Between 1999 and 2005, a Task Force composed of CORESTA members has studied the existing methodologies for the determination of the Tobacco Specific Nitrosamines (TSNAs) in the mainstream smoke of cigarettes. Several methods have been proposed for this determination, which are mainly based on two types of analytical methodologies: GC-TEA (Gas Chromatography with a Thermal Energy Analyser as det...

Since chemical methods so far proposed for vitamins D determination commonly suffer from coexistence of interfering substances and hence from requirement of designing tedious purifica tion steps, a more simple analytical procedure without such pre-treatment has been strongly desired. During the course of our study on a gas-liquid chromatographic determination of vitamins D (1), efforts were als...

The recent literature on the determination of minimum energy conformations by ab initio quantum mechanical techniques is reviewed. The availability of computer-coded analytical first and second derivatives of the Hartree-Fock energy makes possible calculations that will be of significant assistance in structure determination of molecules. A short review of recent progress in empirical energy mi...

An analytical method was developed for Ca determination in ultrapure water, concentrated acids and hydrogen peroxide by ICP-MS, using CH3F as reaction gas in the dynamic reaction cell (DRC) and isotopic dilution (ID) as strategy of calibration for improve the accuracy and allow interferencefree Ca determination.

tropicamide is an antimuscarinic agent used as eye drops for refractive examinations. the aim of this study was to develop a simple and suitable analytical method for determination of tropicamide in eye drops in the presence of excipients. a zero-crossing third and fourth derivative spectrophotometric method was described for determination of tropicamide in eye drops. the measurements were carr...

Perfluoroalkyl substances (PFASs) are proliferated into the environment on a global scale and present in the organisms of animals and humans even in remote locations. Persistent organic pollutants of that kind therefore have stimulated substantial improvement in analytical methods. The aim of this review is to present recent achievements in PFASs determination in various matrices with different...

Anthropogenic emission of platinum group elements (PGEs) from the abrasion of automotive catalytic converters into the environment has significantly increased. However, the concentration level of these PGEs (i.e. Pd, Pt, Rh) is still very low in the nature. Accordingly, their determination and speciation in various environmental compartments appears to be a challenging task for analytical chemi...

Glucose oxidase (EC 1.1.3.4) is the most widely employed enzyme as analytical reagent. This is the result of (1) its utility in the determination of glucose, an analyte of wide analytical interest, and (2) its relatively low cost and good stability that make the glucose/glucose oxidase system a very convenient model for method development (particularly in the area of biosensors). This review di...

Analytical procedure for determination of glyceroltriheptanoate (GTH) in processed animal by-products was developed. Samples of meat and bone meal were sieved through 1 mm sieve, extracted with petroleum ether, and cleaned up on amino bonded solid phase extraction cartridges. Extracts were analysed with a gas chromatograph combined with flame ionisation detector, on DB5 capillary column (30 m, ...