Determination of boron in iron- and nickel-based alloys by graphite furnace atomic absorption spectrometry with a zirconium—nickel chemical modifier and a zirconium-pretreated graphite tube

✍ Scribed by Yongming Liu; Benling Gong; Yuli Xu; Zhuanhe Li; Tiezheng Lin

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 320 KB
• Volume: 292
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(94)00036-0

✦ Synopsis

A chemical modifier composed of nickel and zirconium salts and treatment of the graphite tube with zirconium solution were studied for the determination of boron in cast iron, Fe-, Ni-and Fe-Ni-based alloys. A combination of 3000 mg 1-l nickel and 1000 mg I-' zirconium as chemical modifier and soaking the graphite tube in 10 g I-' zirconium solution gave the highest analytical sensitivity. The interference effects of a major component (iron) and eight minor components (Cr, W, Nb, Ta, MO, Ti, Al and Mn) were studied.The relative standard deviation for the determination of 0.013% of boron in a nickel-based alloy was 5.6% (n = 8). The characteristic mass was 500 pg per 0.0044 absorbance.