the container after forming and decompose into gases in the annealing lehr, where the resulting sulfur-containing gas mixture carries out the dealkalization reaction.
Pyrite (iron disulfide, FeS 2) was heated in air to yield iron(II) sulfate, FeSO 4, which was oxidized by further heating in air to form iron(III) sulfate, Fe 2 (SO 4) 3, which, when heated to 480 °C, decomposed to iron(III) oxide and sulfur trioxide, which could be passed through water to yield sulfuric acid in any concentration. However, the ...
Its solutions react with sulfate ion to produce a thick white solid precipitate of barium sulfate. BaCl 2 + Na 2 SO 4 → 2 NaCl + BaSO 4. This precipitation reaction is used in chlor-alkali plants to control the sulfate concentration in the feed brine for electrolysis. Oxalate effects a similar reaction: BaCl 2 + Na 2 C 2 O 4 → 2 NaCl + BaC ...
Barium sulfate produced in this way is often called blanc fixe, which is French for "permanent white". Blanc fixe is the form of barium encountered in consumer products, such as paints. [5] In the laboratory barium sulfate is generated by combining solutions of barium ions and sulfate salts.
This development allowed for testing the solubility of salts and hydrogen ion concentration, as well as acid/base and redox titrations. Conductometry was further improved with the development of the glass electrode, which began in 1909. [3] [4]
Ion suppression in LC-MS and LC-MS/MS refers to reduced detector response, or signal:noise as a manifested effect of competition for ionisation efficiency in the ionisation source, between the analyte(s) of interest and other endogenous or exogenous (e.g. plasticisers extracted from plastic tubes, [1] mobile phase additives) species which have not been removed from the sample matrix during ...