| 摘要: |
| 于1995年综合应用液体浮力-密度-盐度-溶液性质等原理研制浮力式盐度计。该盐度计具有操作简单、测试快速、不用电源和试剂、使用前无需标准海水标定、测试值不受样品成分变化影响的特点；其测盐精度可达克纽森滴定法，适用于一般工业化生产、水产养殖、港湾河口区调查等。 |
| 关键词: 浮力盐度计 盐度 测量 |
| DOI： |
| 分类号: |
| 基金项目:山东省科委基金资助项目，17940428号 |
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| A BUOYANCY SALINOMETER |
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BAO Wan-you,Hou Bao-rong
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Insititule of Oceanology, The Chinese Academy of deiences, Qingdao, 266071
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| Abstract: |
| A new buoyancy salinometer suitable for field and laboratory uses has been designed and made in 1995. This instrument is characterized by low cost, simple construction and high reliability. Its main advantages include simple operation and fast determination; no power source, chemical agent and standard correction before determination are needed Its accuracy of measurement is Immune to the interference by suspended material and seawater constituent variations. This method is accurate to 0.02, the same as that of the Kundsen method. The present experiment shows that the salinity derived using the salinometer is correct with the seawater temperature ranging from 0 to 35°C. The buoyancy salinometer can be applied to the monitoring of surface seawater salinity in nearshore, estuarine and mariculture areas.
1 Principle and apparatus
The principle of buoyancy salinometer is based upon the interrelationships between buoyancy, density and salinity. For a buoyancy meter with given volume and weight, the buoyancy is related to the density of seawater which is influenced by the seawater temperature and salinity. If the temperature is known, the salinity can be determined.
The buoyancy salinometer consists of a buoyancy meter, a centigrade thermometer, a slide salinity ruler, a ruler for correcting the temperature effect, a sampling volumeter and a safeguarding device for the buoyancy meter.
Three salinity rulers can be used for the salinity ranges of 0-16, 16-32, and 32-48, respectively. These are matched by three rulers for uses with temperature of 0-35°C.
2 Calibration
The water level line is applied to calibrate the basic position for the temperature ruler.
3 The working curve
The working curve of the buoyancy salinometer (Fig.1) shows that the buoyancy salinometer has a satisfactory responsibility for a salinity range of 0-48.
4 Precision and accuracy
The precision and accuracy were determined by Beihai Brach of the State Standard Measure Center. The data shown in Tables 1 and 2 are satisfactory for salinity measurements using the buoyancy salinometer. |
| Key words: Buoyancy salinometer, Salinity, Measurement |
