Teledyne Leeman Labs»ç ICP-OES Prodigy Plus¸¦ ÀÌ¿ëÇÏ¿©
Coal Fly AshÀÇ Dual-View ºÐ¼®

Introduction
ºñ»êÀç(Coal Fly Ash)´Â ¹Ì¼¼ÇÏ°Ô ºÐ¼âµÈ ¼®ÅºÀ» Å¿ì´Â °úÁ¤¿¡¼ ¹ß»ýÇÏ´Â ºÎ»ê¹°·Î, ÁÖ¿ä ±¸¼º¹°ÁúÀÌ ½Ç¸®Ä«ÀÎ ¹Ì¼¼ ºÐ¸»Çü ¹°ÁúÀÔ´Ï´Ù. ÁÖ·Î ¼®Åº È·Â ¹ßÀü¼Ò¿¡¼ »ý»êµÇ¸ç ¼®Åº ¿¬¼Ò ÀÜ¿©¹° (CCR)·Î ¾Ë·ÁÁø ¼®Åº ¿¬¼Ò ºÎ»ê¹° Áß ÇϳªÀÔ´Ï´Ù. ´Ù¸¥ CCR ¹°Áú¿¡´Â ¹Ù´ÚÀç (Bottom Ash), º¸ÀÏ·¯ ½½·¡±× ¹× ¿¬µµ°¡½º (Flug Gas) ŻȲ ¹°ÁúÀÌ Æ÷ÇԵ˴ϴÙ.
2014³â¿¡´Â ¾à 1¾ï 3õ¸¸ÅæÀÇ ¼®ÅºÀÌ ¹Ì±¹¿¡¼ »ý»êµÇ¾î °¡Àå Å« »ê¾÷ Æó±â¹° À¯Çü Áß Çϳª°¡ µÇ¾ú½À´Ï´Ù. ÀÌ Æó±â¹°ÀÇ ´ëºÎºÐÀº ÀÚ¿ø Àý¾à DÁ¶ÀÇ ¿ä±¸»çÇ׿¡ µû¶ó ¸Å¸³Áö¿¡ ÀúÀåµË´Ï´Ù. ºñ»êÀç´Â ÄÜÅ©¸®Æ®, À¯µ¿¼º ÃæÀüÀç, Ŭ¸µÄ¿(Clinker), °ñÀç ´ëü Àç·á, Åä¾ç °³Á¶/¾ÈÁ¤È µîÀÇ ´Ù¾çÇÑ Á¦Ç°°ú Àç·á¿¡µµ »ç¿ëµÉ ¼ö ÀÖ½À´Ï´Ù. ºñ»êÀçÀÇ ÀÌ·¯ÇÑ ¿ëµµ´Â ȯ°æ°ú ¿ì¸®¿¡°Ô ¸Å¿ì ±àÁ¤ÀûÀÎ ¿µÇâÀ» ¹ÌĨ´Ï´Ù.
ºñ»êÀçÀÇ ±¸¼ºÀº ¿¬¼Ò¿¡ »ç¿ëµÈ ¼®ÅºÀÇ Æ¯¼º°ú Á÷Á¢ÀûÀ¸·Î °ü·ÃÀֱ⠶§¹®¿¡ Æó±â ¹× Àç»ç¿ë ¸ðµÎ¿¡¼ ¹Ì·® ¿ø¼Ò³ª ÁÖ¿ä ¿ø¼Ò°¡ ħÃâµÇ¾î ȯ°æ À§ÇèÀ» ÃÊ·¡ÇÒ ¼ö ÀÖ½À´Ï´Ù. µû¶ó¼ ºñ»êÀç´Â ¿ø¼Ò Á¶Á¤À» È®ÀÎÇØ¾ßÇϸç À̸¦ À§ÇØ ±Ý¼Ó °áÁ¤ÀÇ Å×½ºÆ®°¡ ÁøÇàµË´Ï´Ù.
Instrumentation
Dual-view ÅäÄ¡¿Í Teledyne CETAC ASX-280 ¿ÀÅä»ùÇ÷¯(120 position, Ohama, NE)°¡ ÀåÂøµÈ Prodigy Plus Inductively Coupled Plasma (ICP) ºÐ±¤°è¸¦ »ç¿ëÇÏ¿© ÀÌ ÀÀ¿ë³ëÆ®ÀÇ µ¥ÀÌÅ͸¦ ºÐ¼®Çß½À´Ï´Ù.

