氮吸附检测标准氮吸附-中析研究所检测

(CMA)

(CNAS)

(ISO)

(高新技术企业)

氮吸附相关标准参考信息

GB/T 10722-2014 炭黑总表面积和外表面积的测定氮吸附法
简介：本标准规定了用Brunauer、Emmett、Teller(B.E.T. NSA)的多分子层吸附理论多点法测定总表面积,以及用统计吸附层厚度表面积方法测定外表面积。本标准适用于橡胶用炭黑、色素炭黑、乙炔炭黑和沉淀水合二氧化硅(白炭黑)。
信息：ICS：83.040.30 CCS：G49 发布：2014-12-31 实施：2015-07-01

YS/T 1161.3-2016 拟薄水铝石分析方法第3部分：孔容和比表面积的测定氮吸附法
简介：
信息：ICS：77.120.10 CCS：H21 发布：2016-07-11 实施：2017-01-01

ASTM D4222-03(2008) 通过静态体积测量测定催化剂和催化剂载体的氮吸附和解吸等温线的标准测试方法
简介：
信息：ICS：17.060 CCS：发布：2008-04-01 实施：

GB/T 10322.8-2009 铁矿石.比表面积的单点测定.氮吸附法
简介：GB/T 10322的本部分规定了用氮吸附法测定铁矿石比表面积的单点测定方法。本部分适用于铁矿石细精粉。
信息：ICS：73.060.10 CCS：D31 发布：2009-10-30 实施：2010-05-01

ASTM D6556-16 炭黑的标准试验方法&x2014；氮吸附的总表面积和外表面积
简介：
信息：ICS：71.060.10 CCS：发布：2016-01-01 实施：

ASTM D4567-03(2008) 通过连续流动法使用氮吸附法对催化剂和催化剂载体的比表面积单点测定的标准测试方法
简介：
信息：ICS：71.040.30 CCS：发布：2008-04-01 实施：

GB/T 6609.35-2009 氧化铝化学分析方法和物理性能测定方法.第35部分:比表面积的测定氮吸附法
简介：GB/T 6609的本部分规定了采用氮吸附单点法或多点法测定氧化铝的比表面积(SSA)的方法。本部分适用于氧化铝比表面积的测定:测定范围:50㎡/g—90㎡/g.
信息：ICS：71.100.10 CCS：H12 发布：2009-04-15 实施：2010-02-01

ASTM D6556-2016 碳黑的标准试验方法. 采用氮吸附法测定碳黑总体和外部表面面积
简介：4.1x00a0;This test method is used to measure the total and external surface area of carbon blacks based on multipoint nitrogen adsorption. The NSA measurement is based on the B.E.T. theory and it includes the total surface area, inclusive of micropores, pore diameters less than 2 nm (20 x00c5;). The external surface area, based on the statistical thickness method (STSA), is defined as the specific surface area that is accessible to rubber. 4.2x00a0;CTAB Surface Area (formerly Test Method D3765) has been withdrawn. The CTAB value may be estimated from the STSA value using Eq 1. The equation is based on a linear regression of the STSA and CTAB measured values of the SRB 5 standards. 1.1x00a0;This test method covers the determination of the total surface area by the Brunauer, Emmett, and Teller (B.E.T. NSA) theory of multilayer gas adsorption behavior using multipoint determinations and the external surface area based on the statistical thickness surface area method. 1.2x00a0;The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3x00a0;This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. (The minimum safety equipment should include protective gloves, sturdy eye and face protection).
信息：ICS：71.060.10 CCS：发布：2016 实施：

ASTM D6556-07 氮吸附法测定炭黑总量和外表面积的标准试验方法
简介：
信息：ICS：71.060.10 CCS：发布：2007-10-01 实施：

GB/T 13390-2008 金属粉末比表面积的测定.氮吸附法
简介：本标准规定了金属粉末比表面积的测定方法。本标准适用于金属粉末比表面积的测定。测定范围0.1m/g～1000m/g。非金属粉末及微孔材料的比表面积测定亦可参照使用。本标准所测定比表面积为粉末的总比表面积，包括氮分子可进入粉末体的任何开孔比表面积；它不同于用空气透过法测定的比表面积，后者系指包络表面积。
信息：ICS：77.160 CCS：H16 发布：2008-03-21 实施：2008-09-01

