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¿µÁøÄÚÆÛ·¹ÀÌ¼Ç Á¾ÇÕÄ«´Ù·Î±× |
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References |
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ISO 13878 : |
Soil quality - Determination of total nitrogen content by dry combustion (Elemental analysis) |
ISO 15178 : |
Soil quality - Determination of total sulfur by dry combustion (Elementary analysis)
Determination of total sulfur by dry combustion (Elementary analysis) Describes a procedure
using dry combustion for the determination of total sulfur in soil samples. It is important to note that high temperature
combustion methods might not determine total sulfur, only combustible sulfur. The difference between total and
combustible sulfur is usually negligible in soils. |
ISO 10694 : |
Soil quality - Determination of organic and total carbon after dry combustion (Elemental analysis) |
EN13654-2 : |
Soil improvers and growing media - Determination of nitrogen - Part 2: Dumas method |
EN 13137 : |
Characterisation of waste: determination of total organic carbon in waste, sludges and sediments. |
ASTM D5291 : |
Test method for Instrumental determination of C, H and N in petroleum products and lubricants. |
Tested with VELP Scientifica EMA 502 Elemental Analyzer |
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Introduction
¾î´À ¹°ÁúÀÇ Åº¼Ò¿Í Áú¼ÒÀÇ ºñÀ² Áï carbon-to-nitrogen ratio (C:N ratio) °¡ 24:1 À̶ó°í Çϸé ÀÌ´Â ±× ¹°ÁúÀº 24°³ÀÇ Åº¼Ò´ÜÀ§´ç 1°³ÀÇ Áú¼Ò ´ÜÀ§°¡ ÀÖ´Ù´Â °ÍÀ» ÀǹÌÇÑ´Ù.
ÀÌ·¯ÇÑ C:N Ratio ´Â ½Ä¹°µî¿¡¼ Nitrogen Limitation ÀÇ ÁöÇ¥·Î »ç¿ëµÉ Á¤µµ·Î ¸Å¿ì Áß¿äÇѵ¥ ¿¹¸¦ µé¾î ÀÌ ºñÀ²ÀÌ ³ôÀ¸¸é ¹°ÁúÀ» ºÐÇØÇϴµ¥ ´õ ¸¹Àº ½Ã°£ÀÌ ÇÊ¿äÇÏ°í ÀÌ ºñÀ²ÀÌ ³·À¸¸é ½Ä¹°ÀÇ ºÐÇØ ¼Óµµ°¡ ´õ ºü¸£°Ô ÀÏ¾î ³¯ °ÍÀÌ´Ù. ±×¸®°í Åä¾ç¼ÓÀÇ Áú¼ÒÀÇ ¾çÀº
½Ä¹°ÀÇ ¼ºÀå°ú ¾ÆÁÖ ¹ÐÁ¢ÇÑ ¿µÇâÀ» ¹ÌÄ¡°í ÀÖ´Ù.
Sulfur ´Â »ý¹°°è¿¡¼ ¸Å¿ì Áß¿äÇÑ ¿ø¼ÒÀÌ°í ¶ÇÇÑ Çʼö ¿µ¾ç¼Ò·Î¼ ¿¹¸¦ µé¾î ½Ä¹°¿¡¼ ±¤ÇÕ¼ºÀ» ÅëÇØ starch, sugar, oil, fat, vitamin ±×¸®°í ´Ù¸¥ ¹°ÁúÀ» »ý»êÇÏ´Â
chlorophyll ÀÇ »ý¼º¿¡ Çʼö ±â´ÉÀ» ÇÑ´Ù. ±×·¯¹Ç·Î sulfur ÀÇ ¾çÀ» ½Å¼ÓÇÏ°í Á¤È®ÇÏ°Ô ÃøÁ¤ÇÏ´Â °ÍÀº ½Ä¹° ¹× ³ó¾÷µîÀÇ ºÐ¾ß¿¡¼ ¸Å¿ì Áß¿äÇÑ ÀÛ¾÷ÀÌ´Ù.
¼ö¼Ò´Â ½Ä¹°ÀÌ °¡Àå ¸¹ÀÌ »ç¿ëÇÏ´Â ÇÙ½É ¿ø¼Ò·Î¼ ¿¹¸¦ µé¾î Åä¾ç¿¡¼ ¼ö¼ÒÀÇ ¾çÀº Åä¾çÀÇ pH ¿¡ ¿µÇâÀ» ¹ÌÄ£´Ù. ´ëºÎºÐ Çã¿ëµÇ´Â pH ¹üÀ§´Â 6.0 ¿¡¼ 7.0 »çÀÌ ÀÌ¸ç ¿µ¾çÀÌ °áÇÌÇÒ °æ¿ì¿¡´Â
´ëºÎºÐÀÌ pH °¡ ¸Å¿ì ³ô°Å³ª ³·À» °æ¿ì¿¡ ÀϾÙ.
