GB/T 5327-1985
Replaced
GB/T 7383-2020
Active
National standards
GB/T 7383-2020 Non-ionic surface active agents—Determination of hydroxyl value
GB/T 7383-2020 Non-ionic surface active agents—Determination of hydroxyl value
Basic Information
Standard Code:
GB/T 7383-2020
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Basic standards and general methods for surfactants
ICS Name:
Surfactants and other auxiliary agents
Publish Date:
2020-12-14
Implement Date:
2021-07-01
Publisher:
国家市场监督管理总局、国家标准化管理委员会
Technical Committee:
全国化学标准化技术委员会(SAC/TC 63)
Pages:
25 pages
Scope
本标准规定了非离子表面活性剂中羟值的测定。
本标准适用于脂肪族和脂环族的聚烷氧基化合物的羟值（伯脂肪醇，烷基酚和脂肪酸的环氧乙烷、环氧丙烷及其混合物的加成物的羟值）的测定，适用于羟值在10～1 000的测定。
邻苯二甲酸酐法适用于伯仲脂肪醇、烷基酚和脂肪酸的环氧乙烷、环氧丙烷及其混合物的加成物羟值的测定。
乙酐法适用于伯仲脂肪醇、烷基酚和脂肪酸的环氧乙烷加成物的羟值的测定，不适用于丙氧基化产品的羟值的测定。
近红外法适用于能采用邻苯二甲酸酐法或乙酐法测定羟值的非离子表面活性剂。
产生干扰的物质如下：
——伯和仲胺、酰胺、叔醇、硫醇和环氧化物产生副反应而影响方法的准确度。
——长碳链脂肪族酸和酯会产生比邻苯二甲酸酐乙酐更稳定的酐，而其在测定终了时也不能完全被分解。
——其他的游离酸因与氢氧化钠标准溶液反应而有干扰,碱包括某种叔胺因与生成的邻苯二甲酸、乙酸反应而产生干扰。
环氧化物的存在对测定有干扰，若能用低温真空蒸馏法予以除去，并且不改变羟值，本方法仍适用。上述的处理可以消除浓度（质量分数）高于0.5%产生干扰的游离环氧乙烷。
试样中存在的水分会与邻苯二甲酸酐、乙酐反应，但若遵循测定步骤中所述的措施去预防，本方法仍可适用。
Development Information
Drafting Units:
浙江皇马科技股份有限公司、扬州晨化新材料股份有限公司、辽宁奥克化学股份有限公司、联泓新材料科技股份有限公司、江苏德纳化学股份有限公司、浙江绿科安化学有限公司
Drafting Persons:
唐福伟、郑凯瑾、余渊荣、毕继辉、贾正仁、房连顺、董振鹏、刘卫琴、吴炳谋、张晨辉、李爱婷、向珏贻、张学君、徐燕、梁志淼
Replace the following standards
Referenced Standards
ISO 4327
GB/T 601-2002 Chemical reagent Preparations of standard volumetric solutions
GB/T 601-2016 Chemical reagent—Preparations of reference titration solutions
GB/T 2384-1992 Dye intermediates—General method for the determination of melting range
GB/T 2384-2007 Dyes intermediates—General method for the determination of melting range
GB/T 2384-2015 Dyes intermediates—General method for the determination of melting range
GB/T 2384-2021 Dyes intermediates—General method for the determination of melting range
GB/T 3143-1982 Color determination method of liquid chemicals (Hazen unit—platinum-cobalt scale)
GB/T 6365-1986 Surface active agents—Determination of free alkalinity or free acidity—Titrimetric method
GB/T 6365-2006 Surface active agents—Determination of free alkalinity or free acidity—Titrimetric method
GB/T 6372-1986 Surface active agents and detergents—Division of powder sample
GB/T 6372-2006 Surface active agents and detergents—Methods of sample division
GB/T 8170-1987 Rules for rounding off of numberical values
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 11275-1995 Surface active agents and soaps—Determination of water content—Azeotropic distillation method
GB/T 11275-2007 Surface active agents—Determination of water content
GB/T 29858-2013 Standard guidelines for molecular spectroscopy multivariate calibration quantitative analysis
GB/T 11275-2026 Surface active agents—Determination of water content
Adopt standards
ISO 4326:1980
Related Standards
GB/T 5328-1985
Active
GB/T 5328-1985 Surface active agents—Simplified classification
GB/T 5553-1985
Replaced
GB/T 5553-1985 Surface active agents—Textile auxiliaries—Method for determination of water repellency of waterprooting agents—Hydrostatic pressure test
GB/T 5554-1985
Replaced
GB/T 5554-1985 Surface active agents—Textile auxiliaries—method for determination of water repellency of waterprooting agents—Spray test
GB/T 6365-1986
Replaced
GB/T 6365-1986 Surface active agents—Determination of free alkalinity or free acidity—Titrimetric method
GB/T 6369-1986
Replaced