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Prohexadione-calcium

The residue definition is for the parent, prohexadione-calcium, only. [Pg.532]

Prohexadione-calcium in the samples is extracted with acidic acetone by shaking (extracted as the free acid, prohexadione). The extract is purified by a series of... [Pg.532]

Prohexadione-calcium, analytical grade (Ihara Chemical Industries Co., Ltd)... [Pg.534]

Prohexadione-calcium standard solutions Dissolve 10 mg of prohexadione-calcium in 100mL of water to prepare a lOOmgL" solution. Transfer 100 p.L of this solution into a 30-mL test-tube, evaporate water to dryness under reduced pressure and to methylate prohexadione-calcium according to Section 6.3. Dissolve the product in acetonitrile to prepare the 0.05,0.2,0.4,0.6 and 0.8 mgL acetonitrile solutions. [Pg.534]

The residue R, expressed in mg kg prohexadione-calcium, is calculated from the following equation ... [Pg.537]

Wa = amount of prohexadione calcium for Vi read from calibration curve (ng)... [Pg.538]

Since prohexadione-calcium degrades rapidly in soil, soil samples should be analyzed or frozen immediately after sampling. ... [Pg.538]

The extraction method for prohexadione-calcium in soil was developed using alluvial soil and volcanic ash soil. Extraction by shaking the soil with a mixture of 1N sulfuric acid-acetonitrile (1 3, v/v) and/or of 1N sulfuric acid-acetone (1 3, v/v) showed an acceptable extraction recovery efficiency. [Pg.538]

Prohexadione-calcium degrades in aqueous sodium hypochlorite solution. [Pg.538]

Prohexadione-calcium at the level of 0.08 mg kg in tap water degrades and disappears rapidly. Degradation of prohexadione-calcium can be prevented by addition of ascorbic acid at about 1 mg kg in tap water. Degradation products of prohexadione-calcium by aqueous chlorination are identified by mass spectrometry. [Pg.538]

Sample storage stability Prohexadione-calcium in strawberry, rice grain, rice straw, wheat grain and barley grain is stable at -20 °C for 40, 140, 60, 80 and 100 days, respectively. Approximately 88% of the applied prohexadione-calcium remained in soil when stored at —20 °C after 80 days. [Pg.538]

M. Ikeda, Y. Asano, and Y. Yusa, Degradation of prohexadione-calcium by aqueous chlorination, in Abstracts of the 20th Annual Meeting of the Pesticide Science Society of Japan, p. 152 (1995). [Pg.539]

See other pages where Prohexadione-calcium is mentioned: [Pg.17]    [Pg.532]    [Pg.532]    [Pg.533]    [Pg.533]    [Pg.534]    [Pg.535]    [Pg.535]    [Pg.537]    [Pg.537]    [Pg.537]    [Pg.539]    [Pg.764]    [Pg.1285]    [Pg.427]    [Pg.1252]   
See also in sourсe #XX -- [ Pg.532 ]



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Prohexadione

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