Standard No.:	GB/T 10267.4-1988
English Name:	Method for analysis of calcium metal-The determination of aluminium by oxine chloroform extraction photometric method
Chinese Name:	金属钙分析方法 8-羟基喹啉-三氯甲烷萃取分光光度法测定铝
Professional Classification:	GB    National Standard
Issued on:	1988-1-2
Implemented on:	1989-10-1
Status:	to be superseded
Superseded by:	GB/T 10267.4-2025 Methods for analysis of calcium metal—Part 4:Determination of aluminum by 8-hydroxyquinoline-trichloromethane extraction spectrophotometry
Superseded on:	2026-5-1
Target Language:	English
File Format:	PDF
Word Count:	2000 words
Translation Price(USD):	84.0
Delivery:	via email in 1 business day

1 Subject content and applicable scope This standard describes the determination theory of aluminium in calcium metal, and specifies the analytical procedures, result calculation and method precision. It is applicable to the determination of aluminum in calcium metal. The determination range is 10~1 000μg/g with allowable amount of impurities (mg/g): 1.5 of Fe, 3.0 of Cu, 1.0 of Mn, 1.0 of Ni, 0.3 of Cr, 0.3 of Co and 10.0 of Mg. 2 Method summary Dissolve the specimen with hydrochloric acid (1+1), add sodium acetate and copper reagents, adjust the pH value to 5.6~6.0, extract and separate impurities such as iron, nickel, copper and manganese with chloroform, and then add oxine chloroform to extract aluminium, and measure the absorbance of the organic phase at 390nm spectrophotometer wavelength. 3 Instrument 3.1 Spectrophotometer (wavelength of 390nm may be selected). 3.2 Acidometer (pH value error is not more than 0.1). 3.3 Glass electrode. 3.4 Calomel electrode.

1 Subject content and applicable scope 2 Method summary 3 Apparatuses 4 Reagents 5 Plotting of standard curve 6 Procedure 7 Calculation of analytical results 8 Method precision