ÁÂ) ICP-OES Prodigy Plus ¿ì) Teledyne CETAC ASX-280 Autosampler
Prodigy Plus´Â Mega pixelÀÇ ´ëÇü Æ÷¸Ë CMOS (L-CMOS) °ËÃâ±â¿Í 800mm ÃÊÁ¡ °Å¸® Echelle ±¤ÇÐ ½Ã½ºÅÛÀ» °áÇÕ½ÃŲ Ź»óÇü µ¿½Ã ICP-OESÀÔ´Ï´Ù. L-CMOSÀÇ È°¼º ¿µ¿ªÀº 28x28mm·Î ÇöÀç ICP-OES¿¡¼ »ç¿ëµÇ°í ÀÖ´Â ´Ù¸¥ °íü °ËÃâ±âº¸´Ù ÈξÀ Å®´Ï´Ù. ÀÌ Á¶ÇÕÀ» ÅëÇØ Prodigy Plus´Â ´Ù¸¥ °íü °ËÃâ±â ±â¹Ý ICP ½Ã½ºÅÛº¸´Ù ³ôÀº ±¤ÇÐ ÇØ»óµµ¸¦ ¾òÀ» ¼ö ÀÖ½À´Ï´Ù. °ËÃâ±â´Â 165nm¿¡¼ 1100nm »çÀÌÀÇ ¿¬¼ÓÀûÀÎ ÆÄÀå ¹üÀ§¸¦ Á¦°øÇÏ¿© ÆÄÀå ¹üÀ§³ª ºÐÇØ´ÉÀÇ ÀúÇϾøÀÌ ÇÑ ¹ø¿¡ Àüü ICP ½ºÆåÆ®·³À» ÃøÁ¤ÇÒ ¼ö ÀÖ½À´Ï´Ù. ¿°¼Ò ¶Ç´Â ºê·Ò ÃøÁ¤ÀÌ ÇÊ¿äÇÑ ÀÀ¿ë ºÐ¾ßÀÇ °æ¿ì, ¼±ÅÃÀû ÇÒ·Î°Õ °ËÃ⠽ýºÅÛÀ» »ç¿ëÇÒ ¼ö ÀÖ¾î ÆÄÀå ¹üÀ§¸¦ 135-1100nm±îÁö È®ÀåÇÒ ¼ö ÀÖ½À´Ï´Ù. ¶ÇÇÑ Ä«¸Þ¶óÀÇ °í¼Ó ÆÇµ¶Àº »ç½Ç»ó °ËÃâ±â ºÎ°¡½Ã°£ (Overhead time)À» Á¦°ÅÇϸç, ÆÇµ¶ ½Ã°£Àº ¾à 1ÃÊÀ̹ǷΠRandom access, ºñÆÄ±« ÆÇµ¶ÀÌ °¡´ÉÇÑ 6ÀÚ¸® ÀÌ»óÀÇ ´ÙÀ̳ª¹Í ·¹ÀÎÁö¸¦ Á¦°øÇÕ´Ï´Ù. Prodigy Plus´Â 40.68MHzÀÇ °·ÂÇÑ Free-running RF ¹ß»ý±â¸¦ »ç¿ëÇÏ¿© ÀϹÝÀûÀÎ À¯±â ¿ëÁ¦ »Ó ¾Æ´Ï¶ó °¡Àå ¾î·Á¿î ½Ã·á ¸ÅÆ®¸¯½ºµµ ó¸®ÇÒ ¼ö ÀÖ½À´Ï´Ù.
