ระดับชั้น

ระดับชั้น

ผลลัพธ์ (อังกฤษ) 1:

Class.

ผลลัพธ์ (อังกฤษ) 2:

level

ผลลัพธ์ (อังกฤษ) 3:

2.2. Sample treatment and determination of mineral content.Sample preparation and determination of mineral contents.Were according to Jiang Wu Feng,,,, Yang and Shi (2007). Rice powder.(0.5 g) was weighed and placed into, a crucible and then carbonized.At 250 C on an electro thermal plate until the sample.Turned into black but not smoking completely. The crucibles with.Samples were dry-ashed by heating in a muffle furnace at 550 C.(about 10 - 12 h). After, sample incineration a white residue was.Obtained which was, carefully transferred into a 50 mL volumetric.Flask dissolved with, 5 mL of 6 M HCl and then diluted to 50 mL.With water. The diluted solutions were subjected to analysis for.Ca Mg Na,,,,,, K Fe Zn and Cu by inductively coupled plasma mass.Spectroscopy (ICP-MS) (Agilent 7500A; Agilent, Technologies Inc.).