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产品名称: 氯离子分析仪 氯离子分析仪 氯离子分析仪
产品时间: 2016-08-02
产品型号:
产品特点: 氯离子分析仪方法提要用规定的蒸馏装置在250℃~260℃温度条件下,以过氧化氢和磷酸分解试样,以净化空气做载体,进行蒸馏分离氯离子,用稀硝酸作吸收液,蒸馏10min-15min后,用乙醇吹洗冷凝管及其下端于锥形瓶内,乙醇的加入量占75%(体积分数)以上。在PH3.5左右,以二苯偶氮碳酰肼为指示剂,用硝酸汞标准滴定溶液进行滴定。

氯离子分析仪 氯离子分析仪 氯离子分析仪 的详细介绍

氯离子分析仪

 
  技术参数
 
  Model 926 Model 926S
 
  样品量 500 microlitres 20 microlitres
 
  分析范围: 10-999mg Cl/l; 2-165mg%Salt 10-299mmolCl/l
 
  分析时间: 35 sec @ 200mgl/l 35 sec@ 100mmolCl/l
 
  准确度: SD <1% @ 0.1% Cl Std Solution +-2% @ NQCS 100mmol/l
 
  线性: 1% in range 10-999mgCl/l 1% 10-299 mmolCl/l
 
  重现性: CV for 20 replicates
 
  <1.5% @ 200mgCl/l <1.5% @ 100mmolCl/l
 
  REAGENT SYSTEM
 
  The Sherwood Buffer system is optimised to eliminate interfering ions and incorporates a special dispersant to ensure reproducible formation of the silver chloride precipitate and enhance analytical performance.
 

 主要特点

 
  使用方便, 自动化操作.
 
  很高的灵敏度.
 
  很高的选择性.
 
  The coulometric method is very robust and versatile
 
  o The Sherwood microprocessor based Instrument is ergonomically designed and easy to use and maintain
 
  o The Sherwood Buffer System specifically designed for the model 926 gives outstanding sensitivity and selectivity
 
  --------------------------------------------------------------------------------
 
  仪器介绍 [下载样本]
 
  KEY APPLICATION AREAS
 
  The measurement of Salt (Sodium Chloride) concentration in the Food and Dairy Industry is universal. The ability to read direct in Salt concentration makes the SHERWOOD Model 926 the instrument of choice for manufacturers and food analysts around the world.
 
  Salt and salinity also represents serious contamination in Industrial processes and the sensitivity of the coulometric method enables measurement in the ppm range in boiler feed water, polymer washes. bore hole slurries, as well as soils analysis and others. The 926 has proven itself to be the method of choice for many desalination studies and general quality control of sample lines.
 
  Clinical measurement of the chloride ion is essential for monitoring of electrolyte balance of patients as it plays, in combination with sodium and potassium, an important part in maintaining water balance between cells, plasma and interstitial fluid. The Model 926s is also widely used in the confirmation of the diagnosis of Cystic Fibrosis. The model 926S variant can accept 20 microlitre samples.
 
  Sherwood Scientific has method notes for these and other Applications. Pharmaceutical Production, Cement Manufacture, Photography Veterinary.
 
  PRINCIPLES OF METHOD
 
  The main difficulties with the classic method were that silver nitrate reagent would change on storage due to a photochemical reaction and that the titration end point is visually weak. The reagent would have to be standardized requiring a highly skilled analytical technician
 
  The 926 method is based on a coulometric titration and is an absolute method where the reagent, the silver ions, is precisely and quantitatively generated at the time of the analysis by passing a constant current between donor electrodes. The end point is detected by the use of sensing electrodes which measure the change in solution conductivity which occurs when excess silver ions are present in solution.
 
  英文名称:
 
  Chloride ion analyzer

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