Phenolphthalein – inhalable fraction. Determination method in workplace air
Journal Title: Podstawy i Metody Oceny Środowiska Pracy - Year 2018, Vol 34, Issue 3
Abstract
Phenolphthalein at room temperature is present in a form of solid, odorless, white or yellowish crystals. It is commonly used in analytical laboratories as a pH indicator. It is also used to determine the depth of concrete carbonation or for metal surface preparation in galvanizing and powder painting processes. Exposure to phenolphthalein can cause skin irritation. In the European Union, phenolphthalein has been classified as carcinogenic category 1.B and mutagenic category 2. It is also suspected to have a negative effect on human fertility. The aim of this study was to develop and validate a sensitive method for determining phenolphthalein concentrations in the workplace air in the range from 1/10 to 2 MAC values, in accordance with the requirements of Standard No. PN-EN 482. The study was performed using a liquid chromatograph with spectrophotometric detection. All chromatographic analysis were performed with Supelcosil LC 18 150 × 3 mm analytical column, which was eluted with mixture of methanol, water and acetic acid. The method is based on the collection of phenolphthalein on glass fiber filter, extraction with methanol, water and acetic acid mixture, and chromatographic determination of resulted solution with HPLC technique. The average extraction efficiency of phenolphthalein from filters was 99.9%. The method is linear (r = 0.9997) within the investigated working range 0.008–0.4 mg/ml (0.33–16.7 mg/m3 for a 240-L air sample). Calculated limit of detection (LOD) and limit of quantification (LOQ) were 0.33 μg/ml and 0.99 μg/ml, respectively. The analytical method described in this paper enables determination of phenolphthalein in workplace air. The method is precise, accurate and it meets the criteria for procedures for measuring chemical agents listed in Standard No. PN-EN 482+A1:2016-01. The method can be used for assessing occupational exposure to phenolphthalein and associated risk to workers’ health. The developed method of determining phenolphthalein has been recorded as an analytical procedure (see appendix).<br/><br/>
Authors and Affiliations
Marzena Bonczarowska, Karolina Mikołajewska, Sławomir Brzeźnicki
Keywords
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- EP ID EP382652
- DOI 10.5604/01.3001.0012.4754
- Views 100
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