ALIPHATIC ALDEHYD ES: METHO D 2018, Issue 1, dated 15 March 2003 - page 6 of 10 the HPLC when the mobile phase consisted of 66:34 acetonitrile:water at 1.3 mL/m in. Retention times of valeraldehyde-DNPH and isovaleraldehyde-DNPH were 7.82 and 7.32 m in, respectively. Although two sharp peak s were observed, th e separatio n was only partial. This method can be used with SKC aldehyde samplers (DNPH-coated silica gel tubes, catalogue No. 226119) for aceta ldehyde, propionaldehyde, valeraldehyde, and isovaleraldehyde with modifications (see APP EN DIX ).
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NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
