نتایج جستجو برای: graphite furnace
تعداد نتایج: 23760 فیلتر نتایج به سال:
Determinations of aluminum (Al) in serum are performed routinely by laboratories through customer-validated applications. Graphite furnace atomic absorption spectroscopy (GFAAS) is one of only a few routine techniques with a dynamic range sensitive enough to be used clinically in customervalidated applications to measure Al in serum. There are a few specific analytical challenges that an analys...
Purpose: To determine whether chromium, cadmium, and lead levels in human Fingernails reflected the exposure to workplace contamination in tanneries. Approach: 49 exposed tanning workers and 33 controls were monitored for fingernail levels of chromium, cadmium, and lead by graphite furnace and hydride atomic absorption spectroscopy. Results: The mean levels of fingernail chromium, cadmium, and ...
[1] Arsenic concentrations measured by graphite furnace atomic absorption range from < 5 to 900 mg/L in groundwater pumped from 6000 wells within a 25 km area of Bangladesh. The proportion of wells that exceed the Bangladesh standard for drinking water of 50 mg/L arsenic increases with depth from 25% between 8 and 10 m to 75% between 15 and 30 m, then declines gradually to less than 10% at 90 m...
Nineteen different varieties of local brand chocolates, soft candies and hard candies were procured from Tiruchirappalli district, Tamil Nadu. These samples were analyzed for two heavy metals nickel and arsenic in Graphite Furnace – Atomic Absorption Spectrophotometer (GF-AAS). Out of 19 local brands of chocolates and candies, five were chocolate type, six were soft candy type and eight were ha...
Large-quantity ~grams! one-dimensional ZnO nanowires of different sizes have been synthesized by a simple thermal evaporation of ZnO powder in a tube furnace at a temperature controlled to 1000– 1200 °C and pressure to 1–2 Torr air. A mixture of ZnO and graphite powder was used as the source. Fine graphite flakes were used to promote the growth. The graphite flakes are the key for large-quantit...
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