公开(公告)号：US3706532A

公开(公告)日：1972-12-19

申请号：US3706532D

申请日：1971-08-20

Applicant: BETZ LABORATORIES

Inventor： NOLL CHARLES A

IPC: G01N31/02 ,  G01N31/22 ,  G01N33/18

CPC classification number: G01N31/22 ,  G01N31/02 ,  Y10S422/90 ,  Y10T436/25125

Abstract: The present disclosure is directed to a method for determining the zinc concentration in an aqueous medium. More specifically, the method is directed for use to aqueous mediums which contain contaminated and perhaps interfering metal ions, such as the cations of aluminum, iron and copper. According to the method, the sample of the aqueous medium is acidified, treated with a buffered complexing agent to complex any aluminum and iron ions present, treated with an organo-sulfur compound which will complex with any copper ions present and discriminate against any zinc ions present. An indicator compound which will react with the zinc to produce a color has been added to the aqueous medium and the color intensity of the resulting solution is ascertained. The color intensity is then compared with the color intensity of known quantities of zinc and the indicator compound, and the concentration of the zinc is ascertained accordingly.

Abstract translation: 本公开涉及一种用于测定水性介质中锌浓度的方法。 更具体地，该方法被用于含有受污染的和可能干扰的金属离子的水性介质，例如铝，铁和铜的阳离子。 根据该方法，将水性介质的样品酸化，用缓冲的络合剂处理以使存在的任何铝和铁离子复合，用与存在的任何铜离子复合的有机硫化合物处理，并区分任何锌离子 当下。 将与锌反应产生颜色的指示剂化合物加入到水性介质中，确定得到的溶液的着色强度。 然后将颜色强度与已知量的锌和指示剂化合物的颜色强度进行比较，并且相应地确定锌的浓度。

公开(公告)号：US3536637A

公开(公告)日：1970-10-27

申请号：US3536637D

申请日：1968-09-03

Applicant: BETZ LABORATORIES

Inventor： NOLL CHARLES A ,  STEFANELLI LOUIS J

IPC: B01J49/00 ,  B01D15/06 ,  C02B1/76

CPC classification number: B01J49/60

公开(公告)号：US3468796A

公开(公告)日：1969-09-23

申请号：US3468796D

申请日：1967-10-13

Applicant: BETZ LABORATORIES

Inventor： NOLL CHARLES A ,  SALVIA LUCIANO J LA

IPC: C02F1/68 ,  C05C1/00 ,  B01D13/00

CPC classification number: C02F1/686 ,  C02F2103/023 ,  C05C1/00

公开(公告)号：US3656908A

公开(公告)日：1972-04-18

申请号：US3656908D

申请日：1970-12-01

Applicant: BETZ LABORATORIES

Inventor： NOLL CHARLES A ,  FEDDERN EDWARD C ,  STEFANELLI LOUIS J

IPC: G01N31/22 ,  G01N21/20 ,  G01N21/24 ,  G01N33/18

CPC classification number: G01N31/22

Abstract: Method of determining the chromium concentration in an aqueous medium containing either or both trivalent chromium or hexavalent chromium. The method generally entails acidifying the aqueous medium, oxidizing any trivalent chromium present in the aqueous medium to hexavalent chromium, and adding to the medium a composition comprising a water-soluble cobaltous salt and a chelating agent of the acetic acid derivative type. The color intensity of the resulting medium is then measured and compared to the intensity of samples of aqueous medium containing known quantities of chromate in its hexavalent state which have been treated in the same manner. One of the other features of the invention is the composition used in the method.

Abstract translation: 测定含有三价铬或六价铬中的一种或两种铬的水性介质中的铬浓度的方法。 该方法通常需要酸化水性介质，将存在于水性介质中的任何三价铬氧化成六价铬，并向介质中加入包含乙酸衍生物类型的水溶性钴铵盐和螯合剂的组合物。 然后测量所得介质的颜色强度，并将其与已经以相同方式处理的六价态的已知量的铬酸盐的含水介质样品的强度进行比较。 本发明的其它特征之一是用于该方法的组合物。

公开(公告)号：US3622277A

公开(公告)日：1971-11-23

申请号：US3622277D

申请日：1969-12-29

Applicant: BETZ LABORATORIES

Inventor： NOLL CHARLES A ,  STEFANELLI LOUIS J

IPC: G01N31/02 ,  G01N31/22

CPC classification number: G01N31/02 ,  Y10T436/18

Abstract: Method for determining the sulfate ion concentration of an aqueous solution. The mechanism of the method resides in the use of a chelate of a metal which under acidic conditions dissociates to release metal ions which will react with the sulfate ion present to produce a colloidal metal sulfate precipitate. In order to ensure that the free chelant does not precipitate or react to form a precipitate, there is also added to the solution a quantity of a metal compound, the metal of which will replace the original metal of the chelate to form a water soluble second chelate. The turbidity or color density of the aqueous solution is measured and compared to the color density values obtained for solutions containing known quantities of sulfate precipitate of the same metal.

公开(公告)号：US3574551A

公开(公告)日：1971-04-13

申请号：US3574551D

申请日：1968-12-09

Applicant: BETZ LABORATORIES

Inventor： NOLL CHARLES A ,  STEFANELLI LOUIS J

IPC: G01N31/22 ,  G01N33/18

CPC classification number: G01N31/22 ,  Y10T436/16

Abstract: TEST METHOD FOR DETERMINING THE PHOSPHATE CONTENT OF LIQUIDS CONTAINING COMPLEX PHOSPHATES OR POLYPHOSPHATE COMPOUNDS, COMPRISING ADDING TO A SMALL SAMPLE OF THE LIQUID TO BE TESTED A FIRST AQUEOUS SOLUTION COMPRISING A WATER SOLUBLE FERRIC SALT, AN ALKALI METAL HALIDE, AN ALKALI METAL SALT OF A LOWER FATTY ACID AND A FIRST LOWER FATTY ACID. THE RESULTING SOLUTION IS THEN ALLOWED TO MIX AND A SECOND SOLUTION COMPRISING A HYDROXYBENZOIC ACID AND A SECOND LOWER FATTY ACID IS ADDED THERETO. THE COLOR INTENSITY OF THE RESULTING SOLUTION IS THEN MEASURED AND COMPARED TO A KNOWN STANDARD.