ISO 422-1994 Photography - Processing chemicals - Specifications for p-methylaminophenol sulfate《摄影 冲洗用化学品 甲基对氨基苯酚硫酸盐规范》.pdf
《ISO 422-1994 Photography - Processing chemicals - Specifications for p-methylaminophenol sulfate《摄影 冲洗用化学品 甲基对氨基苯酚硫酸盐规范》.pdf》由会员分享,可在线阅读,更多相关《ISO 422-1994 Photography - Processing chemicals - Specifications for p-methylaminophenol sulfate《摄影 冲洗用化学品 甲基对氨基苯酚硫酸盐规范》.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、INTERNATIONAL STANDARD ISO 422 Second edition 1994-1 O-l 5 Photography - Processing chemicals - Specifications for p-methylaminophenol sulfate Photographie - Produits chimiques de traitement - Spbifications pour Ie sulfa te de p-m m is the mass, in grams, of the test Portion; 8,6l is the conversion
2、factor obtained from the mass of pmethylaminophenol sulfate equiv- alent to 1 mole of ammonium cerate (i.e. 86,l) x the conversion factor for millilitres to litres (i.e. 0,001) x 100 (for percentage). 7.2 Assay - Alkali titration 72.1 Specification Content of HOC,H,NHCH3-1/2H,SO, shall be 97,5 % (m/
3、m) min. 7.22 Reagents 722.1 Acetone, (CH V is the volume, in millilitres, of the sodium hydroxide (7.2.2.2) used to resch the titration endpoint; m is the mass, in grams, of the test Portion; 17,22 is the conversion factor obtained from the mass of pmethylaminophenol sulfate equivalent to 1 mole of
4、sodium hydroxide (i.e. 172,2) x the conversion factor for millilitres to litres (i.e. 0,001) x 100 (for percentage). 7.3 Identity tests 7.3.1 Melting Point of nitroso derivative 7.3.1.1 Specifications The melting Point shall be from 130 “C to 135 “C. A mixed melting Point shall be from 130 “C to 135
5、 “C and shall not be less than either the Sample nitroso derivative or the Standard nitroso derivative. 7.3.1.2 Reagents 7.3.1.2.1 Sulfuric acid, H2S04, p = 1,84 g/l (DANGERx). 7.3.1.2.2 Sodium nitrite Solution, NaNO*, 100 g/l. Dissolve 10 g of sodium nitrite in 100 ml of water. 7.3.1.3 Apparatus 7.
6、3.1.3.1 Capillary-tube melting Point apparatus, complete with thermometer for the range 100 “C to 2OOOC. 7.3.1.4 Procedure 7.3.1.4.1 Preparation of nitroso derivatives Prepare the nitroso derivatives of the test Sample and a Sample known to be pmethylaminophenol sulfate 3 ISO 422: 1994(E) by treatin
7、g each in the following manner. Dissoive about 0,5 g in 10 ml of water and cool with ice to 5 “C to 10 “C. Add 5 drops of sulfuric acid (7.3.1.2.1) () and then add, drop by drop, 2 ml of the sodium nitrite Solution (7.3.1.2.2). Filter the precipita- tes, then wash with water and dry at 70 “C for 1 h
8、. 7.3.1.4.2 Melting Point determinations Prepare three capillary tubes containing: a) the derivative of the Sample to be tested; b) the derivative of the Sample known to be methylaminophenol sulfate; c) a finely ground mixture cf a) and b) mixed in equal proportions. Identify the tubes and attach th
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ISO4221994PHOTOGRAPHYPROCESSINGCHEMICALSSPECIFICATIONSFORPMETHYLAMINOPHENOLSULFATE 摄影 冲洗 化学品 甲基 氨基 苯酚

链接地址:http://www.mydoc123.com/p-1253789.html