上海11选5走势图

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红外光谱定量分析测量和操作条件的选择
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TIANJINSHINENGPUKEJIYOUXIANGONGSI

时间: 2019-01-12 浏览量: 48

红外光谱定量分析测量

(一)定量谱带的选择

上海11选5走势图LIXIANGDEDINGLIANGPUDAIYINGSHIGULIDE,XISHOUQIANGDUDA,ZUNSHOUXISHOUDINGLV,BUSHOURONGJIHEYANGPINQITAZUFENGANPI,JINLIANGBIMIANZAISHUIZHENGQIHECO2DEXISHOUFENGWEIZHICELIANG。DANGDUIYINGBUTONGDINGLIANGZUFENERXUANZELIANGTIAOYISHANGDINGLIANGDAISHI,PUDAIQIANGDUYINGJINLIANGBAOCHIZAIXIANGTONGSHULIANGJI,DUIYUGUTIYANGPIN,YOUYUSANSHEQIANGDUHEBOZHANGYOUGUAN,SUOYIXUANZEDEPUDAIZUIHAOZAIJIAOZHAIDEBOSHUFANWEINEI。



(二)溶剂的选择

SUOXUANRONGJIYINGNENGHENHAODIRONGJIEYANGPIN,YUYANGPINBUFASHENGFANYING,ZAICEDINGFANWEINEIRONGJIBUCHANSHENGXISHOU。WEILEXIAOCHURONGJIXISHOUDAIDEYINGXIANG,CANBICHIKEYONGKEBIANGUANGCHENGXISHOUCHILAIBUCHANG,HUOYONGJISUANJICHAPUJISHU。



(三)选择合适的透光率区域

TOUGUANGLVYINGKONGZHIZAI20%~65%FANWEIZHINEI。



(四)测量条件的选择

ZAISESANXINGYIQISHANGTONGCHANGYAOQIUXIAFENGKUAN、ZENGYIDI、SHIJIANCHANGSHUDA、SAOMIAOSUDUMAN,YIQUEBAOCELIANGZHUNQUEDU。FENG、ZENGYIHESAOMIAOSUDUSANZHEDEPIPEIYAOJINGGUODUOCICESHIQUEDING。YIQIDEFENBIANLVA、CELIANGJINGQUEDUGHESAOMIAOSUDURSANZHEZHIJIANDEGUANXIKEYONGRUXIAJINGYANSHIBIAOSHI:

WechatIMG228.jpeg


上海11选5走势图YOUSHANGSHIKEZHI,ZHIYOULIANGGELIANGKEYIRENYIXUANZE,ERDISANGELIANGYIYOUCIJUEDINGLE。LIRUYUYIYUANLAI2BEIDEJINGQUEDULAIJILUGUANGPUERBUJIANGDIFENBANNENGLI,ZEBIXUBAJILUSHIJIANYANZHANGWEIYUANLAIDE4BEI。


FTIRYIDEGUANGYUANBUWENDINGXINGKEYINQIGUANGPUDEWUCHA,BAOKUOJINGSUDUDEWUCHA,HUICHANSHENGGUIFENG,DONGJINGCHUANDONGZHUANGZHIDEQINGXIEHUIJIANGDIGUANGPUFENBANLV,YINCIZUODINGLIANGFENXIQIANYAODUIYIQIDE100%XIAN、FENBIANLV、BOSHUJINGDUDENGGEXIANGXINGNENGBIAOZHUNJINXINGJIANCHA。


上海11选5走势图YONGFTIRYIJINXINGDINGLIANGFENXI,QIGUANGPUSHIBADUOCISAOMIAODEGANSHETUJINXINGLEIJIAPINGJUNDEDAODE。YINWEIZAOSHENGSHISUIJIDE,XINHAOSHIYOUGUILVDE,SUOYIJINGGUODUOCILEIJIAPINGJUNKEYISHISUIJIZAOSHENGHUXIANGDIXIAO,TIGAOXINZAOBI。GENJUTONGJILILUN,XINZAOBIHELEIJIACISHUDEPINGFANGGENCHENGZHENGBI,ZHIYAOSHIYANSHUJUZHONGFUXINGHAO,LIYONGXINHAOPINGJUNJISHUKEJIANCHUYANMEIZAIZAOSHENGZHONGDEFEICHANGRUODESHIYANXINHAO。


定量分析要求FTIR仪器的室温恒定,否则光通量变化太大,影响测量准确度,因而每次开机后,均应检査仪器的光通量,保持相对恒定。另外,在每次样品测试前,先测参比(背景)光谱可减少CO2和水的干扰。仪器的长期稳定性也影响定量分析的重现生和准确度。


红外光谱定量分析测量

(五)吸收池厚度的测定

MIYONGGANSHETIAOWENFACEDINGXISHOUCHIHOUDUDEJUTIZUOFASHI:JIANGKONGYECAOFANGYUCELIANGGUANGLUZHONG,ZAIYIDINGDEBOSHUFANWEINEIJINXINGSAOMIAO,ZHEISHIJIUDEDAOGANSHETIAOWEN,RUTU3SUOSHI。LIYONGXIASHIJISUANYECAOHOUDUL:


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SHIZHONG,nWEIGANSHETIAOWENGESHU;σ2-σ1WEIBOSHUFANWEI。


例如在1825~625cm—1范围中出现24个干扰条纹,则


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GENJUYECAOHOUDUKEXUANZEBUTONGDESAOMIAOGUANGPUFANWEI,JIANBIAO2。


表2 液槽厚度L与光谱范围

L/mmσ/cm—1L/mmσ/cm—1
0.01255000~16660.102500~833
0.0255000~16660.301666~833
0.0505000~12500.501428~714
0.0753333~1000



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图3 三个吸收池的干涉波纹


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