Sample Introduction
ÀÌ ÀÀ¿ëÀÚ·á¿¡´Â Ryton¢ç Spray Chamber¿Í Hildebrand Grid ³×ºæ¶óÀÌÀú·Î ±¸¼ºµÈ HF¿¡ ³»¼ºÀ» Áö´Ñ ½Ã·á ÁÖÀÔ ½Ã½ºÅÛÀÌ »ç¿ëµÇ¾ú½À´Ï´Ù. (±×¸² 4) Ç¥ÁØ ¼®¿µ ½Ã·á ÁÖÀÔ±â´Â HF ³»¼º ¾Ë·ç¹Ì³ª·Î ±³Ã¼µÇ¾ú½À´Ï´Ù. Hildebrand Grid´Â ¿¹¿ÜÀûÀÎ ´Ù¿ëµµÀÇ ºÐ¹«±â·Î¼ HF »Ó¸¸ ¾Æ´Ï¶ó ¼ö¼º, À¯±â¹°, °í¿ëÁ¸ °íÇü¹° µî °ÅÀÇ ¸ðµç ¸ÅÆ®¸¯½º¿¡¼ÀÇ ½Ã·á¿¡ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù. ÀÌ Á¦Ç°ÀÇ ¼³°è´Â ¿ì¼öÇÑ °ËÃâ ÇѰè¿Í ¿ëÇØµÈ °íÇü¹°¿¡ ÀÇÇÑ ¸·Èû¿¡ ´ëÇØ ³ôÀº È¿À²À» Á¦°øÇÕ´Ï´Ù. Prodigy Plus ÅäÄ¡´Â ½Ã·á À¯ÇüÀÌ ´õ ³ôÀº À¯·®À» ÇÊ¿ä·Î ÇÒ °æ¿ì, ÃÖ´ë 20L/min¿¡¼ ÀÛµ¿ÇÒ ¼ö ÀÖ´Â ÂøÅ»½Ä, ÀúÀ¯·® ¼³°èÀÔ´Ï´Ù. (±×¸² 4)
ÅäÄ¡ ¼ö¸íÀ» Çâ»ó½ÃŰÀÌ À§ÇØ Prodigy Plus´Â Radial, Axial and Dual view¿Í °°Àº ¸ðµç ±â±¸ ±¸¼º¿¡ ªÀº ¹æ»çÇü ÅäÄ¡¸¦ »ç¿ëÇÕ´Ï´Ù. Viewing ports, slots ¹× È®ÀåµÈ ÅäÄ¡ ±æÀÌ´Â »ç¿ëµÇÁö ¾Ê½À´Ï´Ù.
±×¸² 4. Ryton¢ç Spray Chamber, Hildebrand Grid Nebulizer ¹× Prodigy Plus Torch
Operating Parameters
ÀÌ ¿¬±¸¿¡ »ç¿ëµÈ Prodigy Plus ÀÛµ¿ ÆÄ¶ó¹ÌÅÍ Ç¥ 1¿¡ »ç¿ëµÈ ÆÄÀå ¹× ÇöóÁ view ±¸¼ºÀº Ç¥ 2¿¡ ³ªÅ¸³»¾ú½À´Ï´Ù.
Ç¥1. Instrument Operating Parameters
Parameter |
Setting |
RF Power |
1.2 kW |
Coolant Flow |
14 L/min |
Auxiliary Flow |
0 |
Torch |
Quartz Demountable |
Injector |
Alumina |
Nebulizer Pressure |
42 psi |
Nebulizer |
Hildebrand Grid |
Spray Chamber |
RytonTM |
Sample Uptake
Rate |
35 rpm |
Axial Integration Time |
15 s |
Radial
Integration time |
5 s |
Ç¥2. Analytical Wavelenghths
Element |
Wavelength, nm |
View |
|
Element |
Wavelength, nm |
View |
Al |
308.215 |
Radial |
|
Mn |
257.610 |
Axial |
396.152 |
Radial |
|
259.372 |
Axial |
As |
189.042 |
Axial |
|
Na |
588.995 |
Radial |
193.759 |
Axial |
|
589.592 |
Radial |
Ba |
233.527 |
Radial |
|
Ni |
231.604 |
Axial |
493.409 |
Radial |
|
232.003 |
Axial |
Ca |
315.887 |
Radial |
|
Pb |
217.000 |
Axial |
317.933 |
Radial |
|
220.353 |
Axial |
Cr |
267.716 |
Axial |
|
Si |
251.611 |
Radial |
283.563 |
Axial |
|
288.158 |
Radial |
Cu |
324.754 |
Axial |
|
Sr |
407.771 |
Radial |
327.396 |
Axial |
|
421.552 |
Radial |
Fe |
238.204 |
Radial |
|
Ti |
334.941 |
Radial |
259.940 |
Radial |
|
336.122 |
Radial |
K |
766.491 |
Radial |
|
V |
292.401 |
Axial |
769.897 |
Radial |
|
310.230 |
Axial |
Mg |
279.078 |
Radial |
|
Zn |
202.548 |
Axial |
285.213 |
Radial |
|
206.200 |
Axial |
Sample Preparation
NIST SRM 1633C Coal Fly Ash´Â ´ÙÀ½ ÀýÂ÷´ë·Î ÁغñµÇ¾ú½À´Ï´Ù.
