A. Botha

发表

Quantification of Total Arsenic in South African Wheat Flour by High Resolution – Inductively Coupled Plasma – Mass Spectrometry (HR-ICP-MS)

Abayneh A. Ambushe, T. W. Godeto, Magadima Mary Thosago, 2021, Analytical Letters.

The importance and status of the micronutrient selenium in South Africa: a review

P. Nomngongo, J. Myburgh, A. Botha, 2021, Environmental Geochemistry and Health.

Final report on CCQM-P73: International comparison of nitrogen monoxide in nitrogen gas standards (30?70) ?mol/mol

S. Musil, Sang-Hyub Oh, G. Baptista, 2008 .

Isotope dilution ICP-MS analysis of trace elements in a Syenite rock reference material

J. Fischer, A. Botha, A. Barzev, 2007 .

A comparison of different calibration strategies for the trace analysis of soil samples by inductively coupled plasma mass spectrometry (ICP-MS)

A. Botha, 2020, Metrologia.

The importance and status of the micronutrient selenium in South Africa: a review

P. Nomngongo, J. Myburgh, A. Botha, 2021, Environmental Geochemistry and Health.

Report of the key comparison CCQM-K108 determination of arsenic species, total arsenic and cadmium in brown rice flour

Y. Tsoi, W. Juan, K. Inagaki, 2015 .

FTIR and GC as complementary tools for analysis of corrosive gases

A. Botha, N. Ntsasa, J. Tshilongo, 2009 .

The quantitative characterisation of geological reference materials by isotope dilution inductively coupled plasma mass spectrometry (ICP-MS)

A. Botha, 2010 .

The new International Standard ISO 17034: general requirements for the competence of reference material producers

Hendrik Emons, Stefanie Trapmann, Angelique Botha, 2017, Accreditation and Quality Assurance.

A case study for the provision of measurement traceability and measurement uncertainty for the South African reference materials

J. Fischer, A. Botha, S. M. Linsky, 2005 .

Quantification of Arsenic Species in Wheat Flour Samples by Ion Chromatography Coupled to High Resolution Inductively Coupled Plasma-Mass Spectrometry (IC-HR-ICP-MS)

T. W. Godeto, Magadima Mary Thosago, A. Botha, 2022, Analytical Letters.

Towards the simultaneous detection of the low nmol/mol range of CO, CH4 and CO2 in nitrogen using GC-FID

M. J. V. Rensburg, A. Botha, N. Ntsasa, 2009 .

International comparison CCQM-K111—propane in nitrogen

G. Rhoderick, C. Liaskos, P. Brewer, 2017 .

International comparison CCQM-K51: Carbon monoxide (CO) in nitrogen (5 µmol mol−1)

P. Gupta, M. Gerboles, S. Musil, 2010 .

KEY COMPARISON: International comparison CCQM-K52: Carbon dioxide in synthetic air

P. Gupta, R. Langenfelds, S. Musil, 2008 .

Report on the 36th meeting of ISO/REMCO

Hendrik Emons, Angelique Botha, John Hammond, 2009, Accreditation and Quality Assurance.