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时间:2018-12-19
《HG3-1070-1977 化学试剂 硝酸铅》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中华人民共和国石油化学工业部部标准HG3-1070-77化学试剂代替HGB3226-60硝酸铅本试剂为白色结晶。溶于水,有毒分子式:Pb(NO3)2分子量:331.21(按1975年国际原子量)一、技术条件1.Ph(NO,):含量不少于分析纯···········.......................................···············⋯⋯9900o;化学纯·······,,,·····甲甲,·········‘··一,,··········甲甲,甲甲二98.5%a.水溶液反应:合
2、格。3.杂质最高含量(指标以%计):分析纯化学纯(1)澄清度试验合格合格(2)水不溶物o.0050.02(3)抓化物(CU0.0010.005(4)铁(Fe)0.0010.003(5)铜(Cu)0.00050.001(6)硫化氢不沉淀物(以硫酸盐计)0.050.1二、检验规则按GB619-77之规定进行取样及验收。三、试验方法测定中所需标准溶液、杂质标准液、制剂及制品按GB601-77,GB602-77,GB603-”之规定制备1.Ph(NO3)2含量测定:称取。.5克样品,称准至。.0002克。溶于100毫升水中
3、,加3毫升冰乙酸及5克六次甲基四胺,3滴。.2%二甲酚橙指示液,用0.05M乙二胺四乙酸二钠标准溶液滴定至溶液呈亮黄色Pb(NO):含量/(X)按「式计算:发布中华人民共和国石油化学工业部提出1978年10月1日上海市化工局上海试荆四厂HG3---1070-77V·CX0.3312X100一召式中:V一乙二胺四乙酸二钠标准溶液之用量,毫升;C一一乙二胺四乙酸二钠标准溶液之克分子浓度,M;(;一一样品重量,克;0.3312一一每毫克分子Pb(NO,)之克数。2.水溶液反应:称取5克样品,称准至。.01克。溶于100毫
4、升不含二氧化碳的水中,用酸度计测定,pH值应在3.5以上3.杂质测定:样品须称准至。.01克。(1)澄清度试验:称取10克样品,溶于10。毫升水中,其浊度不得大于澄清度标准:分析纯··········,。······································,··················,··⋯⋯3号;化学纯······························,..............................................5号。(2)水不溶物:将测
5、定澄清度试验的溶液,在水浴上保温1小时,用恒重的4号玻璃滤祸过滤,用2%硝酸溶液洗涤滤渣至洗液无铅离子反应,于105-110C烘至恒重。滤渣重量不得大于:分析纯········,········································,,···············⋯⋯。.5毫克;化学纯·································································⋯⋯2.。毫克。(3)抓化物:称取1克样品,溶于25毫升水中,加2毫升5N硝
6、酸及1毫升。1N硝酸银,摇匀,放置I。分钟。所呈浊度不得大于标准。标准是取下列数量的Cl分析纯·········,··········,···························,··············⋯⋯。.01毫克;化学纯······························································⋯⋯。.05毫克。与样品同时同样处理。(4)铁:量取10毫升“溶液I”,稀释至20毫升,加2毫升10YO磺基水杨酸溶液,摇匀,加5毫升10YO氨水,摇匀
7、。所呈黄色不得深于标准。标准是取下列数量的Fe:分析纯··,··························,···································一。.01毫克;化学纯·.......................·甲·..........................................。.03毫克。稀释至20毫升,与同体积样品溶液同时同样处理。注溶液I的制备—称取4克样品,溶于30毫升水中,煮沸,滴加10毫升4N硫酸,冷却。稀释至40毫升,摇匀,过滤(5)铜
8、:量取10毫升“溶液I”,加5毫升10%柠檬酸按溶液,用10%氨水中和至pH9,稀释至25毫升加1毫升。.1%铜试剂,用5毫升四氯化碳萃取。有机层所呈黄色不得深于标准。标准是取下列数量的Cu:分析纯······························································⋯⋯。.005毫克;化学纯······
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