1. 0.2000gÀÇ ½Ã·á¸¦ Ī·®Çϰí Teflon¢â ºñÀÌÄ¿¿¡ ÷°¡ÇÕ´Ï´Ù.
2. ½Ã·á¸¦ ¿ÏÀüÈ÷ µ¤À»¸¸Å dzºÐÇÑ Ãʼø¼ö(DI)¸¦ ÷°¡ÇÕ´Ï´Ù.
3. 5mLÀÇ ¿Õ¼ö (Áú»ê : ¿°»ê = 1 : 3 ºñÀ²)¿Í 2mLÀÇ ºÒ»ê(HF)À» ÷°¡ÇÕ´Ï´Ù.
4. ºñÀÌÄ¿¸¦ Teflon¢â Ä¿¹ö·Î µ¤°í 95~100¡É¿¡¼ 2½Ã°£µ¿¾È °¡¿ÇÕ´Ï´Ù. ½Ã·á°¡ »êºÐÇØµÇ¾úÀ¸¸é °¡¿¿ø¿¡¼ ºñÀÌÄ¿¸¦ Á¦°ÅÇÏ°í ½Ç¿ÂÀ¸·Î ³Ã°¢ÇÕ´Ï´Ù.
5. Whatman¢ç42 ¿©°úÁö¸¦ »ç¿ëÇÏ¿© ÇÃ¶ó½ºÆ½ 100mL ºÎÇÇ Çöó½ºÅ©¿¡ °É·¯³»°í Ãʼø¼ö¸¦ ÀÌ¿ëÇÏ¿© 100gÀ¸·Î Èñ¼®ÇÕ´Ï´Ù.
Calibration Stansdards
±³Á¤ Ç¥Áع°Àº VHG Labs (Manchester, NH)ÀÇ ´ÜÀÏ ¿ø¼Ò Ç¥Áع°À» »ç¿ëÇÏ¿© ÁغñµÇ¾ú½À´Ï´Ù. Ç¥ÁØ ¹°ÁúÀº 5mLÀÇ ¿Õ¼ö¿Í 2mLÀÇ HF¸¦ ÷°¡ÇÑ ´ÙÀ½, Ãʼø¼ö¸¦ ÀÌ¿ëÇØ 100gÀ¸·Î Èñ¼®ÇÏ¿© ½Ã·á¿Í µ¿ÀÏÇÑ ¸ÅÆ®¸¯½º·Î ¸ÂÃè½À´Ï´Ù. ±³Á¤ Ç¥Áع° ³óµµ´Â Ç¥ 3¿¡ ³ªÅ¸³»¾ú½À´Ï´Ù.
Ç¥3. Calibration Standard Concentrations, mg/kg
Element |
Std0 |
Std1 |
Std2 |
Std3 |
Al |
0 |
200 |
400 |
800 |
As, Cr, Cu, Mn, Ni, Zn |
0 |
0.20 |
0.50 |
1.00 |
Ba, Sr |
0 |
1.00 |
2.00 |
5.00 |
Ca, K |
0 |
20.0 |
50.0 |
100 |
Fe |
0 |
100 |
200 |
400 |
Mg |
0 |
5.00 |
10.0 |
20 |
Na |
0 |
2.00 |
5.00 |
10.0 |
Pb |
0 |
0.10 |
0.20 |
0.50 |
Si |
0 |
250 |
500 |
1000 |
Ti |
0 |
10.0 |
20.0 |
50.0 |
V |
0 |
0.50 |
1.00 |
2.00 |
Results and Discussion
NIST SRM 1633C Coal Fly Ash ½Ã·á´Â Ç¥ 2¿¡ ³ª¿µÈ ºÐ¼® ÆÄÀå ¹× ÇöóÁ view ±¸¼º¿¡¼ Ç¥ 1¿¡ Ç¥½ÃµÈ ÀÛµ¿ ÆÄ¶ó¹ÌÅ͸¦ »ç¿ëÇÏ¿© ºÐ¼®µÇ¾ú½À´Ï´Ù. ºÐ¼® °á°ú´Â Ç¥ 4¿¡ ³ªÅ¸³ÂÀ¸¸ç ÃøÁ¤µÈ °ªÀº ÀÎÁõµÈ NIST °ª°ú °ÅÀÇ ÀÏÄ¡ÇÕ´Ï´Ù. ¶ÇÇÑ 2°³ÀÇ ¼·Î ´Ù¸¥ ÆÄÀå¿¡¼ ÃøÁ¤µÈ ¿ø¼Ò´Â °á°ú°£¿¡ ¿ì¼öÇÑ ÀÏÄ¡¸¦ ³ªÅ¸³»¾î ½ºÆåÆ®·³ °£¼·ÀÌ ¾øÀ½À» ³ªÅ¸³À´Ï´Ù. (Both inter-element or intra-order)
Ç¥4. NIST SRM 1633 Results
Element |
Concentration |
SD |
RSD |
Units |
Certified Value |
