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Alizarin reagent

Weigh approximately 15 mL of seawater into a 25-mL volumetric flask. Add 8.0 mL of the combined alizarin reagent, dilute to volume, and mix well. When diluted to volume, the solution should have a pH of 4.50 + 0.02. [Pg.249]

To compensate for the salt error, calibrate the method as described in Section 11.2.8.3 using the artificial seawater. To ISmL aliquots add 0.5,1.0,1.5 and 2.0 mL of the fluoride working standard and 8.0 mL of the alizarin reagent. For seawater samples with different chlorinities, prepare individual calibration curves with chlorinities of 0,5,10,15 and 20 %o. [Pg.250]

Fbiorine. Acidify a portion of the filtrate from the sodium fusion with dilute hydrochloric add and treat with drops of the zirconium-alizarin reagent (page 223). The presence of fluoride ion is indicated by a fading of the violet colour of the reagent to the... [Pg.24]

Zirconium-Alizarin Reagent (for fluoride from sodium fusion). De Boer, Chem. Weekblad, 21, 404 (1924). [Pg.224]

See other pages where Alizarin reagent is mentioned: [Pg.143]    [Pg.144]    [Pg.145]    [Pg.146]    [Pg.476]    [Pg.80]    [Pg.81]    [Pg.574]    [Pg.575]    [Pg.725]    [Pg.253]    [Pg.503]    [Pg.79]    [Pg.80]    [Pg.81]    [Pg.120]   
See also in sourсe #XX -- [ Pg.143 ]



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Alizarin

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