Then 10 ml of filtrate and 15 ml of standard 0.1 M HCl were mixed and base titrated against 0.1 M NaOH.
The soil TN was calculated using the formula: Kjeldahl ;N; = (T - B) times M times frac{2.8}{S}where T ml of standard acid with sample titration, B ml of standard acid with blank titration, M molarity of sulphuric acid, S weight of soil sample (g), and 2.8 a constant.
For standard curve 0, 1, 2, 3, 4 and 5 ml of standard solutions were added into a 100 ml flask and diluted to give 0, 50, 100, 150, 400 and 500 mg/l of gallic acid.
In experiments of the batch kinetic adsorption, 50 mL of standard solution with an adjusted pH (4.5) and 25 mg of the calcium alginate beads were shaken with the use of a shaker (250 rpm) in a thermostat water bath.
Standard solution containing 25 μg/mL of diacerein and 50 μg/mL of aceclofenac was prepared by transferring 5 mL of standard stock solution to 50-mL volumetric flask and diluting with the mobile phase.
0.1 mL of diluted sample was mixed with 3.75 mL of doubly distilled water, 1.0 mL of borate buffer (pH 8.5), 0.15 mL of standard methylsalicylate solution, and 0.10 g of xerogel, and then shaken for 15 min.
During the first treatment cycle, 1,500 ml of standard solution containing 37.5 g of arginine hydrochloride and 37.5 g of lysine hydrochloride (pH, 7.0) was administered within 4 h (0.5 to 1 h prior to PRRT and for a total of 3 to 3.5 h after therapy; infusion rate, 375 ml/h).
10.0 mL of hydrolyzed sample was mixed with 20.0 mL of standard salicylate solution, then pH was adjusted to 6.2, and then the solution was transferred to a 50.0 mL volumetric flask, which was diluted to the mark with doubly distilled water.
U. thermosphaericus cells (5.12 g, wet weight) suspended in about 20 ml of standard buffer were disrupted by sonication (UD-201; Tomy Seiko, Tokyo), which entailed five cycles of 60-s pulses (50 W) followed by a 60-s rest on ice.
