Costa U, Bruni M, Cimini F
Servizio Chimico di Porto, Livorno.
Med Lav. 1997 Nov-Dec;88(6):507-16.
Identification of asbestos in many different kinds of bulk materials was performed by means of optical microscopy and the results are reported in the present paper. Some hundreds of various samples taken aboard ships were analysed: panels, laggings, spray insulations, etc. These analyses were required to be not only reliable but also rapid. The results demonstrated the high reliability as well as the rapidity of the technique. Using both the well-known dispersion staining technique (with central stop objectives or with dark field condensers) and phase-contrast analyses on the same polarizing microscope, we carried out numerous checks on the optical properties of the fibres. Not only were dispersion staining colours detected but also refractive index, elongation and extinction signs, in order to obtain an absolutely certain identification. The Italian laws which deal with the asbestos detection discourage the use of the optical microscope because of its presumed unreliability. This paper tends to demonstrate that Italian laws underestimate the potential of the optical microscope. Optical microscopy is probably the only technique that is reliable, inexpensive and rapid at the same time.
通过光学显微镜对许多不同种类的散装材料中的石棉进行了鉴定，结果在本文中报告。对船上采集的数百个各种样本进行了分析：面板、保温层、喷涂绝缘材料等。这些分析不仅需要可靠，而且需要快速。结果证明了该技术的高可靠性和快速性。在同一偏光显微镜上同时使用著名的色散染色技术（使用中心光阑物镜或暗场聚光镜）和相差分析，我们对纤维的光学性质进行了大量检查。不仅检测到了色散染色颜色，还检测到了折射率、伸长率和消光符号，以获得绝对确定的鉴定。意大利处理石棉检测的法律由于其假定的不可靠性而不鼓励使用光学显微镜。本文倾向于证明意大利法律低估了光学显微镜的潜力。光学显微镜可能是唯一同时可靠、廉价且快速的技术。
