Ultrasound-assisted digestions

Vaisanen, A. and A. Hander. 2006. Optimization of operating conditions of axially and radially viewed plasmas for the determination of trace element concentrations form ultrasound-assisted digests of soil samples contaminated by lead pellets. Anal. Chim. Acta 570 93-100. 

Priego-Capote, F. and M.D. Luque de Castro. 2007. Ultrasound-assisted digestion A useful alternative in sample preparation. J. Biochem. Biophys. Meth. 70 299-310. 

Variables affecting ultrasound-assisted digestion in both baths and probes... 

Ultrasound-assisted digestion is strongly influenced by a number of variables however, most analytical chemists are unfamiliar with them and fail to optimize them and report their values. This is one of the main origins of poor precision and reproducibility in digestion procedures. 

Cadmium Plant Direct injection ETAAS 0.1-1.Opgr Online ultrasound-assisted digestion or acidified subcritical water (semiautomatic procedure)... 

Z.Q. Zhang, H.T. Yan, Y. Lin, Rapid determination of chemical oxygen demand by flame AAS based on flow injection on-line ultrasound-assisted digestion and manganese speciation separation. Atom. Spectrosc. 25 (2004) 191-196. 

A traditional ultrasound-assisted digestion was studied by one design, whereas a novel all-glass sonotrode was optimised using three experimental designs. 

C. Domini, L. Vidal, G. Cravotto, A. Canals, A simultaneous direct microwave/ultrasound-assisted digestion procedure for the determination of total Kjeldahl nitrogen, Ultrason. Sonochem. 16 (2009) 564r-569. 

C. Lima, F. Barbosa, J. Krug, Comparison of ultrasound-assisted extraction, slurry sampling and microwave-assisted digestion for cadmium, copper and lead, J. Anal. Atom Spectrom., 15 (2000), 995-1000. 

Some contradictory results are obtained in the comparison of results in the determination of arsenic after ultrasonic slurry sampling — the use of sampling is not most appropriate in this case as the sampling step is before the slurry formation — ultrasound-assisted extraction — leaching has been the correct word in this case — and microwave-assisted digestion [28], which will be treated in detail in Chapter 5. 

INFLUENCE OF ULTRASOUND ON SAMPLE DIGESTION 3.2.1. Effects involved in ultrasound-assisted sample digestion... 

Variables affecting ultrasound-assisted sample digestion... 

Ultrasound-assisted soft digestion (USASD) has been applied to a variety of sample and analyte types in widely diverse fields. This section discusses its implementation in the analytical process and its principal uses. Ultrasonic soft digestion has been used in connection with both organic and inorganic analytes. 

Ultrasound-assisted soft digestion has been used for other practical purposes from which analytical chemists can derive new applications. One case in point is in medicine, where ultrasound has been used as an adjunctive therapeutic treatment for clot dissolution of pharmacological thrombolysis. The combination of externally applied low-frequency high-intensity US with fibrinolytic therapy resulted in more rapid and complete reperfusion than the application of US or administration of fibrinolytic agents alone [42]. 

---