On-line purge-and-trap-gas chromatography with flame ionization detection as an alternative analytical method for dimethyl sulphide trace release from marine algae.
The release of dimethyl sulphide (DMS) by the seaweed Ulva spp at trace level was studied in aqueous solutions at different salinities, temperature and light intensities. For this purpose, the purge-and-trap technique combined with gas chromatography-flame ionization detection was used. The analytical method was evaluated in terms of linearity range, limit of detection, precision and accuracy by considering 10@1000 (w/v) and 30@1000 (w/v) synthetic seawater as aqueous matrices. Calculation of the recovery function evidenced a matrix influence. The method of standard addition was then used for an accurate determination of DMS in synthetic seawater reproducing the matrix effect. DMS fluxes were analysed in batch cultures of Ulva spp reproducing the conditions which usually occur in the Sacca di Goro lagoon (Northern Adriatic Sea, Italy).
Careri
M
M
Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica e Chimica Fisica, Università degli Studi di Parma, Parco Area delle Scienze 17A, 43100 Parma, Italy.
Musci
M
M
Bianchi
F
F
Mucchino
C
C
Azzoni
R
R
Viaroli
P
P
D000460:Chlorophyta / Q000737:chemistry*; D002849:Chromatography, Gas / Q000379:methods*; D004784:Environmental Monitoring; D005410:Flame Ionization; D008027:Light; D013440:Sulfides / Q000032:analysis*; D013696:Temperature; D014835:Volatilization
D013440:Sulfides; C004784:dimethyl sulfide