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3Â¥2008-03-11 11:15:10
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4Â¥2008-03-11 11:15:56
chaimoxiu1982
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5Â¥2008-03-11 11:18:09
ljz88
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ÒÒõ£±ûͪ·Ö¹â¹â¶È·¨²â¶¨Ë®ÐÔÍ¿ÁÏÖм×È© ¼°²âÁ¿²»È·¶¨¶ÈÆÀ¹À ÀîÓñÎä, ÕÅ¡¡×¿ (¹ú¼Ò»·¾³·ÖÎö²âÊÔÖÐÐÄ, ±±¾©¡¡100029) ¡¡¡¡ÕªÒª: ¶ÔÓÃÓڲⶨÄÚǽͿÁÏÖÐÓк¦ÎïÖʼ×È©µÄÒÒõ£±ûͪ·Ö¹â¹â¶È·¨½øÐÐÁËÏêϸÑо¿¡£ÊµÑé ½á¹û±íÃ÷,ÒÒõ£±ûͪ·Ö¹â¹â¶È·¨¹¤×÷ÇúÏßÓÐÁ¼ºÃµÄÎȶ¨ÐÔ¡£¹¤×÷ÇúÏßбÂʵÄÏà¶Ô±ê׼ƫ²îΪ 0. 74%¡£Îª´ïµ½¶¨Á¿·ÖÎöÄ¿µÄ,ÑùÆ·ÕôÁóʱ,¼ÓÈëË®µÄÌå»ýÓ¦²»µÍÓÚ200 mL,Í¿ÁÏÑùÆ·²ÐÁôÁ¿Ó¦ СÓÚ5 mL¡£ÑùÆ·ÕôÁóÒºÖм×ȩӦÔÚµ±Ìì²â¶¨¡£Í¿ÁÏÑùÆ·Öиߺ¬Á¿¼×È©µÄ»ØÊÕÂÊÆ½¾ùֵΪ 98. 5% ,µÍº¬Á¿¼×È©µÄ»ØÊÕÂÊÆ½¾ùֵΪ87. 9%¡£¶ÔÒÒõ£±ûͪ·Ö¹â¹â¶È·¨²â¶¨Ë®ÐÔÍ¿ÁÏÖм×È©º¬ Á¿µÄ²»È·¶¨¶È½øÐÐÁËÆÀ¹À¡£ ¹Ø¼ü´Ê: ¼×È©; ÒÒõ£±ûͪ·Ö¹â¹â¶È·¨; ²âÁ¿²»È·¶¨¶ÈÆÀ¹À; Ë®ÐÔÍ¿ÁÏ ÖÐͼ·ÖÀàºÅ: O657. 32; O213. 1; O623. 511¡¡¡¡¡¡ÎÄÏ×±êʶÂë: A ÊÕ¸åÈÕÆÚ: 2006204205; ÐÞ¶©ÈÕÆÚ: 2006206222 »ù½ðÏîÄ¿: ¹ú¼Ò¿Æ¼¼²¿·ÖÎö²âÊÔм¼Êõз½·¨ÏîÄ¿(¿Æ2003) ;¹ú¼Ò¿Æ¼¼»ù´¡Ìõ¼þƽ̨ÏîÄ¿¡ª¡ª¡ªÈ«¹ú·ÖÎö²âÊÔÌåϵµÄ ½¨Á¢ÓëÍêÉÆ[ FC (03 - 04Äê¶È) 01 ] ×÷Õß¼ò½é: ÀîÓñÎä(1956 ) ,ÄÐ,ºþ±±Î人ÈË,¸ß¼¶¹¤³Ìʦ,·ÖÎö»¯Ñ§×¨Òµ¡£E2mail: liyuwu@cneac. com¡£ Determ ination of Harmful Substance Formaldehyde inWater2soluble Coatings and Evaluation of theMeasurement Uncerta inty L I Yu2wu, ZHANG Zhuo (Na tio na l Re se a rch Cen te r fo r Enviro nm en ta lAna lys is a nd Me a su rem e n ts, Be ijing¡¡100029, Ch ina ) Abstract: UV spectrophtometric analysismethod with acetylacetone as color develop ing reagent, for determina2 tion of formaldehyde in water2soluble coatings are studied in details. The results of the study show that the calibration curve of the method has good stability. The relative standard deviation of the slope of calibration curves is 0. 74%. Some notices should be taken in samp le p reparation: a) water volume added to the coating samp le should be more than 200 mL before separating formaldehyde from solid samp le by distillation, b) after distillation, the volume of remnant of coating samp le and watermixture should be less than 5 mL, c) the formal2 dehyde in distillation solution should be determined at the same day. The experiments also show that the mean recoveries for high and low levels of formaldehyde in coatings are 98. 5% and 87. 9% , respectively. The uncer2 tainties of analysis results are also estimated. Key words: formaldehyde; spectrophotometrywith acetylacetone; evaluation ofmeasurement uncertainty, water2 soluble coating ¡¡¡¡×°ÊÎ×°ÐÞ²ÄÁÏÊͷŵÄÓк¦ÆøÌåÊÇÊÒÄÚ¿ÕÆøÎÛ È¾µÄÖ÷ÒªÀ´Ô´,¼×È©ÊÇÆäÖÐÖ÷ÒªÎÛȾÎΪÁË´ÓÔ´ Í·ÉÏ¿ØÖÆÊÒÄÚÎÛȾ,Ïà¹Ø¹ú¼Ò±ê×¼ÒÑ·¢²¼,ÈçÖйú »·¾³±êÖ¾²úÆ·È϶¨±ê×¼[ 1 ] ¡¢ÄÚǽͿÁϵÈ×°ÊÎ×°ÐÞ ²ÄÁÏÖÐÓк¦ÎïÖʼ×È©[ 2 ]ÏÞÁ¿±ê×¼,²¢¹æ¶¨ÁËÓëÖ® ÅäÌ׵ļ×È©¼ì²â±ê×¼·½·¨: ÒÒõ£±ûͪ·Ö¹â¹â¶È ·¨[ 1 - 2 ] ¡£Ó÷ÖÎö»¯Ñ§×¨Òµ½Ç¶ÈÉó²é´Ë±ê×¼·½·¨, Ïà¹ØÎÄÏ×[ 1 - 2 ] ȱÉÙ¼×È©»ØÊÕÂʼ°¾«ÃܶÈÊý¾Ý¡£ |

6Â¥2008-03-11 16:14:33
ljz88
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7Â¥2008-03-11 16:16:28
ljz88
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8Â¥2008-03-12 08:12:08













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