1.1 This guide describes analytical methods for determining formaldehyde concentrations in air. 1.2 The guide is primarily focused on formaldehyde measurement technologies applicable to indoor (including in vehicle and workplace) air and associated environments that is, chambers or bags or both used for formaldehyde emission testing). The described technologies may be applicable to other environments (ambient outdoor). 1.3 This guide reviews a range of commercially available technologies that can be used to measure indoor air formaldehyde concentrations. These technologies typically can measure airborne formaldehyde concentrations with detection limits in the range of 0.04 ppbv (0.05 ug m-3) to 10 ppbv (12 ug m-3). The described technologies are typically applied to research or regulatory applications and not consumer level uses. 1.4 This guide describes the principles behind each method and their advantages and limitations. 1.5 This guide does not attempt to differentiate between the effectiveness of the methods nor determine equivalence of the methods. 1.6 Units--The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.7. his standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to its use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Keywordsformaldehyde; quantification; advantages; limitations; chromotropic acid; derivatization (DNPH, 2,4-Dinitrophenylhydrazine); derivatization (Hantzsch Reaction); electrochemical cell; preconcentration and thermal desorption; photoacoustic; cavity ringdown; FTIR spectrometer with optical filter; chemical ionization mass spectrometer; laser absorption spectrometer
This guide reviews the range of techniques that can be used to analyze formaldehyde concentrations in indoor air. Traditionally, indoor formaldehyde concentrations in ASTM International test methods have been quantified using the chromotropic acid method. However, there are a range of techniques that have been developed to determine formaldehyde concentrations since these methods were written. These techniques can be time-averaging methods or real-time methods. Some involve the use of wet chemicals for reactions or extractions. Other methods rely on how the formaldehyde molecules respond to differing energy inputs. The purpose of this guide is to examine the range of methods that can be used and describe the advantages and limitations of each method.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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