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ISO 4327

Non-ionic surface active agents; Polyalkoxylated derivatives; Determination of hydroxyl value; Phthalic anhydride method

Số trang: 8
Ngày phát hành: 1979-12-00

Liên hệ
The hydroxyl groups are esterified by phthalic anhydride in pyridine solution. The excess of phthalic anhydride is hydrolyzed with water containing in the sodium hydroxide solution used for the neutralization. The acidity which appears during the esterification and of the phthalic acid formed during the hydrolysis is neutralized by sodium hydroxide solution in the presence of phenolphthalein as indicator. The hydroxyl value is calculated from the difference between the volumes of sodium hydroxide solution used for the titration of the blank and of the test solution.
Số hiệu tiêu chuẩn
ISO 4327
Tên tiêu chuẩn
Non-ionic surface active agents; Polyalkoxylated derivatives; Determination of hydroxyl value; Phthalic anhydride method
Ngày phát hành
1979-12-00
Trạng thái
Có hiệu lực
Tiêu chuẩn tương đương
GB/T 7383 (2007), NEQ * NF T73-273 (1978-09-01), MOD * GOST R ISO 4327 (1994), IDT * TS 5981 (1988-09-20), IDT * NBN T 63-143 (1980), IDT * NEN-ISO 4327 (1983), IDT * NP-2045 (1983), IDT * NEN-ISO 4327:1983 en (1983-02-01), IDT
Tiêu chuẩn liên quan
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Thay thế bằng
Lịch sử ban hành
ISO 4327 (1979-12)
Non-ionic surface active agents; Polyalkoxylated derivatives; Determination of hydroxyl value; Phthalic anhydride method
Số hiệu tiêu chuẩn ISO 4327
Ngày phát hành 1979-12-00
Mục phân loại 71.100.40. Tác nhân hoạt động bề mặt
Trạng thái Có hiệu lực
Từ khóa
Chemical analysis and testing * Connections * Detergents * Determination * Hydroxyl value * Non-ionic active matter * Surfactants * Joints * Junctions * Compounds
Số trang
8