HG3-1070-1977化学试剂硝酸铅.pdf 3页

'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，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。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: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··········，·........................................................0.010毫克。稀释至10毫升，与同体积样品溶液同时同样处理。(6)硫化氢不沉淀物:称取4克样品，溶于水，加1毫升冰乙酸，稀释至100毫升，通硫化氢使铅沉淀完全静置后，过滤。取50毫升，置于恒重的蒸发皿中，加0.5毫升硫酸，加热至硫酸蒸气逸尽，于8。。C灼烧至恒重。残渣重量不得大于:分析纯············································，···················⋯⋯I.。毫克;化学纯·····，············】，········-·········甲·····甲，-·····‘···，····一2.。毫克四、包装及标志1.包装:按HG3--119-64之规定 HG3-1070-77内包装形式:G-3,Gz-3;外包装形式:1-1;包装单位:第4类2·标志:按HG3-119-64之规定。并注明“毒害品”、“氧化剂”。'