ASTM D4222-03(2015)e1 通过静态体积测量测定催化剂和催化剂载体的氮吸附和解吸等温线的标准测试方法
简介：
信息：ICS：17.060 CCS：发布：2015-04-01 实施：

ASTM D5604-96(2006) 单点沉淀二氧化硅表面积的标准测试方法B.E.T.氮吸附
简介：
信息：ICS：19.120 CCS：发布：2006-10-01 实施：

GB/T 10722-2003 炭黑总表面积和外表面积的测定氮吸附法
简介：本标准规定了用Brunauer、Emmett、Teller（B.E.T NSA）的多分子层吸附理论多点法测定总表面积和外表面积的原理、意义、用途、试剂、材料、仪器、采样、分析步骤、结果计算、精密度及试验报告。本标准适用于橡胶用炭黑、色素炭黑和乙炔炭黑。本标准也适用于白炭黑。
信息：ICS：83.040.30 CCS：G49 发布：2003-10-11 实施：2004-05-01

ASTM C1069-09(2014) 通过氮吸附的氧化铝或石英的比表面积的标准测试方法
简介：
信息：ICS：81.060.10 CCS：发布：2014-12-01 实施：

BS ISO 8008-2006 主要用于铝生产的氧化铝.用氮吸收法测定表面吸附指数
简介：This International Standard specifies an instrumental method for the determination of specific surface area (SSA) of smelter-grade alumina (SGA) by nitrogen adsorption by a single- or multi-point method. A multi-point method is recommended due to the higher accuracy obtained; if a single-point method is used, a lower result will be obtained. NOTE Annex A provides an explanation of the difference between single- and multi-point determined BET SSA. This International Standard is applicable to aluminas having a surface area between 50 m/g and 90 m/g.
信息：ICS：71.100.10 CCS：D52 发布：2006-01-23 实施：2006-01-23

GB/T 13390-1992 金属粉末比表面积的测定氮吸附法
简介：本标准规定了金属粉末比表面积的测定方法。本标准适用于金属粉末比表面积的测定。测定范围为0.1～1000m/g。非金属粉末及微孔材料的比表面积测定亦可参照使用。本标准所测表面积为粉末的总表面积，包括氮分子可进入粉末体的任何开孔表面积；它不同于用空气透过法测定的表面积，后者系指包络表面积。
信息：ICS：77.040.30 CCS：H21 发布：1992-02-19 实施：1992-10-01

KS M ISO 4652-2014(2019) 橡胶配料 - 炭黑 - 通过氮吸附法测定比表面积 - 单点程序
简介：
信息：ICS：83.040.20 CCS：发布：2014-09-02 实施：

ISO 8008:2005 主要用于生产铝的氧化铝——氮吸附法测定比表面积
简介：
信息：ICS：71.100.10 CCS：发布：2005-11-01 实施：

GB/T 2596-1981 钨粉,碳化钨粉比表面积(平均粒度)测定简化氮吸附法
简介：本方法适用于测定钨粉及碳化钨粉的比表面积（平均粒度），测定范围为0.01～4微米。注：改变Vc和Vs的体积可以适当扩大测定范围。
信息：ICS：77.040.30 CCS：H21 发布：1981-06-07 实施：1982-03-01

ASTM D6556-14 炭黑&mdash的标准试验方法；氮吸附的总表面积和外表面积
简介：
信息：ICS：71.060.10 CCS：发布：2014-06-01 实施：

ISO 8008-2005 铝生产用氧化铝.氮吸附作用的比表面积测定
简介：This International Standard specifies an instrumental method for the determination of specific surface area (SSA) of smelter-grade alumina (SGA) by nitrogen adsorption by a single- or multi-point method. A multi-point method is recommended due to the higher accuracy obtained; if a single-point method is used, a lower result will be obtained.NOTE Annex A provides an explanation of the difference between single- and multi-point determined BET SSA.This International Standard is applicable to aluminas having a surface area between 50 m/g and 90 m/g.
信息：ICS：71.100.10 CCS：D41 发布：2005-10 实施：

T/ZZB 2799—2022 变压吸附（PSA）制氮设备
简介：本文件规定了变压吸附（PSA）制氮设备（以下简称制氮设备）的术语和定义、基本参数及设计条件、基本要求、技术要求、试验方法、检验规则、标志、包装及运输和贮存、质量承诺。本文件适用于在常温下利用压缩空气采用分子筛变压吸附法，从空气中分离制取氮气，制氮产量不大于5000m3/h的设备。注1：本文件中氮产量均为标准状态，即0℃、0.101325MPa(绝压）状态下的气体量，单位为立方米（m3)。注2：压力值除注明者外均为表压值。
信息：ICS：71.100.20 CCS：C346 发布：2022-12-08 实施：2023-02-24

CB/T 4242-2013 船用变压吸附制氮装置
简介：本标准规定了船用变压吸附制氮装置(以下简称制氮装置)产品分类、规格、型号、要求、检验方法、检验规则及标志、包装、运输和贮存。本标准适用装设于船舶(包括海上石油平台)上的变压吸附制氮装置的设计、制造和验收。
信息：ICS：47.020.50 CCS：U42 发布：2013-12-31 实施：2014-07-01

ASTM D6556-04 氮吸附法测定炭黑总量和外表面积的标准试验方法
简介：
信息：ICS：71.060.10 CCS：发布：2004-11-01 实施：

ASTM C1069-09(2022) 用氮吸附法测定氧化铝或石英比表面积的标准试验方法
简介：
信息：ICS：81.060.10 CCS：发布：2022-05-01 实施：

ASTM D1993-03(2013)e1 用多点BET氮吸附法测定沉淀二氧化硅表面积的标准试验方法
简介：
信息：ICS：71.060.20 CCS：发布：2013-11-01 实施：

ASTM C1069-86(2004)e1 通过氮吸附的氧化铝或石英的比表面积的标准测试方法
简介：
信息：ICS：81.060.10 CCS：发布：2004-04-01 实施：

ASTM D5604-21 用单点B.E.T.氮吸附法测定沉淀二氧化硅表面积的标准试验方法
简介：
信息：ICS：19.120 CCS：发布：2021-11-01 实施：

ASTM D1993-03(2013) 用多点BET氮吸附法测定沉淀二氧化硅表面积的标准试验方法
简介：
信息：ICS：71.060.20 CCS：发布：2013-11-01 实施：

KS M ISO 8008-2003 主要用于铝生产的氧化铝.吸附氮的比表面面积的测定.单点法
简介：이 규격은 금속 제조용으로 사용되는 산화 알루미늄의 질소 흡착에 의한 비표면적 측정을
信息：ICS：71.100.10 CCS：D41 发布：2003-12-20 实施：2003-12-20

T/CPCIF 0140-2021 催化剂载体拟薄水铝石比表面积和孔容的测定氮吸附法
简介：处于气体体系中的样品比表面（颗粒外部和内部通孔的比表面积）在低温下将发生物理吸附，当吸附达平衡时测量平衡吸附压力和吸附的气体量，根据BET参数方程计算比表面积；在相对压力p/p0＝0.98时，根据所吸附的氮气体积计算出样品孔容。
信息：ICS：71.040.01 CCS：C261 发布：2021-10-20 实施：2021-11-15

ASTM D4567-03(2013) 通过连续流动法使用氮吸附法对催化剂和催化剂载体的比表面积单点测定的标准测试方法
简介：
信息：ICS：71.040.30 CCS：发布：2013-04-01 实施：

KS M ISO 8008-2003(2018) 氧化铝通过氮吸附 - 单点法主要用于生产特定表面积的铝 - 测定
简介：
信息：ICS：71.100.10 CCS：发布：2003-12-20 实施：

NF T45-105-2020 橡胶助剂. 炭黑. 用氮吸附法测定比表面积. 单点法
简介：Le présent document spécifie deux méthodes pour la détermination de la surface spécifique des types et qualités de noirs de carbone utilisés dans l'industrie du caoutchouc:- méthode A: méthode par chromatographie en phase gazeuse (méthode du gaz vecteur) automatique;- méthode B:
信息：ICS：83.040.20 CCS：G49 发布：2020-10-30 实施：2020-10-30

ISO 4652:2012 橡胶配合剂——炭黑——用氮吸附法测定比表面积——单点程序
简介：
信息：ICS：83.040.20 CCS：发布：2012-06-13 实施：

ASTM D4222-03 用静态容量测量法测定催化剂的氮吸附和脱附等温线的标准试验方法
简介：
信息：ICS：17.060 CCS：发布：2003-10-01 实施：

ASTM D4222-20 通过静态体积测量测定催化剂和催化剂载体的氮吸附和解吸等温线的标准测试方法
简介：
信息：ICS：17.060 CCS：发布：2020-10-01 实施：

KS M ISO 4652-1-2010 橡胶配合剂.炭黑.用氮吸附法测定比表面积.第1部分:单点法
简介：이 표준은 고무 공장에서 사용하는 카본 블랙의 등급과 유형에 따른 비표면적을 측정하기 위한
信息：ICS：83.040.20 CCS：G34 发布：2010-09-20 实施：2010-09-20

ASTM D4567-03 通过连续流动法使用氮吸附法对催化剂和催化剂载体的比表面积单点测定的标准测试方法
简介：
信息：ICS： CCS：发布：2003-10-01 实施：

ISO 4652-2020 橡胶配料 - 炭黑 - 通过氮吸附法测定比表面积 - 单点程序
简介：
信息：ICS：83.040.20 CCS：发布：2020-07-23 实施：

ASTM D6556-10 氮吸附法测定炭黑总量和外表面积的标准试验方法
简介：
信息：ICS：71.060.10 CCS：发布：2010-08-01 实施：

ASTM D6556-03 炭黑的标准试验方法&8212；氮吸附的总表面积和外表面积
简介：
信息：ICS：71.060.10 CCS：发布：2003-07-10 实施：

ASTM D4567-19 通过连续流动法使用氮吸附法对催化剂和催化剂载体的比表面积单点测定的标准测试方法
简介：
信息：ICS：71.040.30 CCS：发布：2019-07-01 实施：

ASTM D6556-2010 氮吸附法炭黑的总表面积和外表面积的标准试验方法
简介：This test method is used to measure the total and external surface area of carbon blacks based on multipoint nitrogen adsorption. The NSA measurement is based on the B.E.T. theory and it includes the total surface area, inclusive of micropores, pore diameters less than 2 nm (20 ?/span>). The external surface area, based on the statistical thickness method (STSA), is defined as the specific surface area that is accessible to rubber. CTAB Surface Area (formerly Test Method D3765) has been withdrawn. The CTAB value may be estimated from the STSA value using Eq 1. The equation is based on a linear regression of the STSA and CTAB measured values of the SRB 5 standards.1.1 This test method covers the determination of the total surface area by the Brunauer, Emmett, and Teller (B.E.T. NSA) theory of multilayer gas adsorption behavior using multipoint determinations and the external surface area based on the statistical thickness surface area method. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. (The minimum safety equipment should include protective gloves, sturdy eye and face protection).
信息：ICS：71.060.10 CCS：G49 发布：2010 实施：

AS 2879.4-2003 氧化铝.用氮吸附法测定专用表面区域
简介：Specifies an instrumental method for the determination of specific surface area of smelter-grade aluminium by nitrogen adsorption by a single or multi-point method.
信息：ICS：73.060.99 CCS：D41 发布：2003-03-25 实施：

ASTM D6556-19 炭黑的标准试验方法&x2014；氮吸附的总表面积和外表面积
简介：
信息：ICS：71.060.10 CCS：发布：2019-01-01 实施：

ASTM D6556-09 氮吸附法测定炭黑总量和外表面积的标准试验方法
简介：
信息：ICS：71.060.10 CCS：发布：2009-02-15 实施：

ASTM D1993-03 用多点BET氮吸附法测定沉淀二氧化硅表面积的标准试验方法
简介：
信息：ICS：71.060.20 CCS：发布：2003-01-10 实施：

ASTM D1993-18 用多点BET氮吸附法测定沉淀二氧化硅表面积的标准试验方法
简介：
信息：ICS：71.060.20 CCS：发布：2018-06-01 实施：

ASTM C1069-09 通过氮吸附的氧化铝或石英的比表面积的标准测试方法
简介：
信息：ICS：81.060.10 CCS：发布：2009-01-01 实施：

ASTM D4222-2003(2015)e1 采用静态体积测量法测定催化剂和催化剂载体的氮吸附和解吸等温线的标准试验方法
简介：5.1x00a0;The test method has two main functions: first, it provides data useful for establishing the pore size distribution of catalyst materials, which in turn may influence their performance; and second, it serves as a laboratory test which may be used to study porosity changes that may occur during the manufacture and evaluation of catalysts. 1.1x00a0;This test method covers the determination of nitrogen adsorption and desorption isotherms of catalysts and catalyst carriers at the boiling point of liquid nitrogen.2 A static volumetric measuring system is used to obtain sufficient equilibrium adsorption points on each branch of the isotherm to adequately define the adsorption and desorption branches of the isotherm. Thirty points evenly spread over the isotherm is considered to be the minimum number of points that will adequately define the isotherm. 1.2x00a0;The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3x00a0;This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
信息：ICS：17.060;71.040.30 CCS：发布：2003 实施：

SH/T 0959-2017 催化裂化催化剂比表面积的测定静态氮吸附容量法
简介：
信息：ICS：ICS71.100.99 CCS：G74 发布：2017-12-27 实施：2018-06-01

ASTM C1069-2009 用氮吸附法测定氧化铝和石英表面特性的标准试验方法
简介：Both sellers and purchasers of alumina and quartz will find the test method useful to determine the specific surface area and indirectly as a measure of the particle size for material specifications, manufacturing control, and research and development.1.1 This test method covers the determination of the specific surface area of aluminas and silicas used in the manufacture of ceramics. The test method is a general one, permitting the use of any modern commercial nitrogen adsorption apparatus but strictly defining the outgassing procedure. Calculations are based on the Brunauer-Emmett-Teller (BET) equation. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
信息：ICS：81.060.10 (Raw materials) CCS：Q65 发布：2009 实施：

ASTM D4567-2003(2013) 连续流动法单点测定用氮吸附的催化剂和催化剂载体比表面积的标准试验方法
简介：5.1x00a0;This test method is useful for determining the specific surface area of catalysts and catalyst carriers for material specifications, manufacturing control, and research and development in the evaluation of catalysts. 1.1x00a0;This test method covers the single-point determination of the surface area of catalysts and catalyst carriers that exhibit Type II or Type IV nitrogen adsorption isotherms using a nitrogen-helium flowing gas mixture. This test method is applicable for the determination of total surface areas from 0.1 to 300 m2, where rapid surface area determinations are desired. 1.2x00a0;Because the single-point method uses an approximation of the BET equation, the multipoint BET method (Test Method D3663) is preferred to the single-point method.Note 1x2014;This is particularly true when testing microporous materials. 1.3x00a0;The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4x00a0;This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
信息：ICS：71.040.30 (Chemical reagents) CCS：发布：2003 实施：

ASTM D6556-17 炭黑的标准试验方法&x2014；氮吸附的总表面积和外表面积
简介：
信息：ICS：71.060.10 CCS：发布：2017-10-01 实施：

