洗洁精的成分分析
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V为样品溶液消耗硫代硫酸钠标准溶液的体积，15为与1.00ml碘标准滴定溶液1
相当的以毫克表示的甲醛质量。
3.3操作步骤
3.3.1标准曲线的制作
分别吸取0.0,0.2,0.4,0.6,0.8ml的甲醛标准使用液(相当于0,2,4,6,8ug的甲醛)置于10ml的比色管中，加入2ml乙酸-乙酸铵缓冲溶液和1ml乙酰丙酮
5mlc(HCL)=2mol/L盐酸溶液酸化，加入100ml水，用浓度c(NaSO)=0.1mol/L223硫代硫酸钠标准溶液滴定至草黄色，加入1ml淀粉指示剂，继续滴定至蓝色消失为终点，同时做空白试验。
3.2甲醛标准溶液的计算
X=[(V-V)*C(NaSO)/5.0]*15 01223
式中X为甲醛标准溶液的浓度(mg/ml),V为试剂空白所消耗硫代硫酸钠的体积，0
1实验原理
样品中的甲醛在pH为5.5-7.0条件下，与乙酰丙酮及铵离子作用，生成黄色的3、5-乙酰基-1、4二氢吡啶二碳酸，在412nm波长下有最大Biblioteka Baidu收，用标准曲线法定量。
2仪器与试剂
1紫外可见分光光度计
2乙酰丙酮溶液:吸取3.0ml乙酰丙酮用水稀释至200ml;
3乙酰-乙酸铵缓冲溶液:称取15.42g乙酰胺溶于300ml水中，加入2.3ml冰醋酸，调PH值近5.75，用水稀释至400ml;
0溶液，加水至刻度，混匀，置70C水浴中放置30min，取出冷却至室温后，用1cm比色杯，于412nm处以零号管调节零点，测定吸光度。以吸光度及甲醛的含量为坐标，绘制标准曲线。
3.3.2甲醛含量的计算
称取1.0g洗洁精样品于50ml容量瓶中，用水稀释至刻度，摇匀，吸取1.0ml混合液于10ml比色管中，依据3.3.2项下自“加入2ml乙酸-乙酸铵缓冲液”起同法操作，同时做空白为参比液，根据测定的吸光度，从标准曲线上查出被测液中甲醛的含量，从而计算出样品中的甲醛的含量
4甲醛标准储备液:吸取5.0ml36%-38%甲醛溶液，置于500ml容量瓶中，加水稀释至刻度，用碘量法标定。然后用水稀释至每毫升相当于100ug甲醛，置于冰箱中保存;
5甲醛标准使用液:吸取10.00ml甲醛标准溶液，置于100ml容量瓶中，加水姿势至刻度。此标准溶液密度为10ug/mL;
3试验步骤
洗洁精的成分分析
洗洁精的成分分析
洗洁精的主要成分是烷基磺酸钠、脂肪醇醚硫酸钠、泡沫剂、增溶剂、香精、水、色素等。烷基磺酸钠和脂肪醇醚硫酸钠都是阴离子表面活性剂，是石化产品，用以去污。洗洁精是日常生活中不可缺的清洁用品，洁净温和，泡沫柔细，迅速分解油腻，快速去污、除菌，有效彻底清洁油污，不残留。
一洗洁精甲醛含量的测定(分光光度计法)
3.1甲醛标准溶液的配制和标定
吸取5.0ml甲醛标准溶液于250ml碘量瓶，加入40ml c(1/2I)=0.1mol/L2碘标准溶液，15mlc(NaOH)=1mol/L氢氧化钠溶液摇匀，放置10min,加入planning, and government financing, and whole village relocation, and first built Hou split" of principles, insisted big community planning, and large district transformation, break administrative divisions boundaries, optimization town spatial structure, speed up new Community construction, formed new community live building, and intensive with ground project, and enterprise tax insurance running, and Expand employment and improvepeople's livelihood shed changed economic chain. The second, on poverty relief and development work in this battle the mission objectives for poverty alleviation in the file are already quite clear, was the previous two years (2016-2017) concentrated hard, three years after (2018-2020), consolidation and improvement, by the end of 2017, the County ... ... A poor village and ... ... Library district all "pick hat" and "five-ten", ... ... All the rural poor out of poverty, stability to achieve "two worry about three". To accomplish these tasks, win the battle for poverty alleviation, the key is to find out the way, selecting the right breakthrough, effectiveness in order to work on. (A) to accurately identify objects for poverty alleviation. XI General Secretary noted that the critical time of poverty lies in precision. How to do accurate? ' first task is to do basic worksolid. Total demand is down to village, household, persons, County, town, and village books, card