% Recovery |
Al
308.215 r |
13.08 |
0.039 |
0.30 |
% |
13.28 |
98.5 |
Al
396.152 r |
12.98 |
0.061 |
0.47 |
97.8 |
As
189.042 |
186.2 |
3.347 |
1.80 |
mg/kg |
186.2 |
100.0 |
As
193.759 |
178.7 |
1.86 |
1.04 |
96.0 |
Ba
233.527 r |
0.111 |
0 |
0.20 |
% |
0.1126 |
98.6 |
Ba
493.409 r |
0.11 |
0.001 |
0.59 |
97.7 |
Ca
315.887 r |
1.348 |
0.004 |
0.33 |
% |
1.365 |
98.8 |
Ca
317.933 r |
1.339 |
0.005 |
0.38 |
98.1 |
Cr
267.716 |
272.9 |
1.326 |
0.49 |
mg/kg |
258 |
105.8 |
Cr
283.563 |
270.9 |
0.785 |
0.29 |
105.0 |
Cu
324.754 |
172.1 |
0.498 |
0.29 |
mg/kg |
173.7 |
99.1 |
Cu
327.396 |
169.5 |
0.786 |
0.46 |
97.6 |
Fe
238.204 r |
10.30 |
0.068 |
0.66 |
% |
10.49 |
98.2 |
Fe
259.940 r |
10.28 |
0.068 |
0.66 |
98.0 |
K
766.491 r |
1.754 |
0.006 |
0.36 |
% |
1.773 |
98.9 |
K
769.897 r |
1.733 |
0.008 |
0.47 |
97.7 |
Mg
279.078 r |
0.492 |
0.002 |
0.39 |
% |
0.498 |
98.8 |
Mg
285.213 r |
0.491 |
0.002 |
0.33 |
98.6 |
Mn
257.610 |
239.5 |
0.548 |
0.23 |
mg/kg |
240.2 |
99.7 |
Mn
259.372 |
239.0 |
0.605 |
0.25 |
99.5 |
Na
589.592 r |
0.163 |
0.001 |
0.89 |
% |
0.1707 |
95.5 |
Na
588.995 r |
0.167 |
0 |
0.06 |
97.8 |
Ni
231.604 |
133.0 |
0.254 |
0.19 |
mg/kg |
132 |
100.8 |
Ni
232.003 |
130.8 |
2.129 |
1.63 |
99.1 |
Pb
220.353 |
94.40 |
0.803 |
0.85 |
mg/kg |
95.2 |
99.2 |
Pb
217.000 |
94.29 |
3.824 |
4.06 |
99.0 |
Si
251.611 r |
20.84 |
0.19 |
0.91 |
% |
21.3 |
97.9 |
Si
288.158 r |
20.95 |
0.133 |
0.63 |
98.4 |
Sr
407.771 r |
892.4 |
2.641 |
0.30 |
mg/kg |
901 |
99.0 |
Sr
421.552 r |
889.8 |
6.791 |
0.76 |
98.8 |
Ti
334.941 r |
0.709 |
0.003 |
0.45 |
% |
0.724 |
97.
