potassium-borohydride and sulfuric-acid

A method is reported for the determination of trace bismuth in traditional chinese medicine by hydride generation atomic fluorescence spectrometry. The effect of different means of digestion, the medium amounts of acid and reducing agent on the determination of Bi is investigated. In the given conditions, the linear range of determination is 0.1-200 microg x L(-1), and the detection limit is 0.0946 microg x L(-1). The instrumental relative standard deviation is about 0.55% and the recovery is about 94%-107%. The method is accurate, rapid and convenient with satisfactory results.

Topics: Bismuth; Borohydrides; Drugs, Chinese Herbal; Hydrochloric Acid; Hydrogen Peroxide; Hydrogen-Ion Concentration; Medicine, Chinese Traditional; Nitric Acid; Reproducibility of Results; Spectrometry, Fluorescence; Sulfuric Acids

The Se content in Trionyx triunguis was studied by atom fluorescence photometer with wet digestion. The recovery of the method is 96.2%-103.0%, relative standard deviation is 3.69%, the determined value of national standard substance pork are agree with standard value; and the method is simple, convenient, fast with good accuracy and precision. The results showed that Se in Trionyx triunguis was very rich, more 1.2-9.4 than Se contant in animal meal, more ten to hundred then it in refresh vegetables and fruits. These results provide a useful scientific base for making and exploiting healtyful foods with Se trionyx triunguis.

Topics: Animals; Borohydrides; Cadmium; Calcium; Hydrochloric Acid; Meat; Nitric Acid; Potassium; Reference Standards; Reproducibility of Results; Selenium; Sodium; Spectrometry, Fluorescence; Sulfuric Acids; Swine; Turtles; Zinc