| 摘要 |
<p>A method of and apparatus for spectrophotometric analysis of a powder material by reflectance measurements of a near infrared beam has a sample cell (2) within which the powder (20A) is compressed between a spring biased plate (13) and a window (8) to a predetermined density. Spectrophotometric analysis is effected on the powder (20A) through the window (8) by scanning with the infrared beam over an area of the powder (20A) which when multiplied by the density of the powder and the depth of penetration of the beam is consistent with a predetermined dosage weight - such as that at which the powder may be marketed.</p> |
