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Measurement of the properties of light, especially luminous intensity.

pho′to·met′ric (fō′tə-mĕt′rĭk), pho′to·met′ri·cal (-rĭ-kəl) adj.
pho′to·met′ri·cal·ly adv.
pho·tom′e·trist n.
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Adj.1.photometrical - of or relating to photometry
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In the above-described photometrical testing systems, the overall content of phytosterols in the classical TCM pollen preparation QKPT was determined as 2.
For preparation of filtrate (after adsorption) and photometrical estimation of concentration of lead ions and copper ions in it we used a standard procedure with usage of photocolorimeter CPC (concentration photoelectric colorimeter) -3-01 and spectrophotometer Spekord --50.