CHNS determination in soils and sediments
¨ç |
C. H. N. S. ¿ø¼ÒºÐ¼®±â´Â ¸ÕÀú ½Ã·á¸¦ combustion furnace ¿¡¼ 1000¡ÆC ÀÌ»óÀÇ ¿Âµµ¿¡¼
½Ã·á¸¦ combustion (CF) ÇÏ¿© ¿¬¼Ò½ÃŲ´Ù. |
¨è |
combustion furnace ÇϺο¡´Â °íÈ°¼ºÈµÈ cooper powder °¡ µé¾îÀÖ´Â VELP Vcopper¢â °¡ Àִµ¥
¿©±â¿¡¼ Áú¼Ò»êȹ° NOx ¸¦ N2 ·Î ȯ¿ø½ÃÅ°°Ô µÈ´Ù |
¨é |
»ý¼ºµÈ gas ´Â gas-chromatographic column À¸·Î À̵¿ÇÏ¿© °¢°¢ÀÇ ¿ø¼Ò´Â °¢±â ´Ù¸¥ gas retention time ¿¡ ÀÇÇØ
ºÐ¸®°¡ ÀϾÙ. |
¨ê |
ºÐÀÌµÈ Àüü gas ´Â LoGas¢â Thermal Conductivity Detector (TCD) ·Î À̵¿ÇÏ¿© Àüü gas ÀÇ ¾çÀÌ ÃøÁ¤µÇ¾îÁø´Ù. |
Sample Preparation
Å×½ºÆ®¿¡ »ç¿ëµÇ´Â WEPAL ÀÇ reference soil and sediment »ùÇÃÀº ´ÙÀ½°ú °°´Ù.
- Reference soil samples : reference soil
- Expected range values declared on the certificate : C% = 0.09 - 0.13%     S% = 0.09 - 0.13%
Analysis Procedure
´ÙÀ½°ú °°Àº Á¶°ÇÀ¸·Î ½Ã·áÀÇ ¿ø¼Ò¸¦ ÃøÁ¤ÇÏ¿´´Ù.
- O2 flow rate: 300 ml/min
- O2 factor: 0.7 ml/mg
- Min. Oxygen Volume : 10 ml
- ºÐ¼®½Ã°£ : from 12 minutes for one run
Typical CHNS Results on soil samples
CHNS Calibration Àº ÀÎÁõµÈ Ç¥ÁØ Sulphanilic acid (code A00000434, 0.15 - 0.5 mg range) ¸¦ ÀÌ¿ëÇÏ¿© calibration curve ¸¦ ¸¸µé¾úÀ¸¸ç
ÀÌ ¶§ »ç¿ëÇÑ Sulphanilic acid ÀÇ °¢ ¿ø¼Ò ÇÔ·®Àº ´ÙÀ½°ú °°´Ù.
- C% = 41.58
- H% = 4.04
- N% = 8.08
- S% = 18.48
45-50 mg ÀÇ ½Ã·á¸¦ ÀÌ¿ëÇÏ¿© ÃøÁ¤µÈ %C, %S, %N and %H ´Â ´ÙÀ½ Å×À̺í°ú °°´Ù.
Conclusion
À§ °á°ú¿¡¼ ¿ì¸®´Â EMA 502 Elemental Analyzer CHNS-O ´Â Åä¾ç ½Ã·á¿¡¼ carbon, hydrogen, nitrogen ±×¸®°í sulfur ¿ø¼ÒÀÇ
ÇÔ·®À» ÃøÁ¤Çϴµ¥ ¸Å¿ì ÀûÇÕÇÏ¸ç ½Å·ÚÇÒ ¼ö ÀÖ´Â µ¥ÀÌÅ͸¦ ±¸ÇÒ ¼ö ÀÖ´Â ¿ø¼Ò ºÐ¼® Àåºñ¶ó´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù.
Main advantages of VELP Combustion analyzer
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Áú¼Ò 0.001mg ±îÁö ÃøÁ¤ÇÒ ¼ö ÀÖ´Â ÃÊÁ¤¹Ð ÃøÁ¤´É·Â°ú 0.2% (Sulphanilic acid) º¸´Ù ÈξÀ ³·Àº »ó´ëÇ¥ÁØÆíÂ÷ÀÇ Å¹¿ùÇÑ ÀçÇö¼º |
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Çõ½ÅÀû ±â¼ú°ú Á¤Ç°¼Ò¸ðÇ° Áö¿ø¿¡ ÀÇÇÑ ¸Å¿ì ³·Àº ½Ã·á´ç ÃøÁ¤ ºñ¿ë |
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¸Å¿ì ½±°í ºü¸¥ Àåºñ ¼³Ä¡ |
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´©±¸³ª ½±°Ô »ç¿ëÇÒ ¼ö ÀÖµµ·Ï ¼³°èµÈ Çõ½ÅÀûÀÎ User Interface |
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FDA ±ÔÁ¤ÀÌ ÇÊ¿äÇÑ Á¦¾à, ÈÀåÇ°, ½ÄÇ° ºÐ¾ß¿¡¼ »ç¿ëÇϱâ À§ÇÑ Á¶°ÇÀÎ 21 CFR Part 11 Package °¡´É (option) |
EMA 502 Carbon, Hydrogen, Nitrogen, Sulfur & Oxygen Elemental Analysis
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