PMID- 18967332
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20121002
LR  - 20190729
IS  - 0039-9140 (Print)
IS  - 0039-9140 (Linking)
VI  - 47
IP  - 2
DP  - 1998 Oct
TI  - Tensammetric determination of non-ionic surfactants combined with the BiAS 
      separation procedure Part 3. Determination in the presence of hydrocarbons.
PG  - 325-33
AB  - A method for the determination of non-ionic surfactants (NS) in the presence of 
      an excess of hydrocarbons is developed. The modified BiAS procedure combined with 
      the indirect tensammetric method (BiAS-ITM) is applied for this purpose. The 
      method consists of extraction of NS into ethyl acetate, precipitation of 
      ethoxylates with modified Dragendorff reagent, removal of adsorbed hydrocarbons 
      by washing with isooctane and the determination of NS in the dissolved 
      precipitate by the ITM. The method is characterised by 96-100% recovery and RSD 
      of 0.02-0.04 at a 1000-fold excess of hydrocarbons. The detection limit of the 
      procedure is 1.5 mug and the linear dynamic range is 2-20 mug in the sample, 
      which facilitates work within the range of 2-1000 mug through the use of 
      aliquots. The non-modified version of the BiAS-ITM exhibits a loss of NS due to 
      their extraction by droplets of residual hydrocarbons trapped in the precipitate. 
      Isooctane as a washing agent is found to be the best among eight tested media: 
      methanol, ethyl acetate, diisopropyl ether, chloroform, water, glacial acetic 
      acid, benzene and isooctane.
FAU - Wyrwas, B
AU  - Wyrwas B
AD  - Technical University of Poznan, Institute of Chemistry, PL-60965 Poznan, Poland.
FAU - Szymanski, A
AU  - Szymanski A
FAU - Lukaszewski, Z
AU  - Lukaszewski Z
LA  - eng
PT  - Journal Article
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
EDAT- 2008/10/31 09:00
MHDA- 2008/10/31 09:01
CRDT- 2008/10/31 09:00
PHST- 1997/04/18 00:00 [received]
PHST- 1998/03/06 00:00 [revised]
PHST- 1998/03/19 00:00 [accepted]
PHST- 2008/10/31 09:00 [pubmed]
PHST- 2008/10/31 09:01 [medline]
PHST- 2008/10/31 09:00 [entrez]
AID - S0039-9140(98)00131-3 [pii]
AID - 10.1016/s0039-9140(98)00131-3 [doi]
PST - ppublish
SO  - Talanta. 1998 Oct;47(2):325-33. doi: 10.1016/s0039-9140(98)00131-3.