甲醛测试

更新时间:2023-08-01 02:01:50 阅读: 评论:0

甲醛測試:游離法(游離水解甲醛)
稱1克樣辦放入裝有100亳升蒸餾水的三角瓶中,跟著放在40度的恆溫水浴鍋1小時(每隔5分鐘搖一次)。取三角瓶溶液配好樣(與以下2.5.1-2.5.4相同),再放入恆溫水浴鍋恆溫15分鐘。用紡織品甲醛測定儀測出甲醛含量。
甲醛含量的測定標准(AATCC 112):密封罐法(釋放甲醛)
1 材料:廣口瓶,0.95L,有密封蓋,小型金屬絲罔籃,恆溫箱,甲醛溶液,
2 容量瓶,移液管,量筒。儀器:紡織品甲醛測定儀。測試程序:
2.1剪取1g的試樣
2.2  在廣口瓶中加入50ml蒸餾水,將試樣放入金屬絲罔籃。密封后置于49℃的烘箱中存放20小時或65℃的烘箱中存放4小時。
2.3 取出廣口瓶密封管冷卻至少30分鐘。
作文开头结尾摘抄
2.4 從密封罐取出試樣和支架,重新蓋好瓶蓋,搖晃以便溶解瓶壁上的凝聚物,得到試樣試樣萃取液。
2.5.1 樣品空白:用移液器移取待測樣品溶液(5ml)至“樣品空白”比色瓶A、B、C中,向A、B、C比色瓶中加入蒸餾水1ml,蓋上瓶蓋搖勻。
2.5.2樣品:用移液器移取待測樣品溶液(5ml)至“樣品試劑”比色瓶A、B、C中,向A、B、C比色瓶中加入甲醛試劑1ml,蓋上瓶蓋搖勻。
2.5.3 水空白:在“水空白”比色瓶中加入5ml蒸鎦水,蓋上瓶蓋,待用。
2.5.4 試劑空白:向“試劑空白”比色瓶中加入5ml蒸鎦水,再用移液管加1ml甲醛試劑,蓋上瓶蓋搖勻。
2.6 將以上樣品空白、樣品、試劑空白的比色瓶放入58±1℃的水浴中恆溫6分鐘,取出于暗處冷卻至室溫。
2.7用紡織品甲醛測定儀測出甲醛含量。
Formaldehyde Spot Test for Textile Products
纺织品滴液法甲醛测试
1. Objective 目的
荀攸怎么读1.1 This test method is applicable to textile fabrics that may retain a residue of formaldehyde from the chemical finishing process. The nsitivity of this test is approximately 20 to 30 ppm.
车险种类该方法适用于测试经过整理的纺织品是否有残留甲醛。 该测试灵敏度约为20-30 PPM
2. Apparatus 儀器
2.1 Disposable pipettes 吸管(可任意使用)
2.2 Glass rod 玻璃棒
2.3 Glass plate 玻璃板(盤)
密的反义词
2.4 White paper towel 白紙巾
3. Reagents (*Reagent grade chemicals shall be ud in this test)試劑(此測試將會用到化學藥品)
3.1 川贝母用量Sulfuric Acid (95 to98%)硫酸(95-98%
3.2 钻洞Dl Water 蒸留水
3.3 Phenyl hydrazine C6H8N2
3.4 Anhydrous ferric chloride無水氯化鐵FeCl3
4. Procedure 程序
4.1 A small sample of fabric (Approx.1’’ square) is placed on a white paper towel atop a glass plate. 小的織物樣辦(約1’’正方形)放在玻璃板的白紙巾上。
4.2 Two or three drops of Formaldehyde Spot Test Solution #1 are dropped onto the fabri
c and absorbed into it. (if the droplet beads up and does not penetrate the fabric , a glass rod is ud to rub the droplet into the fabric)
滴两三滴1号测试溶液在试样上并让试样吸收,如果布样没有吸收,用玻棒将测试溶液完全到布样里
4.3 Two or three drops of Formaldehyde Spot Test Solution #2 are dropped on the wet fabric After a 30-cond wait, dab the sample with a white tissue. inspect the white tissue and the white paper toweling below the fabric .The appearance of a pink color indicates the Prence of formaldehyde.(For white fabrics ,color change can be inspected directly on the fabrics)
再滴两三滴段五笔怎么打字2号测试溶液在同样的布样上,30韩国用英语怎么说秒钟后,用白纸巾轻拍布样。观察白纸巾和布样下面的白纸巾是否有粉红色斑渍,如有则表示布样含甲醛。(如果布样是白色的,则可以直接观察布样的变色情况确定是否含甲醛)
Note: Since formaldehyde is volatile, the test sample should be submitted in a aled package, which should not be opened until testing is ready to proceed.
注解:甲醛屬于揮發性的,測試樣本提交時應該密封包裝,直到測試時才打開。
5. Appendix附錄
5.1 Preparation of Formaldehyde Spot Test Solutions #1 and #2甲醛#1#2溶液配備
5.1.1 Solution #1:Place 41.7g (approximately 22.7ml) of 95-98% sulfuric acid in 38.3g(approximately 38.3 ml) of Dl water in a 100ml beaker .To this beaker , add 1.0g (approximately 0.91 ml) of phenyl hydrazine and an additional 19.0 g (approximately 19ml) of Dl water. This yields a 100g total solution weight.
#1溶液:取41.7g(大約22.7ml95-98%的硫酸和38.3g(大約38.3ml)蒸留水在100ml大口燒杯中,往燒杯加入1.0g(大約0.91ml)苯肼和另加19.0g(大約19ml蒸留水,共計100g溶液重量。
5.1.2 Solution #2 : Dissolve 10.0g of anhydrous ferric chloride in 90.0g(approximately 90ml) of Dl water , This yields a 100 g total solution weight.
#2溶液:溶解10.0g無水氯化鐵在90.0g(大約90ml)蒸留水中,共計100g..
注﹕因该测试为定性测试,无法给出具体含量,评级时,如果有甲醛,应该标注:
Prence.  没有的话,就标Null, 写 Negative 也行。

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