欧美性xxxx极品高清hd直播-国产精品中文字幕一区二区三区-国产激情小视频在线观看-国产高清亚洲一区-日本精品一区-日本韩国福利视频-女体拷问一区二区三区-成人精品视频在线-男生草女生视频-伊人久久大香线蕉av一区-夜夜春亚洲嫩草影院-大奶久久-日本手机看片-а√天堂www在线а√天堂资源-国产农村妇女毛片精品久久-亚洲天堂手机版-亚洲免费小视频-国产成人精品无码一区二区三区-久久国产超碰女女av-中文字幕乱码视频

咨詢熱線

18857131211

當(dāng)前位置:首頁  >  新聞中心

  • 2025

    9-9

    LC5050鄰苯檢測(cè)儀是一種專門用于檢測(cè)環(huán)境中鄰苯二甲酸酯類化合物濃度的設(shè)備,以下是其測(cè)定步驟:1.樣品準(zhǔn)備-代表性采樣:選擇具有代表性的樣品進(jìn)行檢測(cè),避免外界污染干擾。根據(jù)樣品類型(如空氣、水或固體材料),采用相應(yīng)的采樣方法。例如,空氣中鄰苯常用吸附管法采集;水樣則需經(jīng)過提取和濃縮處理;而固體材料可能需要切割、研磨或溶解等預(yù)處理步驟;-保持特性穩(wěn)定:在處理過程中注意防止目標(biāo)化合物的揮發(fā)或降解,確保樣品原始特性不受破壞。2.儀器校準(zhǔn)與檢查-狀態(tài)確認(rèn):每次使用前檢查儀器是否處于...

  • 2025

    8-29

    RoHS2.0指令是歐盟制定的環(huán)保法規(guī),旨在限制電子電氣設(shè)備中十種有害物質(zhì)的使用,以保護(hù)環(huán)境和人類健康。選擇適合的RoHS2.0儀器,需結(jié)合檢測(cè)需求、樣品類型、預(yù)算及法規(guī)要求,綜合評(píng)估儀器性能、技術(shù)原理及售后服務(wù)。一、明確檢測(cè)需求與物質(zhì)清單RoHS2.0指令限制的物質(zhì)包括鉛(Pb)、汞(Hg)、鎘(Cd)、六價(jià)鉻(Cr2)、多溴聯(lián)苯(PBBs)、多溴二苯醚(PBDEs)及四種鄰苯二甲酸酯類(DEHP、DBP、BBP、DIBP)。選擇儀器前,需明確以下問題:檢測(cè)物質(zhì)范圍:需覆蓋...

  • 2025

    8-13

    RoHS2.0熱裂解是一種用于分析電子電氣產(chǎn)品中指定有害物質(zhì)的檢測(cè)前處理技術(shù),其核心原理基于物質(zhì)在高溫?zé)o氧或低氧條件下的化學(xué)分解反應(yīng)。在熱裂解過程中,將待檢測(cè)的樣品置于指定的熱裂解設(shè)備中,該設(shè)備能夠快速升溫至設(shè)定的高溫區(qū)間,通常在幾百攝氏度到上千攝氏度不等,具體溫度取決于樣品的性質(zhì)和待分析物質(zhì)的特性。在高溫環(huán)境下,樣品中的有機(jī)成分會(huì)發(fā)生分子鏈的斷裂和重組,大分子有機(jī)物分解為小分子片段,例如聚合物材料會(huì)裂解成單體或低聚物等相對(duì)簡(jiǎn)單的有機(jī)化合物。對(duì)于RoHS2.0所涉及的一些有害...

  • 2025

    7-8

    LC5090RoHS2.0測(cè)試儀通過發(fā)射X射線照射樣品,樣品中的元素吸收能量后,會(huì)發(fā)射出具有特定能量的熒光X射線。由于不同元素的熒光X射線具有特定的能量,通過檢測(cè)這些熒光X射線的能量和強(qiáng)度,就可以確定樣品中各種元素的種類和含量。這種方法具有快速、非破壞性的特點(diǎn),能夠在短時(shí)間內(nèi)對(duì)大量樣品進(jìn)行檢測(cè)。電感耦合等離子體質(zhì)譜法(ICP-MS)是先將樣品進(jìn)行消解處理,使其轉(zhuǎn)化為可溶解的離子狀態(tài),然后引入電感耦合等離子體中。在高溫等離子體中,樣品中的元素被離子化并激發(fā)至不同的能級(jí),當(dāng)這些離...