9 |
Ti
336.122 r |
0.703 |
0.006 |
0.89 |
97.1 |
V
292.401 |
283.3 |
0.549 |
0.19 |
mg/kg |
286.2 |
99.0 |
V
310.230 |
280.6 |
1.044 |
0.37 |
98.1 |
Zn
202.548 |
236.1 |
0.964 |
0.41 |
mg/kg |
235 |
100.5 |
Zn
206.200 |
235.5 |
0.727 |
0.31 |
100.2 |
Sr
407.771 r |
892.4 |
2.641 |
0.30 |
mg/kg |
901 |
99.0 |
Sr
421.552 r |
889.8 |
6.791 |
0.76 |
98.8 |
Ti
334.941 r |
0.709 |
0.003 |
0.45 |
% |
0.724 |
97.9 |
Ti
336.122 r |
0.703 |
0.006 |
0.89 |
97.1 |
V
292.401 |
283.3 |
0.549 |
0.19 |
mg/kg |
286.2 |
99.0 |
V
310.230 |
280.6 |
1.044 |
0.37 |
98.1 |
Zn
202.548 |
236.1 |
0.964 |
0.41 |
mg/kg |
235 |
100.5 |
Zn
206.200 |
235.5 |
0.727 |
0.31 |
100.2 |
HF ³»¼º ½Ã·á µµÀÔ ½Ã½ºÅÛÀº ¶Ù¾î³ °¨µµ¿Í Á¤¹Ðµµ¸¦ Á¦°øÇϺó´Ù. Hildebrand grid ³×ºæ¶óÀÌÀú´Â ´Ù¸¥ ¸¹Àº HF ³»¼º ³×ºæ¶óÀÌÀúº¸´Ù ´õ È¿À²ÀûÀÌ¸ç °ß°íÇÕ´Ï´Ù. Hildebrand grid´Â HF ³»¼º »Ó¸¸ ¾Æ´Ï¶ó ¸·Èû Çö»óÀ̳ª ¾Æ¸£°ï °¡½À±â ¾øÀ̵µ ³ôÀº ¼öÁØÀÇ ¿ëÇØ °íÇü¹° (>10%)À» ó¸®ÇÒ ¼ö ÀÖ½À´Ï´Ù.
CMOS °ËÃâ±â´Â ´ÜÀÏ ÆÇµ¶°ª ¹× °¢ ÇöóÁ view ±¸¼º¿¡ ´ëÇØ ¸ðµç ½Ã·áÀÇ ¿ø¼Ò ¹æ»ç ·¹º§À» Æ÷ÂøÇÒ ¼ö ÀÖ¾î ºÐ¼® ½Ã°£À» ´ëÆø ´ÜÃàÇÒ ¼ö ÀÖ¾ú½À´Ï´Ù. ¿ø¼Ò °£ÀÇ °µµ Â÷ÀÌ¿¡ °ü°è¾ø°í ÇÊ¿äÇÑ °µµ·Î ÆÄÀåÀ» ºÐ·ùÇϱâ À§ÇÑ »çÀü °Ë»ç¾øÀÌ ÇÑ ¹ø¿¡ ¿©·¯ ÆÄÀåÀ» ÀûºÐÇÒ ¼ö ÀÖ½À´Ï´Ù. °ËÃâ±âÀÇ ³ôÀº ÆÇµ¶ ¼Óµµ´Â 1ÃÊ À̳»¿¡ 150°³ ÀÌ»óÀÇ ÆÄÀåÀ» ¼öÁýÇß½À´Ï´Ù. Prodigy Plus´Â ³·Àº À¯·®ÀÇ ÅäÄ¡¿Í °áÇÕµÈ ÁøÁ¤ÇÑ Àúºñ¿ë ºÐ¼®À» Á¦°øÇÏ¿© ½Ã·á 󸮷®À» ³ôÀ̱â À§ÇØ Àüü ºÐ¼®½Ã°£À» ÁÙ¿©¼ ¾Æ¸£°ï ¼Òºñ¸¦ ÁÙÀÔ´Ï´Ù. ÀÌ·¯ÇÑ ¸ðµç ¼Ó¼ºµéÀÌ °áÇÕµð¾î Prodigy Plus´Â ³ÐÀº ¹üÀ§ÀÇ ºÐ¼® ³óµµ¸¦ °¡Áø ½Ã·á¸¦ ºÐ¼®ÇÏ´Â ½ÇÇè½Ç¿¡ ÀÌ»óÀûÀÎ ½Ã½ºÅÛÀÔ´Ï´Ù.
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