Turbidimetric analysis

Turbidimetric analysis is a valuable technique for determining the temperature dependence of the conformational transition of the microgel dispersions and is performed using UV-visible spectroscopy [51, 52]. It is also used to monitor the effect of pH, concentration, hydrophobic and hydrophilic content of the microgel on the turbidity of the dispersion [ 53 ]. 

---

The following results were obtained for the turbidimetric analysis of a set of standard S04 solutions using the procedure described earlier... 

Turbidimetric analysis determinations by, 729 general discussion on, 726 instruments for, 727 Turbidity method for D. of silver, 347 Tyndall effect 419, 726... 

Measurement of the intensity of the transmitted light as a function of the concentration of the dispersed phase is the basis of turbidimetric analysis and measurement of the intensity of the scattered light (at right angles to the direction of incident light) as a function of the concentration of dispersed phase constitute the basis of nephelometric analysis. 

Isomorphous replacement occurs when different ions yield slightly soluble crystals in a geometric form similar to the analyte. The interferent ion substitutes the analyte in the crystalline structure, forming a mix of precipitates and consequently causes error in the turbidimetric analysis. 

E. Rodenas-Torralba, A. Morales-Rubio, A.F. Lavorante, B.F. Reis, M. de la Guardia, Micropumping multicommutation turbidimetric analysis of waters, Talanta 73 (2007) 742. 

Other cavities mainly targeted as drug-delivery vehicles, have been exploited. Cucurbituril-based (CB) carbohydrate clusters (carbohydrate wheels) were synthesized by photoreaction of allyloxylated CB-6 with acetylthioglycosides. Twelve glucosyl, galactosyl and mannosyl residues (4 equivalents per reactive site, 2 days in MeOH) were introduced in 77, 76, and 83% yield, respectively, and finally deacetylated [71] (Fig. 17). The mannosylated CB cluster s affinity to ConA was examined by turbidimetric analysis. A 1,100-fold excess amount of methylman-noside had to be added to obtain a transparent solution as consequence of complete disruption of the cross-linking interaction. 

J. F. van Staden, Flow-Injection Turbidimetric Analysis of Sulfate in Water [in Afrikaans]. Water SA, 12 (1986) 43. 

The test is based on the opalescence formed when potassium precipitates with the anionic reagent tetraphenylborate (Figure 6.11.1). This reagent has found widespread use in the determination of potassium by gravimetric, titrimetric, and as in the case of the pharmacopoeial limit test, turbidimetric analysis. 

Pinazo, A., X. Domingo, Turbidimetric analysis of amine oxides and amine oxide-anionic surfactant mixtures, J. Am. Oil Chem. Soc., 1996, 73,143-147. 

---