  • 2025

    7-3

    熱裂解氣相色譜儀(PyrolysisGasChromatography,Py-GC)是一種結(jié)合熱裂解技術(shù)與氣相色譜分析的高效聯(lián)用儀器,廣泛應(yīng)用于高分子材料、復(fù)雜有機(jī)物、生物樣本等非揮發(fā)性或熱穩(wěn)定性差的物質(zhì)的定性定量分析。其核心原理是通過高溫裂解將大分子化合物轉(zhuǎn)化為小分子揮發(fā)性碎片,再利用氣相色譜進(jìn)行分離檢測(cè),從而揭示原始樣品的化學(xué)結(jié)構(gòu)信息。熱裂解氣相色譜儀的分析過程可分為裂解、分離、檢測(cè)三個(gè)核心階段,其原理涉及熱化學(xué)、分子動(dòng)力學(xué)及色譜分離科學(xué),具體流程如下:1.熱裂解階段:大...

  • 2025

    6-20

    RoHS2.0指令的核心目標(biāo)是減少電子電氣產(chǎn)品對(duì)環(huán)境的污染,其限制范圍涵蓋鉛、汞、鎘、六價(jià)鉻、多溴聯(lián)苯(PBB)和多溴二苯醚(PBDE)六種有害物質(zhì),并新增了鄰苯二甲酸酯類塑化劑的管控。這些物質(zhì)若在產(chǎn)品廢棄后未經(jīng)妥善處理,可能通過焚燒或填埋釋放到環(huán)境中,危害土壤、水源與生態(tài)系統(tǒng)。RoHS2.0儀器的核心功能是快速、準(zhǔn)確地分析材料中有害物質(zhì)的含量。其檢測(cè)原理主要基于光譜分析技術(shù),通過激發(fā)樣品中的原子或分子,使其發(fā)射特征光譜,從而識(shí)別元素種類與濃度。例如,X射線熒光光譜儀(XRF...

  • 2025

    6-6

    熱裂解氣相色譜儀(Py-GC)是一種結(jié)合了熱裂解和氣相色譜分析技術(shù)的強(qiáng)大工具。它能夠?qū)?fù)雜的有機(jī)聚合物或大分子物質(zhì)通過高溫裂解轉(zhuǎn)化為更小、更易揮發(fā)的碎片,然后利用氣相色譜進(jìn)行分離和定性定量分析。熱裂解氣相色譜儀構(gòu)成:-裂解器:作用是在嚴(yán)格控制的條件下對(duì)樣品進(jìn)行快速加熱,使其瞬間裂解成可揮發(fā)的小分子片段。常見的裂解器類型有管式爐裂解器、居里點(diǎn)裂解器、激光裂解器等。不同類型的裂解器在加熱方式、溫度控制精度、適用樣品范圍等方面各有特點(diǎn)。例如,居里點(diǎn)裂解器利用鐵磁性材料在居里點(diǎn)溫度下...

共 64 條記錄,當(dāng)前 1 / 10 頁  首頁  上一頁  下一頁  末頁  跳轉(zhuǎn)到第頁 

聯(lián)系我們

新典儀器(杭州)有限公司 公司地址:杭州市濱江區(qū)長(zhǎng)河街道聚才路105號(hào)1號(hào)樓301室   技術(shù)支持:化工儀器網(wǎng)
  • 聯(lián)系人:鐘剛
  • 手機(jī):17357177518
  • 公司傳真:86-0571-85192062
  • 郵箱:40684521@qq.com

掃一掃 更多精彩

網(wǎng)站二維碼

網(wǎng)站二維碼

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |