API 4050-1969
确定以 2 4-二硝基苯基腙形式排出的羰基的程序

PROCEDURES FOR DETERMINING EXHAUST CARBONYLS AS 2@4-DINITROPHENYLHYDRAZONES

非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 API 4050-1969 前三页，或者稍后再访问。

您也可以尝试购买此标准，
点击右侧 “购买” 按钮开始采购（由第三方提供）。

注意： 点击下载后，生成下载文件时间比较长，请耐心等待......

标准号

API 4050-1969

发布

1969年

发布单位

API - American Petroleum Institute

当前最新

API 4050-1969

 

 

适用范围

INTRODUCTION The conclusion of a study conducted by the Bureau of Mines during 1966 (1)* established the need for a reliable@ quantitative method of analyzing exhaust carbonyls. The 1966 study demonstrated that the 3-methy1-2-benzothiazolone hydrazone (MBTH) method of analysis has limited utility The reasons are: (a) The MBTH method provides only a collective measure of aldehyde components@ (b) The method is limited to aliphatic aldehydes only@ (c) The responses are not the same for all the aliphatic aldehydes. In 1967@ Bureau of Mines researchers initiated a study of the DNPH method (2-4) for exhaust carbonyl determination. The 1967 effort was expended primarily in development of procedures for gravimetric and chromatographic analysis of synthetic carbonyl mixtures by the DNPH method. However@ a small number of tests were made upon exhaust samples also. Data from these preliminary tests using exhaust showed that (a) results by the gravimetric and by the chromatographic variations of the DNPH method disagree significantly@ and (b) a large sample volume is necessary for exhaust analysis by the DNPH method. These findings raised questions regarding usefulness of the DNPH method and prompted the 1968 study@ The 1968 research objective was to develop a reliable DNPH procedure that would provide detailed compositional data on exhaust carbonyls and would be compatible with the sampling techniques that involve variable-dilution proportional samplers. To this end@ the chromatographic variation of the DNPH method was developed to minimize or circumvent errors associated with hydrazone losses and interferences. Following such development@ reliability of the resultant procedure was evaluated by comparing it with the gravimetric and colorimetric (5) variations of the DNPH method. The 1968 study was conducted in two phases. The first phase consisted of developing specific procedures for determining exhaust carbonyls by the GC-DNPH@ Col-DNPH@ and Gr-DNPH methods. The second phase consisted of a comparison program that involved parallel application of the three variations upon a number of exhaust samples@ Following is a discussion of experimental details and results from each phase. * Underlined numbers in parentheses refer to items in the list of references at the end of this report.

API 4050-1969相似标准

推荐

硝基苯 测试方法

AENOR

BE-NBN

台湾地方标准

天津市地方标准

吉林省地方标准

山东省地方标准

国家质检总局

卫生部国家职业卫生标准

国家卫生健康委员会

行业标准-化工

行业标准-环保

行业标准-农业

行业标准-水产

行业标准-水利

行业标准-商品检验

中国团体标准

行业标准-兵工民品

行业标准-卫生

德国标准化学会

德国机械工程师协会

丹麦标准化协会

法国标准化协会

英国标准学会

欧洲标准化委员会

立陶宛标准局

PL-PKN

RU-GOST R

美国材料与试验协会

中华人民共和国国家卫生和计划生育委员会

中华人民共和国环境保护部

国家质量监督检验检疫总局

工业和信息化部

海关总署