Determination of boron at trace levels in rocks by inductively coupled plasma spectrometry

Boron Mass Fractions and δ11B Values of Eighteen International Geological Reference Materials

“…1984, Higgins 1984, Anderson et al . 1985, Walsh 1985) except the three highest values in Gladney et al . (1991).…”

“…This discrepancy may be caused by experimental errors introduced by chemical treatment because serpentinite rocks are very difficult to dissolve. For PCC-1, the mean mass fraction of 1.70 μg g -1 reported by Govindaraju (1994) was compiled from the reported values (Gordon et al 1979, Gladney et al 1984, Higgins 1984, Anderson et al 1985, Walsh 1985 except the three highest values in Gladney et al (1991). Other three values were 4.69 AE 0.33 μg g -1 (Mortier et al 1982), 6.0 μg g -1 (Thompson et al 1970) and 12.8 μg g -1 [published data in Flanagan (1969)], respectively.…”

Determination of trace levels of boron in graphite powder by inductively coupled plasma-optical emission spectrometry (ICP-OES)

“…Na 2 CO 3 fusion is the standard digestion method for the determination of boron in various matrices. [13][14][15][16] The optimum amount of Na 2 CO 3 required to dissolve the sample and to prevent the loss of boron varies in the range of 10 to 40 times that of the sample weight, which depends upon the concentration of boron and the nature of the sample. [13][14][15][16] In the case of low density samples like graphite powder, a high amount of ux is required to mix and to cover the graphite powder.…”

“…[13][14][15][16] The optimum amount of Na 2 CO 3 required to dissolve the sample and to prevent the loss of boron varies in the range of 10 to 40 times that of the sample weight, which depends upon the concentration of boron and the nature of the sample. [13][14][15][16] In the case of low density samples like graphite powder, a high amount of ux is required to mix and to cover the graphite powder. Various types of alkaline ux were used for the dissolution of graphite powder and the optimum amount of ux required was found to be 16 times the weight of the graphite powder.…”

Development of Oxidative Pyrolysis Method for the Rapid Determination of Boron in Graphite Powders by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)

“…For the analysis of chemically resistant materials such as graphite, extreme sample pre-treatments are required due to their complex and refractory nature (21)(22)(23)(24)(25)(26)(27). Microwave decomposition and fusion using Na 2 CO 3 /NaHCO 3 or Ba(OH) 2 are the two standard sample preparation methods used for the determi-…”