[Determination of trace Rh in organic residue by flame atomic absorption spectrophotometry].
The catalytic organic residue contained Rh was digested with HNO3 at 130 degrees C for 12 h. Trace noble metal Rh in catalytic organic residue was determined by flame atomic absorption spectrophotometry. Rh was atomized by air-acetylene flame at lamp Current of 7 mA. The methods of sample pretreatment for Rh in residue were compared in this paper. The recovery rates of this method were 95.3%-105.5% and the relative standard derivation was 0.9%. The method was applied to the analysis of some practical samples and the results obtained were satisfactory.
Han
Mei
M
Basic Experiment Center of Chemistry, Dalian University of Technology, Dalian 116024, China.
Cheng
Fang
F
Gu
Shi-fang
SF
Cui
Li-jun
LJ
Xiao
Guang
G
Xu
Song-yun
SY
D000114:Acetylene; D002384:Catalysis; D009930:Organic Chemicals / Q000032:analysis* / Q000737:chemistry; D012238:Rhodium / Q000032:analysis*; D012680:Sensitivity and Specificity; D013054:Spectrophotometry, Atomic / Q000379:methods
D009930:Organic Chemicals; D012238:Rhodium; D000114:Acetylene