BS 6068-2.49-1995 水质.第2部分:物理、化学和生物化学法.第49节:铝含量测定:邻苯二酚紫光谱测定法

标准号：BS 6068-2.49-1995
中文标准名称：水质.第2部分:物理、化学和生物化学法.第49节:铝含量测定:邻苯二酚紫光谱测定法
英文标准名称：Water quality - Physical, chemical and biochemical methods - Determination of aluminium - Spectrometric method using pyrocatechol violet
标准类型：Z16
发布日期：1995/7/15 12:00:00
实施日期：1995/7/15 12:00:00
中国标准分类号：Z16
国际标准分类号：13.060.50
适用范围：1 Type of sample The method is applicable to the analysis of potable waters, ground waters, and lightly polluted surface and sea waters. 2 Substance determined The method determines filterable (dissolved) and acid-soluble aluminium. 3 Range The method includes low range determination up to 100 μg/l Al with 50 mm cells and high range determi-nation up to 500 μg/l Al with 10 mm cells. The effec-tive range depends on the sensitivity of the spectrometer and can be extended upwards by taking smaller test portions. 4 Limit of detection The limit of detection is 2 μg/l when cells of optical path length 50 mm and a 25 ml test portion are used. 5 Sensitivity An aluminium concentration of 100 μg/l gives an absorbance of about 0,20 ± 0,05 optical absorption units, using a 25 ml test portion and cells of optical path length 10 mm. 6 Precision If not specified, the precision of volumes and masses mentioned in this International Standard is ± 1 % of the value.