AA-1800 Atomic Absorption Spectrometer for the Determination of Lead, Cadmium, Arsenic, Mercury and Copper in Salvia Miltiorrhiza - Master's thesis - Dissertation

Determination of Lead, Cadmium, Arsenic, Mercury and Copper in Radix Salviae Miltiorrhizae by AA-1800 Atomic Absorption Spectrometry

Keywords: Atomic Absorption Spectrophotometry; Salvia Miltiorrhiza; Heavy Metals; Aesthetic Instrument; AA-1800 With the growing international recognition of traditional Chinese medicine, its therapeutic benefits are increasingly acknowledged worldwide. However, concerns about adverse effects have also risen, particularly regarding heavy metal contamination. Excessive levels of heavy metals like lead, cadmium, arsenic, mercury, and copper can cause serious health issues when present in medicinal herbs. This study utilized AA-1800 atomic absorption spectrometry to determine the levels of these metals in different samples of Salvia miltiorrhiza (Danshen), following the guidelines from the Chinese Pharmacopoeia. The goal was to provide a reference for quality control and standardization of this important herbal medicine. The instruments used included the AA-1800 atomic absorption spectrophotometer, along with appropriate reagents such as nitric acid, perchloric acid, hydrochloric acid, and concentrated sulfuric acid. Standard solutions for each element were prepared, and the absorbance values were plotted against concentration to create calibration curves. Results showed that while arsenic and mercury levels were relatively low across all samples, lead and cadmium exceeded recommended limits in several cases. Copper content was also found to be above acceptable thresholds in some samples. These findings highlight the importance of monitoring and controlling heavy metal content in traditional medicines to ensure safety and quality. Proper sample preparation methods, including wet digestion, were employed to minimize loss of volatile elements. The use of electric heating sleeves helped streamline the process and improve efficiency. Overall, the study emphasizes the need for stricter quality assurance measures in the production and processing of herbal materials to meet global standards.

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