ASTM C1069-2009(2014) 采用氮吸附法的氧化铝或石英特殊表面区域的标准试验方法
简介：4.1x00a0;Both sellers and purchasers of alumina and quartz will find the test method useful to determine the specific surface area and indirectly as a measure of the particle size for material specifications, manufacturing control, and research and development. 1.1x00a0;This test method covers the determination of the specific surface area of aluminas and silicas used in the manufacture of ceramics. The test method is a general one, permitting the use of any modern commercial nitrogen adsorption apparatus but strictly defining the outgassing procedure. Calculations are based on the Brunauer-Emmett-Teller (BET) equation. 1.2x00a0;The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3x00a0;This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
信息：ICS：81.060.10 CCS：发布：2009 实施：

ASTM D4567-2003(2008) 连续流动法单点测定用氮吸附的催化剂和催化剂载体比表面积的标准试验方法
简介：This test method is useful for determining the specific surface area of catalysts and catalyst carriers for material specifications, manufacturing control, and research and development in the evaluation of catalysts. 1.1 This test method covers the single-point determination of the surface area of catalysts and catalyst carriers that exhibit Type II or Type IV nitrogen adsorption isotherms using a nitrogen-helium flowing gas mixture. This test method is applicable for the determination of total surface areas from 0.1 to 300 m2, where rapid surface area determinations are desired. 1.2 Because the single-point method uses an approximation of the BET equation, the multipoint BET method (Test Method D 3663) is preferred to the single-point method. Note 18212;This is particularly true when testing microporous materials. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
信息：ICS：71.040.30 (Chemical reagents) CCS：G74 发布：2003 实施：

ASTM D6556-2017 氮吸附法测定炭黑总表面和外表面积的标准试验方法
简介：4.1x00a0;This test method is used to measure the total and external surface area of carbon blacks based on multipoint nitrogen adsorption. The NSA measurement is based on the B.E.T. theory and it includes the total surface area, inclusive of micropores, pore diameters less than 2 nm (20 x00c5;). The external surface area, based on the statistical thickness method (STSA), is defined as the specific surface area that is accessible to rubber. 4.2x00a0;CTAB Surface Area (formerly Test Method D3765) has been withdrawn. The CTAB value may be estimated from the STSA value using Eq 1. The equation is based on a linear regression of the STSA and CTAB measured values of the SRB 5 standards. 1.1x00a0;This test method covers the determination of the total surface area by the Brunauer, Emmett, and Teller (B.E.T. NSA) theory of multilayer gas adsorption behavior using multipoint determinations and the external surface area based on the statistical thickness surface area method. 1.2x00a0;The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3x00a0;This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (The minimum safety equipment should include protective gloves, sturdy eye and face protection). 1.4x00a0;This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
信息：ICS：71.060.10 CCS：G49 发布：2017 实施：

ASTM D1993-03(2008) 用多点BET氮吸附法测定沉淀二氧化硅表面积的标准试验方法
简介：
信息：ICS：71.060.20 CCS：发布：2008-07-01 实施：

ASTM D4222-2003(2008) 静态体积测量法测定催化剂和催化剂载体氮吸附和解附等温线的标准试验方法
简介：The test method has two main functions: first, it provides data useful for establishing the pore size distribution of catalyst materials, which in turn may influence their performance; and second, it serves as a laboratory test which may be used to study porosity changes that may occur during the manufacture and evaluation of catalysts.1.1 This test method covers the determination of nitrogen adsorption and desorption isotherms of catalysts and catalyst carriers at the boiling point of liquid nitrogen. A static volumetric measuring system is used to obtain sufficient equilibrium adsorption points on each branch of the isotherm to adequately define the adsorption and desorption branches of the isotherm. Thirty points evenly spread over the isotherm is considered to be the minimum number of points that will adequately define the isotherm. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
信息：ICS：71.040.30 (Chemical reagents) CCS：G74 发布：2003 实施：