Tube cell for atomic absorption spectrophotometry.

摘要

A tube cell (21) for flameless atomic absorption spectrophotometry has a transverse cross-section such that the portion (23) above a line (25) extending longitudinally midway between the top and bottom of the tube has a smaller area than the portion (24) below that line. The tube cell has an elongate aperture (26) formed close to the bottom (28) of the tube cell for insertion of a probe (29) or a platform (not shown) which carries a sample to be analysed. The cross-section of the tube is shaped to maximise the size of prove which can be used, and hence the sample volume, while keeping the total cross-sectional area to a minimum to obtain maximum chemical sensitivity.

A numbei of differently shaped cross-sections are described and illustrated in addition to the triangular cross-section shown in Figures 5 and 6.