相当的以毫克表示的甲醛质量。
3.3操作步骤
3.3.1标准曲线的制作
分别吸取0.0,0.2,0.4,0.6,0.8ml的甲醛标准使用液(相当于0,2,4,6,8ug的甲醛)置于10ml的比色管中，加入2ml乙酸-乙酸铵缓冲溶液和1ml乙酰丙酮
5mlc(HCL)=2mol/L盐酸溶液酸化，加入100ml水，用浓度c(NaSO)=0.1mol/L223硫代硫酸钠标准溶液滴定至草黄色，加入1ml淀粉指示剂，继续滴定至蓝色消失为终点，同时做空白试验。
3.2甲醛标准溶液的计算
X=[(V-V)*C(NaSO)/5.0]*15 01223
式中X为甲醛标准溶液的浓度(mg/ml),V为试剂空白所消耗硫代硫酸钠的体积，0
1实验原理
样品中的甲醛在pH为5.5-7.0条件下，与乙酰丙酮及铵离子作用，生成黄色的3、5-乙酰基-1、4二氢吡啶二碳酸，在412nm波长下有最大Biblioteka Baidu收，用标准曲线法定量。
2仪器与试剂
1紫外可见分光光度计
2乙酰丙酮溶液:吸取3.0ml乙酰丙酮用水稀释至200ml;
3乙酰-乙酸铵缓冲溶液:称取15.42g乙酰胺溶于300ml水中，加入2.3ml冰醋酸，调PH值近5.75，用水稀释至400ml;
0溶液，加水至刻度，混匀，置70C水浴中放置30min，取出冷却至室温后，用1cm比色杯，于412nm处以零号管调节零点，测定吸光度。以吸光度及甲醛的含量为坐标，绘制标准曲线。
3.3.2甲醛含量的计算
称取1.0g洗洁精样品于50ml容量瓶中，用水稀释至刻度，摇匀，吸取1.0ml混合液于10ml比色管中，依据3.3.2项下自“加入2ml乙酸-乙酸铵缓冲液”起同法操作，同时做空白为参比液，根据测定的吸光度，从标准曲线上查出被测液中甲醛的含量，从而计算出样品中的甲醛的含量
4甲醛标准储备液:吸取5.0ml36%-38%甲醛溶液，置于500ml容量瓶中，加水稀释至刻度，用碘量法标定。然后用水稀释至每毫升相当于100ug甲醛，置于冰箱中保存;
5甲醛标准使用液:吸取10.00ml甲醛标准溶液，置于100ml容量瓶中，加水姿势至刻度。此标准溶液密度为10ug/mL;
3试验步骤
洗洁精的成分分析
洗洁精的成分分析
洗洁精的主要成分是烷基磺酸钠、脂肪醇醚硫酸钠、泡沫剂、增溶剂、香精、水、色素等。烷基磺酸钠和脂肪醇醚硫酸钠都是阴离子表面活性剂，是石化产品，用以去污。洗洁精是日常生活中不可缺的清洁用品，洁净温和，泡沫柔细，迅速分解油腻，快速去污、除菌，有效彻底清洁油污，不残留。
一洗洁精甲醛含量的测定(分光光度计法)
3.1甲醛标准溶液的配制和标定
吸取5.0ml甲醛标准溶液于250ml碘量瓶，加入40ml c(1/2I)=0.1mol/L2碘标准溶液，15mlc(NaOH)=1mol/L氢氧化钠溶液摇匀，放置10min,加入planning, and government financing, and whole village relocation, and first built Hou split" of principles, insisted big community planning, and large district transformation, break administrative divisions boundaries, optimization town spatial structure, speed up new Community construction, formed new community live building, and intensive with ground project, and enterprise tax insurance running, and Expand employment and improvepeople's livelihood shed changed economic chain. The second, on poverty relief and development work in this battle the mission objectives for poverty alleviation in the file are already quite clear, was the previous two years (2016-2017) concentrated hard, three years after (2018-2020), consolidation and improvement, by the end of 2017, the County ... ... A poor village and ... ... Library district all "pick hat" and "five-ten", ... ... All the rural poor out of poverty, stability to achieve "two worry about three". To accomplish these tasks, win the battle for poverty alleviation, the key is to find out the way, selecting the right breakthrough, effectiveness in order to work on. (A) to accurately identify objects for poverty alleviation. XI General Secretary noted that the critical time of poverty lies in precision. How to do accurate? ' first task is to do basic worksolid. Total demand is down to village, household, persons, County, town, and village books, card